OPTImill MB4 Eng Manual

Operating Manual
Version 1.1.1
Drilling- milling machine

MB4
Part no. 3338450

333845001
333845002
333845003
EN
Table of contents
1 Safety
1.1 Rating plates.............................................................................................................................................5
1.2 Safety instructions (warning notes)...........................................................................................................6
1.2.1 Classification of hazards ...............................................................................................................6
1.2.2 Other pictograms ...........................................................................................................................7
1.3 Intended use .............................................................................................................................................8
1.4 Reasonably foreseeable misuses.............................................................................................................8
1.4.1 Avoiding misuse ............................................................................................................................9
1.5 Possible dangers caused by the drilling- milling machine ......................................................................10
1.6 Personnel qualification............................................................................................................................10
1.6.1 Target group................................................................................................................................10
1.6.2 Authorized persons .....................................................................................................................11
1.6.3 Obligations of the operating company .........................................................................................11
1.6.4 User's obligations ........................................................................................................................12
1.6.5 Additional requirements regarding qualification ..........................................................................12
1.7 User positions .........................................................................................................................................12
1.8 Safety measures during operation..........................................................................................................12
1.9 Safety devices ........................................................................................................................................13
1.9.1 Emergency switching off push button..........................................................................................13
1.9.2 Protective cover...........................................................................................................................14
1.9.3 Lockable master switch ...............................................................................................................14
1.9.4 Separation guard.........................................................................................................................14
1.10 Safety check ...........................................................................................................................................14
1.11 Personal protective equipment ...............................................................................................................15
1.12 For your own safety during operation .....................................................................................................15
1.13 Switching-off and securing the drilling- milling machine .........................................................................16
1.14 Using lifting equipment ...........................................................................................................................16
1.15 Positions of the symbols on the drilling- milling machine........................................................................16
1.16 Electronics ..............................................................................................................................................16
1.17 Inspection deadlines ...............................................................................................................................17
2 Technical specification
2.1 Installation plan.......................................................................................................................................20
3 Delivery, interdepartmental transport, assembly and commissioning
3.1 Notes on transport, installation, commissioning .....................................................................................21
3.1.1 General risks during internal transport ........................................................................................21
3.2 Scope of delivery ....................................................................................................................................22
3.3 Set-up and assembly ..............................................................................................................................22
3.3.1 Installation site requirements.......................................................................................................22
3.3.2 Load suspension point ................................................................................................................22
3.3.3 Assembly .....................................................................................................................................23
3.4 First commissioning ................................................................................................................................24
3.4.1 Power supply ...............................................................................................................................24
3.4.2 Cleaning and lubrication ..............................................................................................................24
3.4.3 Filling in gear oil ..........................................................................................................................24
4 Operation
4.1 Control and indicating elements .............................................................................................................25
4.2 Safety......................................................................................................................................................26
4.3 Switching on the drilling-milling machine ................................................................................................26
4.4 Switching off the drilling-milling machine ................................................................................................26
4.5 Inserting the tool .....................................................................................................................................26
4.5.1 Installation ...................................................................................................................................26
4.5.2 Removal ......................................................................................................................................27
MB4_GBIVZ.fm
4.5.3 Use of collets ...............................................................................................................................27

4.6 Clamping the workpieces........................................................................................................................27
4.7 Changing the speed range .....................................................................................................................28
4.7.1 Speed table three-phase drive ....................................................................................................28
EN MB4
2 Translation of original instruction Version 1.1.1 - 2021-1-25

4.7.2 Speed table one-phase drive ...................................................................................................... 29
4.8 Selecting the speed ................................................................................................................................ 29
4.8.1 Standard values for cutting speeds............................................................................................. 30
4.8.2 Standard values for speeds with HSS – Eco – twist drills........................................................... 31
4.9 Manual spindle sleeve feed with the fine feed........................................................................................ 31
4.10 Manual spindle sleeve feed with the spindle sleeve lever ...................................................................... 32
4.10.1 Drill depth stop ............................................................................................................................ 32
4.11 Swivelling the drill-mill head ................................................................................................................... 32
4.12 Thread tapping ....................................................................................................................................... 33
5 Maintenance
5.1 Safety ..................................................................................................................................................... 34
5.1.1 Preparation.................................................................................................................................. 34
5.1.2 Restarting.................................................................................................................................... 34
5.2 Inspection and maintenance .................................................................................................................. 35
5.3 Repair ..................................................................................................................................................... 38
5.3.1 Customer service technician ....................................................................................................... 38
6 Ersatzteile - Spare parts
6.1 Ersatzteilbestellung - Ordering spare parts ............................................................................................ 39
6.1.1 Wichtiger Hinweis - Important note ............................................................................................. 39
6.2 Hotline Ersatzteile - Spare parts Hotline ................................................................................................ 39
6.3 Service Hotline ....................................................................................................................................... 39
6.4 Fräskopf 1 von 6 - Milling head 1 of 6 .................................................................................................... 40
6.10 Fräsfutterschutz - Milling chuck protection ............................................................................................. 46
6.11 Schaltbox - Switch box ........................................................................................................................... 47
6.12 Säule - Column....................................................................................................................................... 51
6.13 Kreuztisch - Cross table ......................................................................................................................... 52
6.14 Maschinenschilder - Machine labels ...................................................................................................... 55
6.15 Schaltplan Drehstromantrieb - Wiring diagram three-phase drive ......................................................... 56
6.15.1 Teileliste Elektrik - Parts list electrical components - 400V......................................................... 57
6.16 Schaltplan einphasiger Antrieb - Wiring diagram one-phase drive ....................................................... 58
6.16.1 Teileliste Elektrik - Parts list electrical components - 230V......................................................... 59
7 Malfunctions
7.1 Milling machine malfunctions ................................................................................................................. 60
8 Appendix
8.1 Copyright ................................................................................................................................................ 61
8.2 Terminology/Glossary ............................................................................................................................ 61
8.3 Liability claims/warranty ......................................................................................................................... 62
8.4 Storage................................................................................................................................................... 63
8.5 Advice for disposal / Options of reuse .................................................................................................... 63
8.5.1 Decommissioning........................................................................................................................ 63
8.5.2 Disposal of new device packaging .............................................................................................. 64
8.5.3 Disposal of the old device ........................................................................................................... 64
8.5.4 Disposal of electrical and electronic components ....................................................................... 64
8.5.5 Disposal of lubricants and coolants............................................................................................. 64
8.6 Disposal via municipal collection facilities .............................................................................................. 65
8.7 Change information operating manual ................................................................................................... 65
8.8 Product follow-up.................................................................................................................................... 65
MB4_GBIVZ.fm
MB4 EN
Version 1.1.1 - 2021-1-25 Translation of original instruction 3

Preface
Dear customer,
Thank you very much for purchasing a product made by OPTIMUM.
OPTIMUM metal working machines offer a maximum of quality, technically optimum solutions
and convince by an outstanding price performance ratio. Continuous enhancements and prod-
uct innovations guarantee state-of-the-art products and safety at any time.
Before commissioning the machine please thoroughly read these operating instructions and get
familiar with the machine. Please also make sure that all persons operating the machine have
read and understood the operating instructions beforehand.
Keep these operating instructions in a safe place nearby the machine.
Information
The operating instructions include indications for safety-relevant and proper installation, opera-
tion and maintenance of the machine. The continuous observance of all notes included in this
manual guarantee the safety of persons and of the machine.
The manual determines the intended use of the machine and includes all necessary information
for its economic operation as well as its long service life.
In the paragraph "Maintenance" all maintenance works and functional tests are described which
the operator must perform in regular intervals.
The illustration and information included in the present manual can possibly deviate from the
current state of construction of your machine. Being the manufacturer we are continuously
seeking for improvements and renewal of the products. Therefore, changes might be performed
without prior notice. The illustrations of the machine may be different from the illustrations in
these instructions with regard to a few details. However, this does not have any influence on
the operability of the machine.
Therefore, no claims may be derived from the indications and descriptions. Changes and errors
are reserved!
Your suggestion with regard to these operating instructions are an important contribution to
optimising our work which we offer to our customers. For any questions or suggestions for
improvement, please do not hesitate to contact our service department.
If you have any further questions after reading these operating instructions and you are
not able to solve your problem with a help of these operating instructions, please con-
tact your specialised dealer or directly the company OPTIMUM.
Optimum Maschinen Germany GmbH
Dr.- Robert - Pfleger - Str. 26
D-96103 Hallstadt
Mail: info@optimum-maschinen.de
Internet: www.optimum-maschinen.com
_preface_GB.fm
EN MB4

1 Safety
Glossary of symbols
 provides further instructions
 calls on you to act
 listings
This part of the operating instructions

 explains the meaning and use of the warning notes included in these operating instructions,
 defines the intended use of the milling machine,
 points out the dangers that might arise for you or others if these instructions are not
observed,
 informs you about how to avoid dangers.
In addition to these operation instructions, please observe
 the applicable laws and regulations,
 the statutory provisions for accident prevention,
 the prohibition, warning and mandatory signs as well as the warning notes on the milling
machine.
When installing, operating, maintaining and repairing the milling machine, the relevant stand-
ards must be observed.
If European standards have not yet been incorporated in the national legislation of the country
in question, the specific applicable regulations of each country must be observed.
If necessary, relevant measures must be taken to comply with national regulations before com-
missioning the milling machine.
Always keep Master Labels close to the milling machine.
this documentation Master Labels
INFORMATION
If you are unable to rectify an issue using these operating instructions, please contact us for
advice:
Dr. Robert-Pfleger-Str. 26
D-96103 Hallstadt, Germany
Email: info@optimum-maschinen.de
1.1 Rating plates
DE Fräsmaschine Optimum Maschinen DE Fräsmaschine Optimum Maschinen

GB Milling machine Germany GmbH GB Milling machine Germany GmbH
ES Fresadora Dr.-Robert-Pfleger-Str. 26 Dr.-Robert-Pfleger-Str. 26
D-96103 Hallstadt ES Fresadora
FR Fraiseuse MB 4 FR Fraiseuse MB 4 D-96103 Hallstadt
IT Fresatrice IT Fresatrice
CZ Frézka CZ Frézka
DK
NO. 333 8450 3200 U/min NO. 33384503 1600 U/min
Freesmachine DK Freesmachine
FI Porajyrsin FI Porajyrsin
GR Φρεζοδραπανο GR
1,1/1,5 kW
Φρεζοδραπανο 1,1/1,5 kW
HU Marógép SN J HU Marógép
400 V ~50 Hz 400 V / 3 Ph SN J
NL Freesmachine NL Freesmachine
PL Frezarka ~60 Hz
PL Frezarka
PT Máquina de fresar PT Máquina de fresar
RO Maşină de frezat 320 kg Year 20 RO Maşină de frezat 320 kg Year 20
SL Frezalni stroj SL Frezalni stroj
TR Freze Tezgahı
MB4_GB_1.fm
TR Freze Tezgahı
MB4 EN

Master Labels
DE Fräsmaschine Optimum Maschinen DE Fräsmaschine Optimum Maschinen

GB Milling machine Germany GmbH GB Milling machine Germany GmbH
ES Fresadora Dr.-Robert-Pfleger-Str. 26 Dr.-Robert-Pfleger-Str. 26
ES Fresadora
D-96103 Hallstadt
FR Fraiseuse MB 4 FR Fraiseuse MB 4 D-96103 Hallstadt
IT Fresatrice IT Fresatrice
CZ Frézka CZ Frézka
DK
NO. 333 84502 1600 U/min NO. 333 84501 3150 U/min
Freesmachine DK Freesmachine
FI Porajyrsin FI Porajyrsin
GR Φρεζοδραπανο 1,1/1,5 kW GR Φρεζοδραπανο 1,1/1,5 kW
HU Marógép SN J HU Marógép
230 V / 1 Ph 230 V / 3 Ph SN J
NL Freesmachine NL Freesmachine
~50 Hz ~60 Hz
PL Frezarka PL Frezarka
PT Máquina de fresar PT Máquina de fresar
RO Masinã de frezat 320 kg Year 20 RO Maşină de frezat 320 kg Year 20
SL Frezalni stroj SL Frezalni stroj
TR Freze Tezgahı TR Freze Tezgahı
DE Fräsmaschine Optimum Maschinen

GB Milling machine Germany GmbH
ES Fresadora Dr.-Robert-Pfleger-Str. 26
D-96103 Hallstadt
FR Fraiseuse MB 4
IT Fresatrice
CZ Frézka
DK
NO. 333 8450 3150 U/min
Freesmachine
FI Porajyrsin
GR Φρεζοδραπανο
HU Marógép
1,1/1,5 kW
SN J
NL Freesmachine 440 V ~60 Hz
PL Frezarka
PT Máquina de fresar
RO Maşină de frezat 320 kg Year 20
SL Frezalni stroj
TR Freze Tezgahı
1.2 Safety instructions (warning notes)
1.2.1 Classification of hazards

We classify the safety warnings into different categories. The table below gives an overview of
the classification of symbols (ideogram) and the warning signs for each specific danger and its
(possible) consequences.
Symbol Alarm expression Definition / consequence
DANGER! Impending danger that will cause serious injury or death to people.
WARNING! A danger that can cause serious injury or death.
A danger or unsafe procedure that can cause personal injury or damage

CAUTION!
to property.
Situation that could cause damage to the milling machine and product,
as well as other types of damage.
ATTENTION! No risk of injury to persons.
Practical tips and other important or useful information and notes.

No dangerous or harmful consequences for people or objects.
INFORMATION
MB4_GB_1.fm
EN MB4

In case of specific dangers, we replace the pictogram with
or
general danger with a warning of injury to hands, hazardous electrical rotating parts.
voltage,
1.2.2 Other pictograms
Warning: danger of Warning: risk of stumbling! Warning: hot surface! Warning: biological hazard!
slipping!
Warning: automatic start- Warning: tilting danger! Warning: suspended loads! Caution, danger of
up! explosive substances!
Switching on forbidden! Read the operating Pull out the mains plug!
instructions before
commissioning!
Wear protective glasses! Wear protective gloves! Wear safety shoes! Wear a protective suit!
Use ear protection! Only switch during Protect the environment! Contact address
standstill!
MB4_GB_1.fm
MB4 EN

1.3 Intended use
WARNING!
In the event of improper use of the drilling- milling machine
 will endanger personnel,
 the drilling- milling machine and other material property of the operating company
will be endangered,
 the correct function of the drilling- milling machine may be affected.
The drilling- milling machine is designed and manufactured to be used for milling and drilling
cold metals or other non-flammable materials or materials that do not constitute a health hazard
by using commercial milling and drilling tools.
The drilling- milling machine must only be installed and operated in a dry and well-ventilated
place.
If the drilling- milling machine is used in any way other than described above, modified without
the approval of the company Optimum Maschinen Germany GmbH then the CNC machine is
being used improperly.
We will not be held liable for any damages resulting from any operation which is not in accord-
ance with the intended use.
We explicitly point out that any construction, technical or process engineering changes that
have not been approved by Optimum Maschinen Germany GmbH will render the warranty null
and void It is also part of the intended use that you
 observe the limits of the drilling- milling machine,
 the operating manual is observed,
 the inspection and maintenance instructions are observed.
 Technical specification on page 18
WARNING!
Severe injuries due to non-intended use.
It is forbidden to make any modifications or alternations to the operation values of the
drilling- milling. They could endanger the personnel and cause damage to the drilling-
milling machine.
1.4 Reasonably foreseeable misuses

Any use other than that specified under "Intended use" or any use beyond that described will be
deemed non-intended use and is not permissible.
Any other use must be discussed with the manufacturer.
It is only allowed to process metal, cold and non-inflammable materials with the drilling- milling
machine.
In order to avoid misuse, it is necessary to read and understand the operating instructions
before first commissioning.
Operators must be qualified.
MB4_GB_1.fm
EN MB4

1.4.1 Avoiding misuse
 Use of suitable cutting tools.
 Adapting the speed adjustment and feed to the material and workpiece.
 Clamp workpieces firmly and free of vibration.
 Risk of fire and explosion due to the use of flammable materials or cooling lubricants.
Before processing inflammable materials (e.g. aluminium, magnesium) or using inflamma-
ble auxiliary materials (e.g. spirit), you need to take additional preventive measures in order
to avoid health risks.
 When processing plastics, the machine operator must ensure that static electricity gener-
ated during the machining process can be discharged easily.
 When processing carbons, graphite and carbon-fibre-reinforced carbons, the machine is no
longer being used as intended. This causes the warranty to be null and void. When pro-
cessing carbons, graphite and carbon-fibre-reinforced carbons and similar materials, the
machine can be damaged extremely quickly, even if the dusts generated are completely
sucked out during the work process.
ATTENTION!
The workpiece is always to be fixed by a machine vice, jaw chuck or by another
appropriate clamping tool such as for the clamping claws.
WARNING!
Risk of injury caused by flying workpieces.
 Clamp the workpiece in the machine vice. Make sure that the workpiece is firmly clamped in
the machine vice and that the machine vice is firmly clamped onto the machine table.
 Use cooling and lubricating agents to increase the durability of the tool and to improve the
surface quality.
 Clamp the cutting tools and workpieces on clean clamping surfaces.
 Sufficiently lubricate the machine.
 Set the bearing clearance and guides correctly.
Recommendations:
 Insert the drill in a way that it is exactly positioned between the three clamping jaws of the
quick action chuck.
 Clamp end mills (or shank cutters) in a collet chuck using the corresponding collets.
 Clamp end face mills using shell end mill arbors.
When drilling, make sure that
 the suitable speed is set depending on the diameter of the drill,
 the pressure must only be such that the drill can cut without load,
 if there is too much pressure, the drill will wear quickly and may even break or jam in the
borehole. If the drill gets jammed immediately stop the main motor by pressing the emer-
gency stop button,
 use commercial cooling/lubricating agents for hard materials, e.g. steel and
 generally always back the spindle out of the workpiece while it is still turning.
ATTENTION!
Do not use the quick action drill chuck for milling tools. Never clamp a milling cutter into a quick
action drill chuck. Use a collet chuck and appropriate collets for end mills.
When milling, ensure that
 the right cutting speed is selected;
 for workpieces with normal strength values, e.g. steel, 18-22 m/min,
MB4_GB_1.fm
 for workpieces with high strength values, 10-14 m/min,

 the pressure is selected so that the cutting speed remains constant,
MB4 EN

 normal trade coolants/lubricants are used for hard materials.
1.5 Possible dangers caused by the drilling- milling machine

The drilling- milling machine was built using state-of-the-art technology.
Nevertheless, there is a residual risk as the drilling- milling machine operates with
 high speeds,
 circulating parts and tools and
 electrical voltage and currents.
We have used design and safety engineering to minimize the health risk to personnel resulting
from these hazards.
If the drilling-milling machine is used and maintained by personnel who are not duly
qualified, there may be a risk resulting from incorrect or unsuitable maintenance of the drilling-
milling machine.
INFORMATION
Everyone involved in the assembly, commissioning, operation and maintenance must
 be duly qualified,
 and strictly follow these operating instructions.
Always disconnect the drilling- milling machine from the electrical power supply before perform-
ing cleaning or maintenance tasks.
WARNING!
The drilling- milling machine may only be operated with functional safety devices.
Disconnect the drilling- milling machine immediately, whenever you detect a failure in
the safety devices or when they are not fitted!
All additional devices installed by the operator must be equipped with the stipulated
safety devices.
This is your responsibility as the operator!
 Safety devices on page 13
1.6 Personnel qualification
1.6.1 Target group

This manual is addressed to
 operators,
 users and
 maintenance personnel.
Therefore, the warning notes refer to both, operation and maintenance personnel of the drill-
ing- milling machine.
WARNING!
Always disconnect the drilling- milling machine from the electrical power supply. This will pre-
vent it from being used by unauthorized persons.
The qualifications of the personnel for the different tasks are mentioned below:
Operator
The user must have been instructed by the operator about the assigned tasks and possible
risks in case of improper behaviour. The user may only carry out tasks that exceed normal
MB4_GB_1.fm
operation if this is stated in these instructions and the operator has explicitly entrusted him with
the task.
EN MB4

Qualified electrician
With professional training, knowledge and experience as well as knowledge of respective

standards and regulations, qualified electricians are able to perform work on the electrical sys-
tem and recognise and avoid any possible dangers.
Qualified electricians have been specially trained for the working environment, in which they are
working and know the relevant standards and regulations.
Qualified personnel
Due to their professional training, knowledge and experience as well as knowledge of relevant
regulations, qualified personnel are able to perform the assigned tasks and to independently
recognise and avoid any possible dangers.
Instructed person
Instructed persons were instructed by the operating company regarding the assigned tasks and
any possible risks of improper behaviour.
INFORMATION
Everyone involved in the assembly, commissioning, operation and maintenance must
 be duly qualified,
 and strictly follow these operating instructions.
In the event of improper use
 there may be a risk to personnel,
 there may be a risk of damage to the drilling- milling machine and other material values,
 the correct function of the drilling- milling machine may be affected.
1.6.2 Authorized persons
WARNING!
Inappropriate operation and maintenance of the milling machine constitutes a danger to
the personnel, objects and the environment.
Only authorized personnel may operate the milling machine !
Authorized operating and maintenance personnel are specialists instructed and trained by the
operator and the manufacturer.
1.6.3 Obligations of the operating company

The operator must instruct personnel at least once a year in
 all safety regulations relevant to the machine,
 its operation and
 generally accepted engineering standards.
The operator must also
 check the personnel‘s knowledge level,
 document the training/instruction,
 have attendance at the training/instruction confirmed by signature and
 check whether personnel is working in a manner that shows awareness of safety and risks.
 Define and document the machine inspection deadlines in accordance with section 3 of the
Factory Safety Order and perform an operational risk analysis in accordance with section 6
of the Safety at Work Act.
MB4_GB_1.fm
MB4 EN

1.6.4 User's obligations
The user must
 have read and understood the operating instructions,
 be familiar with all safety devices and regulations and
 be able to operate the machine.
1.6.5 Additional requirements regarding qualification

The following additional requirements apply for work on electrical components or equipment:
 They must only be performed by a qualified electrician or person working under the instruc-
tions and supervision of a qualified electrician.
Before starting work on electrical parts or operating agents, the following actions must be taken
in the order given:
 disconnect all poles,
 secure against restarting,
 check that there is no voltage.
1.7 User positions

The user position is in front of the drilling-
milling machine.
Img.1-1: User positions
1.8 Safety measures during operation
CAUTION!
Danger due to inhaling dust and mist that are hazardous to health.
Depending on the materials to be machined and the agents used, dusts and mists can
arise that are detrimental to health.
Ensure that the harmful dust and mist generated are safely sucked off at the point of
origin and routed away from the working area or filtered. To do so, use a suitable
extraction unit.
CAUTION!
Risk of fire and explosion by using flammable materials or cooling lubricants.
Extra precautionary measures must be taken before machining flammable materials (e.g. alu-
minium, magnesium) or using combustible agents (e.g. spirit) to avert a health hazard.
MB4_GB_1.fm
EN MB4

1.9 Safety devices
Use the drilling- milling machine only with properly functioning safety devices.
Stop the drilling- milling machine immediately, if a safety device fails or is faulty or becomes
ineffective.
It is your responsibility!
If a safety device has been activated or has failed, the drilling- milling machine must only be
used if you
 the cause of the fault has been eliminated,
 have verified that there is no danger to personnel or objects.
WARNING!
If you bypass, remove or deactivate a safety device in any other way, you are
endangering yourself and other personnel working with the drilling- milling machine.
The possible consequences are:
 injuries due to components or workpieces flying off at high speed,
 contact with rotating parts and
 fatal electrocution.
The drilling- milling machine features the following safety devices:
 An emergency switching off push button,
 a protective cover on the drilling / milling head.
WARNING!
Although the isolating safety devices provided and delivered with the machine are
designed to reduce the risks of workpieces being ejected or parts of tools or workpieces
breaking off, they cannot eliminate these risks completely. Always work carefully and
observe the limits of the machining process.
1.9.1 Emergency switching off push button

The emergency switching off push but-
ton switches off the drilling-milling
machine.
Emergency
switching off
push button
Img.1-2: Emergency switching off push button
ATTENTION!
The emergency switching off push button immediately stops the operation of the
drilling- milling machine.
Press the emergency switching off push button only if there is a risk! If this push button
is actuated in order to switch off the drilling- milling machine in the standard operation
the tool or workpiece might get damaged.
After having actuated the emergency switching off push button, turn the knob to the
MB4_GB_1.fm
right in order to restart the machine.
MB4 EN

1.9.2 Protective cover
The drilling / milling head is equipped with
a protective cover.
Protective cover
WARNING!
Only remove the protective cover
when the mains plug of the drilling-
milling machine is disconnected.
Img.1-3: Protective cover
1.9.3 Lockable master switch

The lockable master switch can be secured in the "0" position by means of a padlock to guard
against the milling machine being switched on accidentally or by an unauthorised person.
The power supply is cut off when the master switch is in the off position.
Except for the areas marked by the pictogram in the margin.
WARNING!
Dangerous voltage even if the main switch is switched off. The areas marked by the
pictogram might contain live parts, even if the main switch is switched off.
1.9.4 Separation guard

Adjust the guard to the correct height
before you start working.
To do so, slacken the clamping screw, set
the required height and re-tighten the
clamping screw.
There is a switch integrated in the spindle
protection mounting which monitors the
closed position.
INFORMATION
The machine cannot be started, if the spin-
dle protection is not closed.
Img.1-4: Separation guard
1.10 Safety check

Check the drilling- milling machine regularly.
Check all safety devices
MB4_GB_1.fm
 before starting work,

 once a week (with the machine in operation) and
 after all maintenance and repair work.
EN MB4

General check
Equipment Check OK
Guards Mounted, firmly bolted and not damaged
Signs, Installed and legible

Markers
Functional check
Equipment Check OK
Emergency switching off After the emergency switching off push button is pressed, the drilling-
push button milling machine must switch off. It must only be possible to restart the
machine, if the emergency switching off push button is unlocked and the
ON switch has been pressed.
Separation guard around the The drilling- milling machine may switch on only when the guard is
drill and milling spindle closed.
1.11 Personal protective equipment

For certain work, personal protective equipment is required.
Protect your face and your eyes: Wear a safety helmet with facial protection when performing
work where your face and eyes are exposed to hazards.
Wear protective gloves when handling pieces with sharp edges.
Wear safety shoes when you assemble, disassemble or transport heavy components.
Use ear protection if the noise level (emission) in the workplace exceeds 80 dB (A).
Before starting work make sure that the required personal protective equipment is available at
the work place.
CAUTION!
Dirty or contaminated personnel protective equipment can cause illness. It must be
cleaned after each use and at least once a week.
1.12 For your own safety during operation
WARNING!
Before activating the drilling- milling machine, ensure that this will not endanger other
persons or cause damage to equipment.
Avoid any unsafe work methods:
Make sure that your operation does not create a safety hazard.
 The rules specified in these operating instructions must be observed during assembly,
operation, maintenance and repair.
 Use protective glasses!
 Switch off the drilling- milling machine before measuring the workpiece.
 Do not work on the drilling- milling machine, if your concentration is reduced, for example,
MB4_GB_1.fm
because you are taking medication.

 Stay on the drilling- milling machine until the working spindle has come to a complete stand-
still.
MB4 EN

 Use the specified personal protective equipment. Ensure you wear close-fitting clothing
and, if necessary, a hairnet.
 Do not use protective gloves when drilling or milling.
 Disconnect the shock-proof plug from the outlet before replacing the tool.
 Use appropriate agents to remove drilling and milling chips.
 Ensure that your work does not create a safety risk.
 Safely and firmly clamp the workpiece in place, before switching the drilling- milling machine
on.
We provide information about the specific dangers when working with and on the drilling- milling
machine in the descriptions for these types of work.
1.13 Switching-off and securing the drilling- milling machine

Disconnect the mains plug before starting maintenance and repairs.
1.14 Using lifting equipment
WARNING!
The use of unstable lifting and load suspension equipment that might break under load
can cause severe injuries or even death.
Check that the lifting and load suspension equipment are of sufficient load-bearing
capability and are in perfect condition.
Observe the accident prevention regulations issued by your Employers Liability
Insurance Association or other supervisory authorities applicable to your company.
Fasten the loads properly.
Never walk under suspended loads!
1.15 Positions of the symbols on the drilling- milling machine

Make sure that the mandatory and warning symbols are legible.
Img.1-5: Symbols on MB4
1.16 Electronics
Have the machine and/or the electric equipment checked regularly. Immediately eliminate all
defects such as loose connections, defective wires, etc.
A second person must be present during work on live components to disconnect the power in
MB4_GB_1.fm
the event of an emergency. If there is a fault in the power supply, switch off the milling machine
immediately!
EN MB4

Comply with the required inspection intervals in accordance with the factory safety directive,
operating equipment inspection.
The operator of the machine must ensure that the electrical systems and operating equipment
are inspected with regards to their proper condition, namely,
 by a qualified electrician or under the supervision and direction of a qualified electrician,
prior to initial commissioning and after modifications or repairs, prior to recommissioning
 and at certain intervals.
The deadlines must be set so that arising, foreseeable defects can be detected in a timely man-
ner.
The relevant electro-technical rules must be followed during the inspection.
The inspection prior to initial commissioning is not required if the operator receives confirma-
tion from the manufacturer or installer that the electrical systems and operating equipment com-
ply with the accident prevention regulations, see conformity declaration.
Permanently installed electrical systems and operating equipment are considered constantly
monitored if they are continually serviced by qualified electricians and inspected by means of
measurements in the scope of operation (e.g. monitoring the insulation resistance).
1.17 Inspection deadlines

Define and document the inspection deadlines for the machine in accordance with § 3 of the
Factory Safety Act and perform an operational risk analysis in accordance with § 6 of the Work
Safety Act. Also use the inspection intervals in the maintenance section as reference values.
MB4_GB_1.fm
MB4 EN

2 Technical specification
The following information represents the dimensions and indications of weight and the manu-
facturer‘s approved machine data.
Electrical connection
Motor 400V ~ 50Hz / 3Ph. 1,1/ 1,5 kW
optional 400V / 3Ph. ~ 60Hz 1,1/ 1,5 kW

440V / 3 Ph. ~ 60Hz 1,1/ 1,5 kW
230V / 1Ph. ~ 50Hz 1,1 kW
230V / 3Ph. ~ 60Hz 1,1/ 1,5 kW
Drilling-milling capacity
Drilling capacity in steel [mm] max. Ø 28
Drilling capacity in cast [mm] max. Ø 32
Milling capacity end mill [mm] max. Ø 28
Milling capacity milling head [mm] max. Ø 63
Throat [mm] 275
Spindle seat
Spindle seat MT 4
Draw-in rod M16
Spindle sleeve stroke [mm] 120 mm
Drill-mill head
Swivelling + / - 60°
Gear stages 2x6
Z axis travel [mm] 430
Milling table
Table length [mm] 800
Table width [mm] 240
Y axis travel [mm] 195
X axis travel [mm] 450
T - slot size / distance [mm] 14 / 63
Max. load [kg] 80
Dimensions
Height [mm]  Installation plan on page 20
Length [mm]
Width [mm]
Total weight [kg] 320

MB4_GB_2.fm
EN MB4

Work area
Height [mm] 2500
Length [mm] 2000
Width [mm] 2600
Speeds
Gear stage slow [min-1] 95 - 1600
Gear stage rapid [min-1 ] 190 - 3200
Environmental conditions
Temperature 5-35°C
Humidity 25-80%
Operating material
Gear Mobilgear 627, ISO VG 100
Viscosity 100 cSt at 40°C or a comparable oil
about 3,5 litres
Bare steel parts Mobilgrease OGL 007 or,

Mobilux EP 004, acid-free oil, e.g. weapon oil, motor oil
Emissions
The generation of noise emitted by the drilling-milling machine is 76 dB(A) at 80% of max.
speed without tool.
If the drilling- milling is installed in an area where various machines are in operation, the noise
exposure (immission) on the operator of the drilling machine at the working place may exceed
80 dB(A).
INFORMATION
This numerical value was measured on a new machine under the operating conditions specified
by the manufacturer. The noise behaviour of the machine might change depending on the age
and wear of the machine.
Furthermore, the noise emission also depends on production engineering factors, e.g. speed,
material and clamping conditions.
INFORMATION
The specified numerical value represents the emission level and does not necessarily a safe
working level.
Though there is a dependency between the degree of the noise emission and the degree of the
noise disturbance it is not possible to use it reliably to determine if further precaution measures
are required or not.
The following factors influence the actual degree of the noise exposure of the operator:
 Characteristics of the working area, e.g. size or damping behaviour,
 other noise sources, e.g. the number of machines,
 other processes taking place in proximity and the period of time, during which the
operator is exposed to the noise.
Furthermore, it is possible that the admissible exposure level might be different from country to
MB4_GB_2.fm
country due to national regulations.

This information about the noise emission should, however, allow the operator of the machine
to more easily evaluate the hazards and risks.
MB4 EN

CAUTION!
Depending on the overall noise exposure and the basic threshold values, machine
operators must wear appropriate hearing protection.
We generally recommend the use of noise and ear protection.
2.1 Installation plan
320
max. 1420
275
0-460
785
A A
265
1155 775
14
240
800 Schwerpunkt / Centre of gravity
A-A
360
420
600
3
P1
90
MB4_GB_2.fm
400
Img.2-1: Installation plan
EN MB4

3 Delivery, interdepartmental transport, assembly and
commissioning
3.1 Notes on transport, installation, commissioning
Improper transport, installation and commissioning is liable to accidents and can cause damage
or malfunctions to the machine for which we do not assume any liability or guarantee.
Transport the scope of delivery secured against shifting or tilting with a sufficiently dimen-
sioned industrial truck or a crane to the installation site.
WARNING!
Severe or fatal injuries may occur if parts of the machine tumble or fall down from the
forklift truck or from the transport vehicle. Follow the instructions and information on the
transport box.
Note the total weight of the machine. The weight of the machine is indicated in the "Tech-
nical data" of the machine. When the machine is unpacked, the weight of the machine
can also be read on the rating plate.
Only use transport devices and load suspension gear that can hold the total weight of
the machine.
WARNING!
The use of unstable lifting and load suspension equipment that might break under load
can cause severe injuries or even death. Check that the lifting and load suspension gear
has sufficient load-bearing capacity and that it is in perfect condition.
Observe the accident prevention regulations issued by your Employers Liability Insur-
ance Association or other competent supervisory authority, responsible for your com-
pany. Fasten the loads properly.
3.1.1 General risks during internal transport
WARNING: TILTING DANGER!

The machine may be lifted unsecured by a maximum of 2 cm.
Employees must be outside the danger zone, i.e. the reach of the load.
Warn employees and advise them of the hazard.
Machines may only be transported by authorized and qualified persons. Act responsibly during
transport and always consider the consequences. Refrain from daring and risky actions.
Gradients and descents (e.g. driveways, ramps and the like) are particularly dangerous. If such
passages are unavoidable, special caution is required.
Before starting the transport check the transport route for possible danger points, unevenness
and faults.
Danger points, unevenness and disturbance points must be inspected before transport. The
removal of danger spots, disturbances and unevenness at the time of transport by other
employees leads to considerable dangers.
Careful planning of interdepartmental transport is therefore essential.
in-house_transport_en.fm
Delivery, interdepartmental transport, assembly and commissioning EN

3.2 Scope of delivery
INFORMATION
The drilling- milling machine is delivered pre-assembled.
Compare the scope of delivery with the attached packing list.
Check the status of the machine immediately upon receipt and claim possible damages at the
last carrier also if the packing is not being damaged. In order to ensure claims towards the
freight carrier we recommend you to leave the machines, devices and packing material for the
time being in the status at which you have determined the damage or to take photos of this sta-
tus. Please inform us about any other claims within six days after receipt of delivery.
3.3 Set-up and assembly
3.3.1 Installation site requirements

The workplace for operating, maintenance and repair must not be
restricted.
The mains plug of the drilling- milling machine must be freely accessible.
The illumination of the workplace must be designed in such a manner that an illumination of
500 Lux is attained at the tool tip.
If this is not guaranteed with the normal installation site lighting, workplace lights (available as
an option) must be used.
3.3.2 Load suspension point
WARNING!
Danger of crushing and overturning. Proceed carefully when lifting, installing and
assembling the machine.
 Lock all clamping levers on the drilling-milling machine before you lift it.
 Fix the load lifting gear around the drilling-milling head. Use a lifting sling for this purpose.
 Make sure that the attached load does not cause damage to components or paint.
MB4_GB_3.fm
EN MB4

3.3.3 Assembly
 Check that the milling machine foundation is horizontal with a spirit level.
 Check that the foundation has sufficient load-bearing capacity and rigidity.
360
P 13
420
600
36
90
400 40
Img.3-1: Machine base
ATTENTION!
Insufficient rigidity of the foundation leads to the superposition of
the vibrations of the drilling-milling machine and of the underground (natural frequency
of components). If the rigidity of the overall system is insufficient, critical speeds with
annoying vibrations will be reached very quickly and lead to bad milling results.
 Place the drilling- milling machine on the provided foundation.
 Fix the machine base to the substructure through the holes pre-drilled for this purpose.
The attachment points are marked by arrows on the machine base.
WARNING!
The nature of the foundation and type of fixings used to secure the machine base to the
foundation must be capable of absorbing the loads caused by the drilling- milling
machine. The foundation must be level. Check that the drilling- milling machine
foundation is horizontal with a spirit level.
Fix the milling machine to its foundation at the recesses provided on the machine base for this
purpose. We recommend that you use shear connector cartridges or heavy-duty anchors. 
Dimensions on page 18
MB4_GB_3.fm
MB4 EN

3.4 First commissioning
WARNING!
First commissioning may only take place after proper installation.
First commissioned of the milling machine by inexperienced personnel constitute a risk
to personnel and equipment.  Personnel qualification on page 10
We do not accept any liability for damages caused by incorrectly performed
commissioning.
ATTENTION!
Before commissioning the machine, all bolts, fastenings and protections must be
checked and retightened as necessary!
WARNING!
The use of improper tool holders or their operation at inadmissible speeds constitutes a
hazard.
Only use the tool holders (e.g. drill chuck) which were delivered with the machine or
which are offered as optional equipment by OPTIMUM.
Only use tool holders in the intended admissible speed range.
Tool holders may only be modified in compliance with the recommendation of OPTIMUM
or the clamping device manufacturer.
3.4.1 Power supply
CAUTION!
Install the connection cable of the machine in such a way that people will not stumble
over it.
Connect the electrical supply cable.
 Check the fusing (fuse) of your electrical supply according to the technical instructions
regarding the total connected power of the drilling- milling machine.
3.4.2 Cleaning and lubrication

 Remove the anti-corrosive agents which has been applied to the drilling- milling machine for
transport and storage. We recommend you use paraffin for this purpose.
 To clean the drilling- milling machine, do not use any solvents, nitro-cellulose thinner or
other cleaning agents that could damage the paintwork. Observe the cleaning agent manu-
facturer's information and notes.
 Grease all exposed machine parts using an acid-free lubricating oil.
 Lubricate the drilling- milling machine in accordance with the lubrication schedule.
 Inspection and maintenance on page 35
 Check that all spindles are running smoothly. All spindle nuts are re-adjustable.
 Disassemble the V-ledges of the cross table and clean the ledges from the anti-corrosive
agent.  V-ledges on page 37
3.4.3 Filling in gear oil

The drilling- milling machine is delivered without gear oil. Fill in gear oil.
 Oil change on page 36
MB4_GB_3.fm
EN MB4

4 Operation
4.1 Control and indicating elements
15 19
1
16
20 2 2
17
5
18 21
7
3 8
10
6
4
11 9
14
13
12 13
Item Designation Item Designation
1 Draw-in rod cap 2 Rotary selector switch gear stage
3 Meter rule with scale 4 Spindle protection
5 Clamping screw drilling-milling head 6 Star grip for spindle sleeve feed
7 Activation of the fine adjustment 8 Fine adjustment of spindle sleeve
9 Milling head height adjustment hand crank 10 Clamping lever for spindle sleeve
11 Adjustable limit stops 12 Saddle slide Y axis hand crank
13 Clamping lever 14 Cross slide X axis hand crank
15 Operation control light 16 Push button spindle rotation clockwise
17 Push button spindle rotation CCW 18 Push button spindle rotation "OFF"
19 Operating mode selector switch: 20 Drive step switch

 Milling (only with three-phase motors)
MB4_GB_4.fm
 Thread tapping  Thread tapping on 21 Emergency switching off

page 33
MB4 EN

4.2 Safety
The drilling- milling machine must only be operated under the following conditions:
 The drilling- milling machine is in proper working order.
 The drilling- milling machine is used as intended.
 The operating manual is followed.
 All safety devices are installed and activated.
Eliminate or have all malfunctions rectified promptly. Stop the drilling- milling machine immedi-
ately in the event of any abnormality in operation and make sure it cannot be started up acci-
dentally or without authorisation.
 For your own safety during operation on page 15
4.3 Switching on the drilling-milling machine
ATTENTION!
Wait until the drilling-milling machine has come to a complete halt before changing the
rotation direction using the rotation direction switch.
 Select the rotation direction of the drilling-milling machine using the rotation direction
switch.
Two speed stages are available for each rotation direction.
 The marking "R" means clockwise rotation.
 The marking "L" means anticlockwise rotation.
 Press the button "ON".
The drilling-milling machine switches on and turns in the preselected rotation direction.
 Changing the speed range on page 28
4.4 Switching off the drilling-milling machine

 Press the button "OFF" or switch the rotation direction switch to the neutral position.
4.5 Inserting the tool
4.5.1 Installation
CAUTION!
When milling, the seat cone must always be secured with the draw-in rod. A simple
connection with the taper bore of the work spindle without using the draw-in rod is not
permissible for milling. The cone connection is released by lateral pressure. Injuries may
be caused by parts flying off.
MB4_GB_4.fm
EN MB4

The milling head is fitted with an M12
draw-in rod.
 Remove the cap. Draw-in rod
 Clean the seat in the spindle / quill.
 Clean the cone of your tool.
 Insert the tool in the spindle / quill.
 Screw the draw-in bar in the tool.
 Tighten the tool with the draw-in rod
and hold the spindle on the counter
bearing by means of a wrench.
Counter bearing
Img.4-1: Drilling-milling head without cap
4.5.2 Removal
 Hold the spindle counter bearing with a wrench and loosen the draw-in rod. Continue turn-
ing the draw-in rod, so that the tool is squeezed out from the conical seat.
ATTENTION!
When using an MT spindle.
When installing a cold Morse taper into a heated-up machine those MT collets are
subject
to shrinking on the Morse taper contrary to the quick-release tapers.
4.5.3 Use of collets

If collets are used to house milling tools, higher machining tolerance can be achieved. The
collet may easily and quickly be changed for a smaller or larger end mill with no need to remove
the complete tool. The collet is pressed into the ring of the swivel nut and must rest there by
itself. The milling cutter is clamped by fastening the swivel nut on the tool. Make sure that the
correct collet is used for each milling cutter diameter, so that the milling cutter may be fastened
securely and firmly.
4.6 Clamping the workpieces
CAUTION!
Injuries can be caused by parts flying off.
The workpiece is always to be fixed by a machine vice, jaw chuck or by another
appropriate clamping tool such as for the clamping claws.
MB4_GB_4.fm
MB4 EN

4.7 Changing the speed range
ATTENTION!
Wait until the drilling-milling machine has come to a complete halt before changing the
speed using the gear switch.
There are two levers to switch over the gear to the desired spindle speed at the front side of the
machine. The following speeds are available in depending the used electric motor drive stage.
4.7.1 Speed table three-phase drive
Img.4-2: Speed table
MB4_GB_4.fm
EN MB4

4.7.2 Speed table one-phase drive
Img.4-3: Speed table
4.8 Selecting the speed

The correct speed is an important factor for milling. The speed determines the cutting speed by
which the cutting edges cut the material. The service life of the tool can be increased and the
working result optimized by selecting the correct cutting speed.
The ideal cutting speed basically depends on the workpiece and the tool material. Higher
speeds are possible with tools (mills) made from hard metal or cutting ceramics than with tools
made from high-alloy high speed steel (HSS). You will achieve the ideal cutting speed by
selecting the correct rotation speed.
Please refer to the following standard values or a table reference book (e.g. Tabellenbuch
Metall, Europa Lehrmittel, ISBN 3808517220) to determine the correct cutting speed for your
tool and the material to be cut.
The required speed is calculated as follows:
V
n = ------------
d
n = speed in rpm(revolutions per minute)
V = cutting speed in m/min (metres per minute)
d = tool diameter in m (metres)
MB4_GB_4.fm
MB4 EN

4.8.1 Standard values for cutting speeds
[m/min] with high-speed steel and hard metal for upcut milling.
Al
Tool Steel Grey cast iron alloy
case-hardened
Plain milling cutters and shell end mills 10 - 25 10 - 22 150 - 350
[m/min]
Relieved milling cutters [m/min] 15 - 24 10 - 20 150 - 250
Cutter head with SS [m/min] 15 - 30 12 - 25 200 - 300
Cutter head with HM [m/min] 100 - 200 30 - 100 300 - 400
This results in the following standard speeds, dependent on

mill diameter, mill type and material.
Al alloy
Tool diameter Steel Grey cast iron case-hardened
[mm] plain milling cutters and 10 - 25 m/min 10 - 22 m/min 150 - 350
shell end mills m/min
Speed [rpm]
35 91 - 227 91 - 200 1365 - 3185
40 80 - 199 80 - 175 1195 - 2790
45 71 - 177 71 - 156 1062 - 2470
50 64 - 159 64 - 140 955 - 2230
55 58 - 145 58 - 127 870 - 2027
60 53 - 133 53 - 117 795 - 1860
65 49 - 122 49 - 108 735 - 1715
Al alloy
Tool diameter Steel Grey cast iron case-hard-
[mm] 15 - 24 m/min 10 - 20 m/min ened 150 - 250
Form mills m/min
Speed [rpm]
4 1194 - 1911 796 - 1592 11900 - 19000
5 955 - 1529 637 - 1274 9550 - 15900
6 796 - 1274 531 - 1062 7900 - 13200
8 597 - 955 398 - 796 5900 - 9900
10 478 - 764 318 - 637 4700 - 7900
12 398 - 637 265 - 531 3900 - 6600

MB4_GB_4.fm
14 341 - 546 227 - 455 3400 - 5600
16 299 - 478 199 - 398 2900 - 4900
EN MB4

4.8.2 Standard values for speeds with HSS – Eco – twist drills
Cooling
Drill diameter
Material 3)
2 3 4 5 6 7 8 9 10
1)
Steel, unalloyed, n 5600 3550 2800 2240 2000 1600 1400 1250 1120
E
up to 600 N/mm2 f 2) 0.04 0.063 0.08 0.10 0.125 0.125 0.16 0.16 0.20
Mild steel, alloyed, tempered, n 3150 2000 1600 1250 1000 900 800 710 630
E/oil
up to 900N/mm2 f 0.032 0.05 0.063 0.08 0.10 0.10 0.125 0.125 0.16
Mild steel, alloyed, tempered, n 2500 1600 1250 1000 800 710 630 560 500
Oil
up to 1200 N/mm2 f" 0.032 0.04 0.05 0.063 0.08 0.10 0.10 0.125 0.125
Stainless steels up to 900 N/ n 2000 1250 1000 800 630 500 500 400 400
mm2 Oil
e.g. X5CrNi18 10 f 0.032 0.05 0.063 0.08 0.10 0.10 0.125 0.125 0.16
1): Speed [n] in rpm

2): Feed [f] in mm/rev
3): Cooling: E = Emulsion; oil = cutting oil
 The above data are standard values. In some cases it may be advantageous to increase or
decrease these values.
 A cooling or lubricating agent should be used when drilling.
 For stainless materials (e.g. VA – or NIRO steel sheets) do not centre, as this will result in
the material compacting and the drill bit rapidly becoming blunt.
 The workpieces need to be tensed inflexibly and stably (vice, screw clamp).
INFORMATION
Friction during the cutting process causes high temperatures at the cutting edge of the tool. The
tool should be cooled during the milling process. Cooling the tool with a suitable cooling lubri-
cant ensures better working results and a longer edge life of the cutting tool.
INFORMATION
Use a water-soluble environmentally friendly emulsion as cooling lubricant procured from a spe-
cialist retailer.
Make sure that the cooling lubricant is properly absorbed. Respect the environment when dis-
posing of lubricants and coolants. Follow the manufacturer’s disposal instructions.
4.9 Manual spindle sleeve feed with the fine feed

 Turn the handle screw.
Handle screw
The spindle sleeve lever moves in
direction of the drilling-milling head
and activates the coupling of the fine Fine feed
feed.
 Turn the spindle sleeve fine feed in
order to move the spindle sleeve.
Img.4-4: Handle screw

MB4_GB_4.fm
MB4 EN

4.10 Manual spindle sleeve feed with the spindle sleeve lever
ATTENTION!
The clutch of the fine feed has to be disengaged before the spindle sleeve lever can be
used. Activating the spindle sleeve lever when the fine feed is engaged may damage the
clutch.
 Loosen the handle screw  „Img.4-4: Handle screw“ on page 31. The sleeve lever moves
away from the drilling head and deactivates the coupler of the fine feed.
4.10.1 Drill depth stop

Use the drilling depth stop when drilling
several holes of the same depth.
Indicator drilling
depth
Adjusting screw
for
drill depth stop
Img.4-5: Drill depth stop
4.11 Swivelling the drill-mill head

The drill-mill head may be swivelled to
the right and to the left. There three
screws are to loosen.
 Turn the drill-mill head to the desired Clamping bolts
position.
 Retighten the fastening screws.
ATTENTION!
It is possible to slew the drill mill head
much further. By continuing to swing
gear oil can leak.
Img.4-6: Clamping bolts
CAUTION!
If the screws are completely unfastened, the drill mill head might fall down.
When slewing the working head, only unfasten the screws as far as necessary to be
ableto perform the settings. After having set the slewing angle, retighten the fixing
screws.
MB4_GB_4.fm
EN MB4

4.12 Thread tapping
19
16
17
22
7
23
25
Img.4-7: Thread tapping
Item Designation Item Designation

22 Cycle end limit switch 19 Operating mode selector switch
23 Turning direction reversal switch 16 Spindle rotation direction push button
25 Depth stop 17
Activation of fine adjustment of spindle

7
sleeve
 Set the operating mode selector switch (19) to threading.
 Set the depth stop (25) to the desired depth.
 Select the lowest speed.  Changing the speed range on page 28
 Switch the rotation of the spindle on. Note the correct direction of rotation (16) or (17).
 Move the sleeve downward with the sleeve lever until the machine tap cams in the work-
piece.
The machine tap turns into the workpiece. As soon as the preset depth is attained, the spindle
reverses the direction of rotation at the switch point (23). The machine tap turns out of the work-
piece. When the sleeve is completely entered up to the switch point (22) the rotation of the
spindle is stopped. Then it is possible to proceed another threading operation.
ATTENTION!
Before proceeding another threading cycle, the sleeve must be completely entered in order to
trigger the switch point (22).
The activation of fine adjustment of spindle sleeve (7) must be disabled.
MB4_GB_4.fm
MB4 EN

5 Maintenance
In this chapter you will find important information about
 Inspection
 Maintenance
 Repair
of the drilling- milling machine.
ATTENTION!
Properly performed regular maintenance is an essential prerequisite for
 operational safety,
 failure-free operation,
 long service life of the drilling- milling machine and
 the quality of the products which you manufacture.
Installations and equipment from other manufacturers must also be in good order and condition.
5.1 Safety
WARNING!
The consequences of incorrect maintenance and repair work may include:
 extremely serious injuries to those working on the drilling- milling machine and
 damage to the drilling- milling machine.
Only qualified personnel should carry out maintenance and repair work on the drilling-
milling machine.
5.1.1 Preparation
WARNING!
Only work on the drilling- milling machine if it has been disconnected from the power
supply.
 Switching-off and securing the drilling- milling machine on page 16
Attach a warning label.
5.1.2 Restarting
Before restarting, run a safety check.
 Safety check on page 14
WARNING!
Before starting the drilling- milling machine, you must check that there is no danger for
persons and that the drilling- milling machine is not damaged.
MB4_GB_5.fm
EN MB4

5.2 Inspection and maintenance
The type and level of wear depends to a large extent on the individual usage and operating
conditions. Any indicated intervals therefore are only valid for the corresponding approved con-
ditions.
Interval Where? What? How?
  Safety check on page 14

Start of work,
after every
maintenance
or repair work
 Oil all guide rails.

Dovetail guides
Start of work,
after every Oiling
maintenance
or repair work
 Oil all bare steel surfaces. Use an acid-free oil, e.g.

Milling table
weapon oil or motor oil.

Every week Oiling
 Check the oil level of the gear. The oil level must be in the
middle of the sight glass.
Gear of milling head
Oil sight glass
Weekly Oil level
Abb.5-1: Oil sight glass speed gear

MB4_GB_5.fm
MB4 EN

 For oil change use an appropriate collecting tray of suffi-

cient capacity.
 Have the drilling-milling machine run for a few minutes, the
oil will heat up and will slightly penetrate from the opening.
 Remove the oil drain plug.
 Operating material on page 19
Oil drain plug

Gear of milling head
First after 200

operating
hours, then
Oil change
every 2000
operating
hours
Gear ventilation/
Filler hole
Abb.5-2: Milling head
 Lubricate all oiler cups with machine oil, do not use grease
guns or the like.
 Operating material on page 19
Oiler
Weekly Oiling cup
Img.5-3: Oiler cup
 Lubricate all oiler cups with machine oil, do not use grease
Oiler cup
MB4_GB_5.fm
Every month Oiling guns or the like.
EN MB4

 Clamp the milling head.
Adjustment Z axis
 Remove the service cover from the column.
Every six
Lubricate
 Lubricate the gearwheels.
months
Increased gap in the milling table spindles can be reduced by

Spindle nut cross table
resetting the spindle nuts. The spindle nuts are reset by reduc-
ing the thread flanks of the spindle nut by means of a take-up
screw. After the reset, it is necessary to check if there is still
When neces- smooth movement over the entire path, otherwise wear is con-
Readjusting
sary siderably increased due to friction between the spindle nut and
the spindle. The regulating screw of the spindle nut of the Y
axis is accessible from the rear side, the regulating screw of
the spindle nut of the x axis is accessible from the right or left
side of the milling table.
Milling table
Adjusting screw screw V-ledge

X axis right side
Adjusting screw screw V-ledge

V-ledges
When neces- Readjusting Y axis front

sary X and Y axis
Abb.5-4: Milling table

 Turn the adjusting screw of the corresponding V-ledge
clockwise. The V-ledge is pushed further inward thus
reducing the play in the guide rail.
 Check the settings. The corresponding guide rail must be
more easily movable but ensure stable guidance.
 Proceed as described under "Readjusting X and Y axis".

V-ledges
When neces- Readjusting

sary Z axis
INFORMATION
The spindle bearing is lifetime-lubricated. It is not necessary to lubricate it again.
MB4_GB_5.fm
MB4 EN

5.3 Repair
5.3.1 Customer service technician

For any repair work request the assistance of an authorised customer service technician. Con-
tact your specialist dealer if you do not have customer service's information or contact Stürmer
Maschinen GmbH in Germany who can provide you with a specialist dealer's contact informa-
tion. Optionally, the
Stürmer Maschinen GmbH
Dr.-Robert-Pfleger-Str. 26
D- 96103 Hallstadt
can provide a customer service technician, however, the request for a customer service techni-
cian can only be made via your specialist dealer.
If the repairs are carried out by qualified technical personnel, they must follow the indications
given in these operating instructions.
Optimum Maschinen Germany GmbH accepts no liability nor does it guarantee against damage
and operating malfunctions resulting from failure to observe these operating instructions.
For repairs, only use
 faultless and suitable tools,
 original parts or parts from series expressly authorised by Optimum Maschinen Germany
GmbH.
MB4_GB_5.fm
EN MB4

6 Ersatzteile - Spare parts
6.1 Ersatzteilbestellung - Ordering spare parts
Bitte geben Sie folgendes an - Please indicate the following :
 Seriennummer - Serial No.
 Maschinenbezeichnung - Machines name
 Herstellungsdatum - Date of manufacture
 Artikelnummer - Article no.
Die Artikelnummer befindet sich in der Ersatzteilliste. The article no. is located in the spare
parts list. Die Seriennummer befindet sich am Typschild. The serial no. is on the rating plate.
6.1.1 Wichtiger Hinweis - Important note
INFORMATION
Um Ihnen eine erfolgreiche Ersatzteilversorgung zu ermöglichen, ist es zwingend erforderlich
die Seriennummer Ihrer Fräsmaschine zu erhalten. Ihre MB4 Fräsmaschine kann sich erheblich
in diversen Teilen und deren Kompatibilität zu anderen MB4 Fräsmaschinen unterscheiden.
Bitte haben Sie Verständnis dafür, dass ansonsten eine erfolgreiche Ersatzteilversorgung für
Ihre MB4 Fräsmaschine nicht möglich ist.
In order to enable a successful spare parts supply, it is absolutely necessary to obtain the serial
number of your milling machine. Your MB4 milling machine can differ considerably in various
parts and their compatibility with other MB4 milling machines. Please understand that other-
wise a successful spare parts supply for your MB4 milling machine is not possible.
6.2 Hotline Ersatzteile - Spare parts Hotline
+49 (0) 951-96555 -118

ersatzteile@stuermer-maschinen.de
6.3 Service Hotline
+49 (0) 951-96555 -100

service@stuermer-maschinen.de
milling-parts-preface_MB4_DE-GB.fm
Ersatzteile - Spare parts DE | EN
39
6.4 Fräskopf 1 von 6 - Milling head 1 of 6
A B C D
Abb.6-1: Fräskopf 1 von 6 - Milling head 1 von 6

MB4_parts.fm
DE | EN MB4
40 Originalbetriebsanleitung Version 1.1.1 - 2021-1-25

23
20
21
25
58
78
24
81
B
157
156
30
26
14
19
155
41
6
5
4
2
7
8
9
18
A
353
353
22
14
12
13
10
17
16
MB4_parts.fm
MB4 DE | EN
Version 1.1.1 - 2021-1-25 Originalbetriebsanleitung 41

113
19
32
33
D
128
31
12
12
110
19
27
C
23
29
28
82
24
26
25
85
96
MB4_parts.fm
DE | EN MB4

E 69
72 70
68
112 67
83 71
97
98
76
75
74
F 68
73
112 72
83
97
98

MB4_parts.fm
MB4 DE | EN

48
77
45
103
35
44
47
46
50
37
25
51
18
92
52
36
49
92
40
38
39
130
42
43
MB4_parts.fm
DE | EN MB4

126
125 34
79
114 80 129
129
100
89 11
84
1
106
127 107
64
102
98
127 101
60
90 62 63
91 56 59
55
57
65 61
66

MB4_parts.fm
MB4 DE | EN

6.10 Fräsfutterschutz - Milling chuck protection
Abb.6-7: Fräsfutterschutz - Milling chuck protection

MB4_parts.fm
DE | EN MB4

6.11 Schaltbox - Switch box
130
132
133
131
139
138 134
137
135
137
136
Abb.6-8: Schaltbox - Switch box
MB4 - Teileliste Fräskopf - Parts list milling head
Menge Grösse Artikelnummer

Pos.
Bezeichnung Designation
Qty. Size Item no.
1 Gehäuse Housing 1
2 Pinole Sleeve 1 0303434002
CPL Pinole komplett Sleeve complete 1 0303434002CPL
3 Dichtung Seal 1 0303434003
4 Kegelrollenlager Taper roller bearing 1 30207 J2Q 04033009
5 Frässpindel Milling spindle 1 0303434005
6 Klemmmutter Clamping nut 1 0303434006
7 Kegelrollenlager Taper roller bearing 1 30206 J2_Q 04033007

MB4_parts.fm
8 Nutmutter Grooved nut 1
9 Sicherungsscheibe Safety washer 1 DIN 981 - MB6.4
10 Zahnrad Gear 1 0303434010
MB4 DE | EN

11 Platte Plate 1 0303434011
12 Kugellager Ball bearing 3 6007-2Z 0406007R
13 Sicherungsring Retaining ring 1 DIN 472 - 62 x 2 042SR62I
14 Passfeder Fitting key 2 DIN 6885/5x5x14 042P5516
16 Sicherungsring Retaining ring 1 DIN 471 - 35x1,5 042SR35I
18 Innensechskantschraube Hexagon socket screw 5 ISO 4762 - M5x12
19 Kugellager Ball bearing 3 6202-2Z 0406202R
20 Welle Shaft 1 0303434020
21 Passfeder Fitting key 1 DIN 6885 - 5x5x45 042P5550
22 Zahnrad Gear 1 0303434022
23 Passfeder Fitting key 2 DIN 6885/5x 5x50 042P5550
24 Sicherungsring Retaining ring 2 DIN 471 - 18x1,2 042SR18W
25 Kugellager Ball bearing 3 6003 0406003R
26 Sicherungsring Retaining ring 2 DIN 472 - 35 x 1,5 042SR35W
27 Welle Shaft 1 0303434027
28 Passfeder Fitting key 1 DIN 6885 - 5 x 5 x 25
29 Passfeder Fitting key 1 DIN 6885 - 5 x 5 x 12 042P5512
30 Zahnrad Gear 1 0303434030
31 Abstandring Spacer ring 1 0303434031
32 Welle Shaft 1 0303434032
34 Motor Motor 1 0303434034
35 Gehäuse Housing 1 0303434035
36 Flansch Flange 1 0303434036
37 Welle Shaft 1 0303434037
38 Schraube Screw 3 ISO 10642 - M6x20
39 Gehäuse Housing 1 0303434039
40 Feder Spring 1 0303434040
41 Zahnrad Gear 1 0303434041
42 Buchse Bush 1 0303434042
43 Schraube Screw 1 0303434043
44 Schneckenrad Worm gear 1 0303434044
45 Nabe Handle base 1 0303434045
47 Innensechskantschraube Hexagon socket screw 6 ISO 4762 - M8 x 20
48 Griffschraube Screw 1 0303434048
49 Handrad Handle 1 0303434049
50 Welle Shaft 1 0303434050
51 Flansch Flange 1 0303434051
52 Skalenring Scale ring 1 0303434052
53 Griff Grip 1 0303434053
54 Griffschraube Grip screw 1
55 Klemmbolzen Clamping bolt 1 0303434055

MB4_parts.fm
56 Klemmbolzen Clamping bolt 1 0303434056
57 Schraube Screw 1
DE | EN MB4

58 Zahnrad Gear 1 0303434058
59 Halter Holder 1 0303434059
60 Innensechskantschraube Hexahon socket screw 1 ISO 4762 - M8 x 30
61 Buchse Bushing 1 0303434061
62 Sechskantmutter Hexagon screw 1
63 Gewindestange Graduated rod 1 0303434063
64 Endanschlag Limited block 1 0303434064
65 Spannstift Spring pin 1 3 X 16
66 Schraube Screw 1 0303434066
67 Welle Shaft 1 0303434067
68 Scheibe Washer 4 DIN 125 - A 13
69 Schalthebel Control lever 1 0303434069
70 Platte Plate 1 0303434070
73 Welle Shaft 1 0303434073
74 Schalthebel Control lever 1 0303434074
75 Hülse Sleeve 1 0303434075
76 Platte Plate 1 0303434076
77 Hebel Lever 3 03338430227
78 Zahnrad Gear 1 0303434078
79 Abdeckung Cover cap 1 0303434079
80 Innensechskantschraube Hexagon screw 6 ISO 4762 - M8 x 55
81 Zahnrad Gear 1 0303434081
82 Zahnrad Gear 1 0303434082
83 Dichtung Seal 2 12x22x7 04112227
84 Ölschauglas Oil glass 1 0343143
85 Zahnrad Gear 1 0303434085
89 Label Label 1 0333845089
90 Hebel Lever 1 0303434090
92 Gewindestift Grub screw 2 ISO 4026 - M6 x 12
96 Zahnrad Gear 1
97 Schaltknopf Control knob 2 0303434097
98 Zeiger Indicator 3 034009231113
100 Sechskantschraube Hexagon screw 1 03034340100
101 Innensechskantschraube Hexahon socket screw 1 ISO 4762 - M3 x 16
102 Scheibe Washer 1 DIN 125 - A 3,2
103 Feder Spring 1 03034340103
106 Zeiger Indicator 2 03034340106
107 Niet Rivet 4
110 Zahnrad Gear 1 03034340110
112 Spannstift Spring pin 2 ISO 8752 - 5 x 40
113 Zahnrad Gear 1 03034340113

MB4_parts.fm
114 Anzugstange Drawin bar 1 03034340114
115 Innensechskantschraube Socket head screw 1 GB 70-85 - M6 x 10
MB4 DE | EN

116 Scheibe Washer 1
117 Innensechskantschraube Socket head screw 2 GB 70-85 - M6 x 16
118 Rändelschraube Knurled screw 1
119 Halterung Fixture 1 0302024149CPL
120 Mikroschalter Microswitch 1 030031712018
121 Platte Plate 1
122 Alu- Profil Aluminium profile 1
123 Bohrfutterschutz Drill chuck protection 1 0302024153CPL
124 Schraube Screw 2 GB819-85/M5x8
125 Lüfter Fan 1
126 Deckel Cover 1

JUCHE LXW16-16/
127 Mikroschalter Micro switch 2
51C
128 Dichtung Seal 2 35x45x10 041354510
129 Stopfen Plug 2

03338450129
130 Schaltbox Switch box 1
03338450130
131 Abdeckung Cover 1
03338450131
132 Frontabdeckung Front cover 1
03338450132
133 Wahlschalter Mode switch 1
03338450133
134 Drehrichtungsschalter Change over switch 1
03338450134
135 Not-Halt-Schalter Emergency stop button 1
03338450135
136 Taster Aus Button Off 1
03338450136
137 Taster Drehrichtung Button of rotation 2
03338450137
138 Taster Steuerung Ein Button control On 1
03338450138
139 Hauptschalter Main switch 1
03338450139
155 Gewindestift Grub screw 1
03338450155
156 Stahlkugel Steel ball 1
03338450126
157 Feder Spring 1
03338450157
MB4_parts.fm
DE | EN MB4

6.12 Säule - Column
17
16
6
60 14
15
4
26 22
27
22
62
71
73 72 6
19
68 59-1 54 56 25
59
61 74 23
57
70 65 55
57
69 58 24
65
61
62 2
64 56
63 66 67
64
MB4_parts.fm
Abb.6-9: Säule - Column
MB4 DE | EN

52
DE | EN
6.13
MB4
42 44 19 20
21 31 36
13
12 9
11 10
40 32
6 41
Kreuztisch - Cross table
48 37 53
50 21
18 51 31
45 20
35
19
7
Abb.6-10: Kreuztisch - Cross table

6 44
22 39 42
43 7
10
47 22 9
52 46 6
6 8
22 21
22 11
3 7 12
20
Originalbetriebsanleitung
11 19 13
9 45 75
38
44 31
42 7
10
13 1
12
MB4_parts.fm
Version 1.1.1 - 2021-1-25

MB4 - Ersatzteilliste Kreuztisch - Spare parts list cross table
Designation Menge Grösse Artikelnummer

Pos.
Bezeichnung
Qty. Size Item no.
1 Maschinenfuss base 1
2 Säule column 1
3 Flansch square flange 1
4 Führung Guide 1
5 Keilleiste gib strip 1 03338460305
6 Schaube screw 3
7 Kugellager bearing 4
8 Spindel table screw 1 03338460308
9 Kupplung dial clutch 2
10 Skalenring Skale ring 2
11 Handrad wheel 3 03338460311
12 Handhebel Hanadle lever 3 03338460312
13 Schraube screw 3 0333812057-1
14 Spindelmiutter Spindle nut 1
15 Halter nut bracket 1
16 Abdeckung cover 1
17 Schraube screw 3 M8x20
19 Stift pin 3 5x35
20 Schraube screw 2
21 Schmiernippel oil cup 3 8 0340114
22 Klemmhebel fixed handle 6 03338460322
23 Scheibe washer 4 16
25 Schraube Screw 4 M16x60
26 Scheibe washer 1
31 Stift pin 6 8x30
32 Anschluss Plug 1
33 Platte Plate 1
35 Schlitten Slide 1
36 Frästisch table 1
37 Spindelmutter table nut 1 03338460337
38 Spindelmutter table base nut 1 03338460338
39 Flansch right flange 1
40 Flansch left flange 1
41 Spindel table screw 1 03338460341
43 Anzeige Dial clutch 1

MB4_parts.fm
MB4 DE | EN

50 Block movable fixed block 2 0333812013
51 Anschlag fixed block support 2 0333812062
54 Lagerbock Lagerbock 1
55 Welle shaft 1 03338460355
56 Zahnrad gear 2 03338460356
57 Kugellager bearing 2 6004.2Z 0406004ZZ
58 Sicherungsring retaining ring 1
59 Flansch flange 1
59-1 Kupplung Clutch 1
60 Spindel Spindle 1 03338460360
61 Kugellager bearing 2 51104 04051104
62 Passfeder key 2 6x20 042P6620
63 Sicherungsring lock washer 1 20 042SR20W
64 Klemmmutter lock nut 1 M20x1,5
66 Scheibe Washer 2
68 Schraube screw 1 03338460368
69 Handhebel turn handle 1
70 Schraube Screw 1
72 Scheibe Washer 3 14
73 Sechskantmutter Hexagon nut 3 M14
74 Faltenbalg Bellow 1 03338450640
Faltenbalg Bellow 1 oder / or 03338450641

75
Gummiabdeckung Rubber cover 1 oder / or 03338165346
MB4_parts.fm
DE | EN MB4

6.14 Maschinenschilder - Machine labels
3 7
6
Abb.6-11: Maschinenschilder - Machine labels
Ersatzteilliste Maschinenschilder - Spare part list machine labels

Pos.
Qty. Size Article no.
1 Schild Frontabdeckung Front cover lable 1
2 Schild Steuerbox Control box cover 1
3 Schild Hauptschalter Main switch lable 1
4 Schild Motor Motor Lable 1
5 Maschinenschild Machine lable 1
6 Schild Sicherheit Safety lable 1
7 Schild Sicherheit Safety lable 1

MB4_parts.fm
MB4 DE | EN

6.15 Schaltplan Drehstromantrieb - Wiring diagram three-phase drive
MB4_parts.fm
DE | EN MB4

6.15.1 Teileliste Elektrik - Parts list electrical components - 400V
MB4 - Elektrik - Electrical components - 400V

Pos.
Qty. Size Item no.
Sicherheitschalter
1B5 Mill chuck safety switch 1
Frässchutz
1B7.1 Endschalter oben Top end switch 1
1B7.2 Endschalter unten Below end switch 1
1F0 Schutzschalter Safety switch 1
1F3 Sicherung Fuse 1
1F4.1 Sicherung Fuse 1
1F4.2 Sicherung Fuse 1
1H4 Lampe Betriebsleuchte Work light lamp 1
1M1 Motor Motor 1
1Q7 Motorschütz Motor contactor 1
1Q8 Motorschütz Motor contactor 1
1S1 Drehrichtungsschalter Rotation switch 1
1S4 NOT-Halt Schalter Emergency stop button 1
1S5 Taster Ein Button ON 1
1S6 Taster Vorwärts Button forward 1
1S7 Taster Rückwärts Buton reverse 1
1S7.1 Funktionsschalter Mode switch 1
1S7.2 Taster Aus Button OFF 1
1T3 Transformator Transformer 1
K1 Steuerrelais Control relay 1

MB4_parts.fm
MB4 DE | EN

6.16 Schaltplan einphasiger Antrieb - Wiring diagram one-phase drive
MB4_parts.fm
DE | EN MB4

6.16.1 Teileliste Elektrik - Parts list electrical components - 230V
MB4 - Elektrik - Electrical components - 230V

Pos.
Qty. Size Item no.
SQ1 Sicherheitschalter Frässchutz Mill chuck safety switch 1
SQ2 Endschalter oben Top end switch 1
SQ3 Endschalter unten Below end switch 1
1F0 Schutzschalter Safety switch 1
F1 Sicherung Fuse 1 2A
HL Lampe Betriebsleuchte Work light lamp 1
M1 Motor Motor 1
KM1 Motorschütz Motor contactor 1
KM2 Motorschütz Motor contactor 1
SB1 NOT-Halt Schalter Emergency stop button 1
SB2 Taster Ein Button ON 1
SB4 Taster Vorwärts Button forward 1
SB5 Taster Rückwärts Buton reverse 1
SA1 Funktionsschalter Mode switch 1
SB3 Taster Aus Button OFF 1
TC Transformator Transformer 1
KA1 Steuerrelais Control relay 1
KT Zeitrelais Time relay 1

MB4_parts.fm
MB4 DE | EN

7 Malfunctions
7.1 Milling machine malfunctions
Cause/
Malfunction Solution
possible effects
Milling machine cannot be • Power-on sequence not observed. •  Switching on the drilling-mill-
switched on ing machine on page 26
• Have it checked by qualified per-
sonnel.
Tool "burnt". • Incorrect speed. • Choose a different speed, exces-

sive feed.
• Chips are not coming out of the • Withdraw the tool more frequently.
drilled hole.
• Blunt tool. • Sharpen or replace tool.
• Use coolant.
• Operating without cooling agent.
Taper cannot be inserted in • Remove any dirt, grease or oil • Clean surfaces well.
quill. from the internal conical surface of Keep surfaces free from grease.
the spindle sleeve or the taper.
The taper cannot be pushed • MT4 taper is shrinked on the • Let the machine run at highest
out. Morse taper. speed for two minutes to warm it
up and attempt to remove the
taper again.
Motor does not start. • Defective fuse. • Have it checked by qualified per-
sonnel.
Rattle the spindle if the • Upcut mill machining not possible • Perform conventional milling.
workpiece surface is rough. under the current operating condi-
tions. • Tighten the clamping lever.
• Clamping lever of the movement
axes not tightened. • Check, re-tighten.
• Loose collet, loose drill chuck,
draw-in rod loose. • Sharpen or renew the tool.
• Tool is blunt. • Clamp the workpiece firmly.
• The workpiece is not fastened. • Readjust the bearing slack or
• Excessive slack in bearing. replace the bearing.
• Readjust the bearing slack or
• Spindle moves up and down. replace the bearing.
Fine feed of the spindle • Fine feed is not correctly activated. •  Manual spindle sleeve feed
sleeve does not work with the fine feed on page 31
• Clean, replace.
• Coupling of the fine feed does not
cam-in, is soiled, blurred, worn,
defective
MB4_GB_7.fm
EN MB4

8 Appendix
8.1 Copyright
This document is protected by copyright. All derived rights are reserved, especially those of
translation, re-printing, use of figures, broadcast, reproduction by photo-mechanical or similar
means and recording in data processing systems, either partial or total.
Subject to technical changes without notice.
8.2 Terminology/Glossary
Term Explanation
Milling table Supporting surface, clamping surface for the workpiece with traverse in
X and Y directions
Taper mandrel Tool housing taper, drill taper, drill chuck taper.
Workpiece piece to be milled, drilled or machined.
Draw-in rod Threaded rod to fix the taper mandrel in the quill.
Drill chuck Drill bit adapter
Collet Holder for end mill
Drill-mill head Upper part of the milling machine
Spindle sleeve Hollow shaft in which the milling spindle turns.
Milling spindle Shaft activated by the motor
Drilling table Supporting surface, clamping surface
Taper mandrel Cone of the drill or of the drill chuck
Quill lever Manual operation for the drill feed
Quick action - drill chuck Drill bit adapter can be fixed by hand.
Workpiece Part to be drilled, part to be machined.
Tool Milling cutter, drill bit, etc.

MB4_GB_8.fm
MB4 EN

8.3 Liability claims/warranty
Besides the legal liability claims for defects of the customer towards the seller, the manufac-
turer of the product, OPTIMUM GmbH, Robert-Pfleger-Straße 26, D-96103 Hallstadt, does not
grant any further warranties unless they are listed below or were promised as part of a single
contractual provision.
Liability or warranty claims are processed at OPTIMUM GmbH's discretion either directly or
through one of its dealers.
Any defective products or components of such products will either be repaired or replaced by
components which are free from defects. Ownership of replaced products or components is
transferred to OPTIMUM Maschinen Germany GmbH.
The automatically generated original proof of purchase which shows the date of purchase, the
type of machine and the serial number, if applicable, is the precondition in order to assert liabil-
ity or warranty claims. If the original proof of purchase is not presented, we are not able to per-
form any services.
Defects resulting from the following circumstances are excluded from liability and warranty
claims:
 Using the product beyond the technical options and proper use, in particular due to over-
straining of the machine.
 Damage caused personally through incorrect use or failure to observe our operating
instructions,
 negligent or incorrect handling and use of improper operating materials.
 Unauthorized modifications and repairs.
 Insufficient installation and safeguarding of the machine.
 Disregarding the installation requirements and conditions of use.
 Atmospheric discharges, overvoltage and lightning strokes as well as chemical influences.
The following items are also not subject to liability or warranty claims:
 Wearing parts and components which are subject to a standard wear as intended such as
e.g. V-belts, ball bearings, illuminants, filters, sealings, etc.
 Non reproducible software errors
Any services, which OPTIMUM GmbH or one of its agents performs in order to fulfil any addi-
tional warranty are neither an acceptance of the defects nor an acceptance of its obligation to
compensate. These services neither delay nor interrupt the warranty period.
The court of jurisdiction for legal disputes between businessmen is Bamberg.
If any of the aforementioned agreements is totally or partially inoperative and/or invalid, a provi-
sion which nearest approaches the intent of the guarantor and remains within the framework of
the limits of liability and warranty which are specified by this contract is deemed agreed.
MB4_GB_8.fm
EN MB4

8.4 Storage
ATTENTION!
Incorrect and improper storage might result in damage or destruction of electrical and
mechanical machine components.
Store packed and unpacked parts only under the intended environmental conditions.
Follow the instructions and information on the transport box:
 Fragile goods
(Goods require careful handling)
 Protect against moisture and humid environment

 Environmental conditions on page 19
 Prescribed position of the packing case

(Marking the top surface - arrows pointing up)
 Maximum stacking height
Example: not stackable - do not stack a second pack-

ing case on top of the first one.
Consult Optimum Maschinen Germany GmbH if the machine and accessories are stored for
more than three months or are stored under different environmental conditions than those spec-
ified here.  Environmental conditions on page 19
8.5 Advice for disposal / Options of reuse

Please dispose of your equipment in an environmentally friendly manner, by not placing waste
in the environment but in a professional manner.
Please do not simply throw away the packaging and later the disused machine, but dispose of
both in accordance with the guidelines laid down by your city council/local authority or by an
authorised disposal company.
8.5.1 Decommissioning
CAUTION!
Immediately decommission used machines in order to avoid later misuse and
endangering of the environment or of persons.
 Unplug the power cord.
 Cut the connection cable.
 Remove all operating materials from the used device which are harmful to the envi-
ronment.
 If applicable remove batteries and accumulators.
 Disassemble the machine if required into easy-to-handle and reusable assemblies
and component parts.
 Dispose of machine components and operating fluids using the intended disposal
MB4_GB_8.fm
methods.
MB4 EN

8.5.2 Disposal of new device packaging
All used packaging materials and packaging aids from the machine are recyclable and gener-
ally need to be supplied to the material reuse.
The packaging wood can be supplied to the disposal or the reuse.
Any packaging components made of cardboard box can be chopped up and supplied to the
waste paper collection.
The films are made of polyethylene (PE) and the cushion parts are made of polystyrene (PS).
These materials can be reused after reconditioning if they are passed to a collection station or
to the appropriate waste management enterprise.
Only forward the packaging materials correctly sorted to allow direct reuse.
8.5.3 Disposal of the old device
INFORMATION
Please take care in your interest and in the interest of the environment that all component parts
of the machine are only disposed of in the intended and admitted way.
Please note that the electrical devices comprise a variety of reusable materials as well as envi-
ronmentally hazardous components. Please ensure that these components are disposed of
separately and professionally. In case of doubt, please contact your municipal waste manage-
ment. If appropriate, call on the help of a specialist waste disposal company for the treatment of
the material.
8.5.4 Disposal of electrical and electronic components

Please make sure that the electrical components are disposed of professionally and according
to the statutory provisions.
The device is composed of electrical and electronic components and must not be disposed of
as household waste. According to the European Directive regarding electrical and electronic
used devices and the implementation of national legislation, used power tools and electrical
machines need to be collected separately and supplied to an environmentally friendly recycling
centre.
As the machine operator, you should obtain information regarding the authorised collection or
disposal system which applies for your company.
Please make sure that the electrical components are disposed of professionally and according
to the legal regulations. Please only throw depleted batteries in the collection boxes in shops or
at municipal waste management companies.
8.5.5 Disposal of lubricants and coolants
ATTENTION!
Please imperatively make sure to dispose of the used coolant and lubricants in an
environmentally compatible manner. Observe the disposal instructions of your municipal
waste management companies.
INFORMATION
Used coolant emulsions and oils should not be mixed since it is only possible to reuse oils with-
out pre-treatment when they have not been mixed.
The disposal instructions for used lubricants are made available by the manufacturer of the
lubricants. If necessary, request the product-specific data sheets.
MB4_GB_8.fm
EN MB4

8.6 Disposal via municipal collection facilities
Disposal of used electrical and electronic components
(Applicable in the countries of the European Union and other European countries with a sepa-
rate collecting system for those devices).
The sign on the product or on its packing indicates that the product must not be handled as
common household waste, but that is needs to be disposed of at a central collection point for
recycling. Your contribution to the correct disposal of this product will protect the environment
and the public health. Incorrect disposal constitutes a risk to the environment and public health.
Recycling of material will help reduce the consumption of raw materials. For further information
about the recycling of this product, please consult your District Office, municipal waste collec-
tion station or the shop where you have purchased the product.
8.7 Change information operating manual
Chapter Short summary new version number

EC declaration modified standard, DIN EN 12100:2010 1.0.2
Control panel new images 1.0.2
Spare parts Added wiring diagram 1.0.3
4 Description of threading mode 1.0.4
1+2+4 Type plates, variants added 1.0.5
Spare parts Update of spare parts drawing 1.0.6
Spare parts Update of spare parts drawing 1.0.7
Spare parts Update of spare parts drawing, column 1.0.8
2.2 + 2.4 + 4.11 tech. data 1.0.9
Spare parts 8.1.1 Important notes of spare part supply 1.1.0
3 Interdepartmental transport 1.1.1
8.8 Product follow-up

We are required to perform a follow-up service for our products which extends beyond ship-
ment.
We would be grateful if you could send us the following information:
 Modified settings
 Any experiences with the drilling- milling machine which might be important for other users
 Recurring malfunctions
D-96103 Hallstadt
email: info@optimum-maschinen.de
MB4_GB_8.fm
MB4 EN

EC Declaration of Conformity
according to Machinery directive 2006/42/EC, Annex II 1.A
The manufacturer / distributor Optimum Maschinen Germany GmbH
D - 96103 Hallstadt, Germany
hereby declares that the following product
Product designation: Hand-controlled drilling and milling machine
Type designation: MB4
fulfills all the relevant provisions of the directive specified above and the additionally applied directives (in
the following) - including the changes which applied at the time of the declaration.
Description:
Hand-controlled drilling and milling machine
The following additional EU Directives have been applied:
EMC Directive 2014/30/EU ; Restriction of the use of certain hazardous substances in electrical and elec-
tronic equipment 2015/863/EU
The following harmonized standards were applied:
EN 13128:2001+A2:2009/AC:2010 Safety of machine tools - Milling machines (including boring machines)
EN 60204-1:2014 - Safety of machinery - Electrical equipment of machines - Part 1: General requirements
EN 13849-1:2015 - Safety of machinery - Safety related parts of controls - Part 1: General design principles
EN 13849-2:2012 - Safety of machinery - Safety related parts of controls - Part 2: Validation
EN ISO 12100:2013 - Safety of machinery - General principles for design - Risk assessment and risk
reduction
Name and address of the person authorized to compile the technical file:
Kilian Stürmer, phone: +49 (0) 951 96555 - 800
Kilian Stürmer (CEO, General Manager)

Hallstadt, 2019-12-11
MB4_CE_en.fm
EN
Version 1.1.1 - 2021-01-25
oil-compare-list.fm
Viskosität
Schmierstoffe Viskosity Kennzeich-
Lubricant Viscosité ISO VG nung nach
Lubrifiant DIN 51519 mm²/s DIN 51502
(cSt)
Aral Degol BG BP Energol SPARTAN Klüberoil Mobilgear Shell Omala
VG 680 CLP 680 Meropa 680
680 GR-XP 680 EP 680 GEM 1-680 636 680
460 GR-XP 460 EP 460 GEM 1-460 634 460
320 GR-XP 320 EP 320 GEM 1-320 632 320
220 GR-XP 220 EP 220 GEM 1-220 630 220
Getriebeöl

Gear oil VG 150 CLP 150 Meropa 150
150 GR-XP 150 EP 150 GEM 1-150 629 150
Huile de réducteur
100 GR-XP 100 EP 100 GEM 1-100 627 100
68 GR-XP 68 EP 68 GEM 1-68 626 68
Aral Degol BG BP Bartran NUTO H 46 Klüberoil Mobil DTE Shell Tellus Anubia EP
VG 46 CLP 46
46 46 (HLP 46) GEM 1-46 25 S 46 46
Aral Degol BG BP Bartran NUTO H 32 Klübersynth Mobil DTE Shell Tellus Anubia EP
VG 32 CLP 32
32 32 (HLP 32) GEM 4- 32 N 24 S 32 32
Aral Vitam GF BP Energol NUTO H 32 LAMORA Mobil Nuto Shell Tellus Rando HD
Hydrauliköl VG 32 CLP 32
32 HLP HM 32 (HLP 32) HLP 32 HLP 32 S2 M 32 HLP 32
Hydraulic oil
Aral Vitam GF BP Energol NUTO H 46 LAMORA Mobil Nuto Shell Tellus Rando HD
Huile hydraulique VG 46 CLP 46
46 HLP HM 46 (HLP 46) HLP 46 HLP 46 S2 M 46 HLP 46
Getriebefett Aral FDP 00

BP FIBRAX EP Shell Alva-
(Na-ve rseift) MICRO- Mobilux
Gear grease G 00 H-20 Energrease 370 nia GL 00 Marfak 00
Aralub MFL 00 LUBE GB 00 EP 004
Graisse de réducteur PR-EP 00 (Na-verseift) (Li-verseift)
(Li-verseift)
67
68
Spezialfette,
ALTEMP
wasserabweisend Mobilux EP
Q NB 50
Special greases, water resi- Energrease 0
Aral Aralub Klüberpaste
stant PR 9143 Mobil Grea-
ME 31-52
Graisses spéciales, serex 47
déperlant
Wälzlagerfett BP Shell Alva-
K 3 K-20 CENTO- Multifak Pre-
Bearing grease Aralub HL 3 Energrease BEACON 3 Mobilux 3 nia R 3 Alva-
(Li-verseift) PLEX 3 mium 3
Graisse de roulement LS 3 nia G 3
Öle für Gleitbahnen BP

Aral Deganit ESSO Febis LAMORA Mobil Vactra Shell Tonna Way lubri-
Oils for slideways VG 68 CGLP 68 Maccurat
BWX 68 K68 D 68 Oil No.2 S2 M 68 cant X 68
Huiles pour glissières D68
Öle für Hochfrequenzspin-

deln
Emergol Spartan EP Drucköl KLP Shell Omala
Oils for Built-in spindles VG 68 Deol BG 68
HLP-D68 68 68-C 68
Huiles pour broches à
haute vitesse
Fett für Zentralschmierung
(Fließfett)
NLGI Klasse 000 CENTO-
Grease for central lubrica- ARALUB Grease Shell Gadus Mobilux Multifak 264
NLGI class 000 PLEX
tion BAB 000 EP 000 S4 V45AC EP 023 EP 000
GLP 500
Graisse pour lubrification
centrale
Fett für Hochfrequenzspin-
deln METAFLUX-Fett-Paste (Grease paste) Nr. 70-8508
Grease for Built-in spindles METAFLUX-Moly-Spray Nr. 70-82
Graisse pour broches à Techno Service GmbH ; Detmolder Strasse 515 ; D-33605 Bielefeld ; (++49) 0521- 924440 ; www.metaflux-ts.de
haute vitesse
Schneidöl Aquacut C1,
Kühlschmiermittel 10 L Gebinde, Artikel Nr. 3530030

Version 1.1.1 - 2021-01-25
Cooling lubricants EG Sicherheitsdatenblatt Chevron

Aral Emusol BP Sevora Esso Kutwell Mobilcut Shell Adrana
Lubrifiants de refroidisse- http://www.optimum-daten.de/ Soluble Oil B
ment data-sheets/Optimum-Aqua-
cut_C1-EC-datas-
heet_3530030_DE.pdf
oil-compare-list.fm
Index
A S
Assembly ..............................................................23 Safety
C instructions ........................................................ 6
Changing the speed range ....................................28 Scope of delivery .................................................. 22
Clamping the tool ..................................................26 Service Hotline ..................................................... 39
Cleaning and lubrication .......................................24 Spare parts Hotline ............................................... 39
Commissioning .....................................................24 Specialist dealer ................................................... 38
Copyright ...............................................................61 Speed range ......................................................... 28
Customer service ..................................................38 Speeds ................................................................. 19
Customer service technician .................................38 Spindle seat .......................................................... 18
D Storage and packaging ......................................... 22
Dimensions ...........................................................18 Switching on ......................................................... 26
Disposal ................................................................65 Switching on the drilling-milling machine .............. 26
Drill-mill capacity ...................................................18 Swivelling the drill-mill head ................................. 32
E T
EC - declaration of conformity ...............................66 Technical data
Electrical connection .............................................18 Speeds ............................................................ 19
Environmental conditions ......................................19 Technical specification
Dimensions ...................................................... 18
F
Drill-mill capacity .............................................. 18
Fine feed ...............................................................31
Electrical connection ........................................ 18
First commissioning ..............................................24
Emissions ........................................................ 19
G Environmental conditions ................................ 19
Guard ....................................................................14 Spindle seat ..................................................... 18
H Work area ........................................................ 19
Hotline Ersatzteile .................................................39 Thread tapping ..................................................... 33
I Transport .............................................................. 21
Inspection ..............................................................34 W
Intended use ...........................................................8 Work area ............................................................. 19
Interdepartmental transport ...................................21
L
Lifting equipment ...................................................16
Load suspension point ..........................................22
M
Maintenance .........................................................34
Malfunctions ..........................................................60
Master switch ........................................................14
Misuse .....................................................................8
O
Obligations
of the operating company ................................11
User .................................................................12
P
Personal protective equipment .............................21
Personnel qualification
Safety ...............................................................10
Power supply ........................................................24
Q
Quill lever ..............................................................32
R
Repair ...................................................................34
MB4_GBSIX.fm
Requirements
Installation site .................................................22
MB4 EN

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Optimum Fräsmaschinen und CNC Fräsmaschinen:

Optimum MB4 Übersicht
• OPTImill MB4
◦ OPTImill MB4 Ersatzteile
◦ OPTImill MB4 Zubehör
• OPTImill Zubehör
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Operating Manual

Drilling- milling machine

Part no. 3338450

4.5.3 Use of collets ...............................................................................................................................27

2 Translation of original instruction Version 1.1.1 - 2021-1-25

Version 1.1.1 - 2021-1-25 Translation of original instruction 3

4 Translation of original instruction Version 1.1.1 - 2021-1-25

 provides further instructions

 calls on you to act

This part of the operating instructions

1.1 Rating plates

DE Fräsmaschine Optimum Maschinen DE Fräsmaschine Optimum Maschinen

Version 1.1.1 - 2021-1-25 Translation of original instruction 5

DE Fräsmaschine Optimum Maschinen DE Fräsmaschine Optimum Maschinen

DE Fräsmaschine Optimum Maschinen

1.2 Safety instructions (warning notes)

1.2.1 Classification of hazards

Symbol Alarm expression Definition / consequence

WARNING! A danger that can cause serious injury or death.

A danger or unsafe procedure that can cause personal injury or damage

Practical tips and other important or useful information and notes.

6 Translation of original instruction Version 1.1.1 - 2021-1-25

1.2.2 Other pictograms

Version 1.1.1 - 2021-1-25 Translation of original instruction 7

1.4 Reasonably foreseeable misuses

8 Translation of original instruction Version 1.1.1 - 2021-1-25

 for workpieces with high strength values, 10-14 m/min,

Version 1.1.1 - 2021-1-25 Translation of original instruction 9

1.5 Possible dangers caused by the drilling- milling machine

1.6 Personnel qualification

1.6.1 Target group

10 Translation of original instruction Version 1.1.1 - 2021-1-25

With professional training, knowledge and experience as well as knowledge of respective

1.6.2 Authorized persons

1.6.3 Obligations of the operating company

Version 1.1.1 - 2021-1-25 Translation of original instruction 11

1.6.5 Additional requirements regarding qualification

1.7 User positions

Img.1-1: User positions

1.8 Safety measures during operation

12 Translation of original instruction Version 1.1.1 - 2021-1-25

1.9.1 Emergency switching off push button

Img.1-2: Emergency switching off push button

right in order to restart the machine.

Version 1.1.1 - 2021-1-25 Translation of original instruction 13

Img.1-3: Protective cover

1.9.3 Lockable master switch

1.9.4 Separation guard

Img.1-4: Separation guard

1.10 Safety check

 before starting work,

14 Translation of original instruction Version 1.1.1 - 2021-1-25

Signs, Installed and legible

1.11 Personal protective equipment

Wear protective gloves when handling pieces with sharp edges.

1.12 For your own safety during operation

because you are taking medication.

Version 1.1.1 - 2021-1-25 Translation of original instruction 15

1.13 Switching-off and securing the drilling- milling machine

1.14 Using lifting equipment