Honing Machine Type S and S2: Instruction Manual

HONING MACHINE
TYPE S and S2
INSTRUCTION MANUAL
Preface CHRIS-MARINE
Doc. No.: I-110-E

Rev. c
2008-01-03
Preface
The equipment described within this manual is designed and manufactured by

CHRIS-MARINE AB, Malmö, Sweden.
The company’s principal activities are in the development and production of grind-
ing machines and tools for use in maintenance of diesel engines in the marine, off-
shore, power generation and allied industries.
Today’s machines are the product of experience and R&D since 1962. All Chris-
Marine machines have proven performance and are continuously updated to meet
the latest standards and demands of diesel technology.
Chris-Marine reserves the right to make improvements to the equipment and it’s
technical documentation. Drawings and diagrams contained within this manual are
intended for illustrative purposes only and are not to scale.
Chris-Marine's liability for damages will only be considered, and are strictly limited
to use of the equipment and grinding wheels when operated in
accordance and compliance with the appropriate Chris-Marine instruction manual.
This manual contains copyright information of the technical nature which is the sole
property of Chris-Marine. Neither this complete manual, nor any part, or parts, or
sections of the contents, shall be copied, reproduced, scanned or duplicated in any
manner without the written consent of Chris-Marine AB.
Edition 1: August 2002
CHRIS-MARINE Contents
Contents
1. .. GENERAL INFORMATION .................................................................................. 1
1.1. EC Declaration of Conformity ................................................................. 1
1.2. Location of Nameplates ........................................................................... 2
Safety information .............................................................................................. 3
1.2.1. .. Manual topics 3
1.2.2. .. Safety Measures 4
1.2.3. .. Safety Instruction Labels 5
2. .. DESCRIPTION ..................................................................................................... 6
2.1. Application ................................................................................................ 6
2.2. Features .................................................................................................... 6
2.3. Technical Data .......................................................................................... 6
3. .. FUNCTION ........................................................................................................... 7
3.1. Main parts.................................................................................................. 7
3.1.1. .. Honing machine type S and S2 8
3.1.2. .. Workshop Honing Rig (Option) 9
3.2. Function overview .................................................................................. 10
3.2.1. .. In-situ operation 10
3.2.2. .. Workshop rig operation 10
3.2.3. .. Stroke control 10
3.2.4. .. Wear edge milling 10
3.3. Driving Unit ............................................................................................. 11
3.3.1. .. Gear Box 11
3.3.2. .. Oil Mist Lubricator 11
3.3.3. .. Spring Load Tensioner 12
3.3.4. .. Guide Support 12
3.4. Honing Head ........................................................................................... 13
3.4.1. .. Detachable Stone Holders 13
3.4.2. .. Honing Liquid 13
3.5. Air Hoist .................................................................................................. 14
3.6. Emergency stop ..................................................................................... 14
3.7. Automatic Stroke Control Device (Option) ........................................... 15
3.7.1. .. Operating conditions of the ASC 15
4. .. INSTALLATION .................................................................................................. 16
4.1. Delivery ................................................................................................... 16
4.2. In-situ Operation set-up ......................................................................... 16
4.2.1. .. Guiding Tube Holder/Adapters 16
4.2.2. .. Machine set-up 17
4.3. Workshop Honing Rig set-up ................................................................ 20
4.3.1. .. Machine Set-up 20
4.4. Driving Unit ............................................................................................. 21
4.4.1. .. Mounting of Driving unit 21
4.4.2. .. Guide Support 21
4.5. Honing Head ........................................................................................... 22
4.5.1. .. Mounting of Honing Head 22
Address: P.O. Box 9025

S-200 39 Malmo, Sweden
©Copyright Chris-Marine AB Phone: +46-40 671 26 00. Fax: +46-40 671 26 99 - iii -
Contents CHRIS-MARINE
4.5.2. .. Mounting of Stone Holders 22

4.6. Driving Unit Air connection ................................................................... 23
4.7. Automatic Stroke Control Device (Optional) ........................................ 24
4.8. Honing Liquid ......................................................................................... 25
5. .. HONING PROCEDURE...................................................................................... 26
5.1. Evaluation prior to honing ..................................................................... 26
5.1.1. .. Evaluation flowchart 26
5.2. Cylinder Liner Condition ....................................................................... 26
5.2.1. .. Scuffing marks and Glazed Liner Surface 27
5.2.2. .. Ovality or Four-leafed clover worn shape 27
5.2.3. .. Trumpet formed shape 27
5.2.4. .. Cross Angle Pattern 28
5.3. Honing Stones and Methods ................................................................. 29
5.3.1. .. Honing Stones 29
5.3.2. .. Honing methods 29
5.4. Honing Zones ......................................................................................... 30
5.5. Wear Edge Milling .................................................................................. 31
5.5.1. .. Wear Edge at TDC 31
5.5.2. .. Using a Wear Edge Milling Machine (VKS) 31
5.6. Wear Edge Honing ................................................................................. 32
5.7. Coarse (Basic) Honing ........................................................................... 32
5.7.1. .. Honing with Diamond Stones 33
5.7.2. .. Intermediate Coarse Honing 33
5.7.3. .. Honing with Ceramic Stones 33
5.8. Fine (Plateau) Honing ............................................................................ 34
5.9. Cleaning .................................................................................................. 35
5.9.1. .. Cleaning by using Cleaning Brushes (Optional) 35
5.9.2. .. Treatment of cylinder grooves and lubricating bores 35
6. .. APPLIED HONING ............................................................................................. 36
6.1. Preparations prior to Honing ................................................................. 36
6.1.1. .. Checking Cylinder Liner Condition 36
6.1.2. .. Removal of TDC1 Wear Edge 36
6.1.3. .. Selecting Honing Stones 36
6.2. Honing ..................................................................................................... 37
6.2.1. .. Commencing Honing Procedure 37
6.2.2. .. Initial Honing 38
6.2.3. .. Wear Edge Honing 39
6.2.4. .. Coarse (Basic) Honing 40
6.2.5. .. Fine (Plateau) Honing 43
6.3. Cleaning after Honing ............................................................................ 44
6.3.1. .. Using the Cleaning Brush (Option) 44
7. .. MAINTENANCE ................................................................................................. 45
7.1. Care and Lubrication ............................................................................. 45
7.2. General maintenance ............................................................................. 46
7.2.1. .. Inspection 46
7.2.2. .. Spare Parts 46
8. .. TROUBLE SHOOTING ...................................................................................... 47
CHRIS-MARINE Contents
8.1. Fault finding table................................................................................... 47
9. .. SURFACE PARAMETERS ................................................................................. 48
9.1. Determining the Surface Condition ...................................................... 48
9.2. Cylinder Liner Requirements................................................................. 48
9.2.1. .. Introduction 49
9.2.2. .. Roughness Profiles (Rz, Rmax, Ra and Mr/tp) 50
9.2.3. .. Abbott-Firestone Curve (AFC) 53
10. SERVICE AND ASSISTANCE ............................................................................ 54
10.1. Chris-Marine representatives ................................................................ 54

©Copyright Chris-Marine AB Phone: +46-40 671 26 00. Fax: +46-40 671 26 99 -v-
CHRIS-MARINE General information
1. GENERAL INFORMATION
1.1. EC Declaration of Conformity
CHRIS-MARINE AB Dokument/ ID: dc-honpn
Datum/ Date: 941219 Rev: 0
Sida/ Page: 1 av/of: 1
Declaration of Conformity
According to the Machinery Directive 89/392/EEC, Annex II A
The Manufacturer:
Chris-Marine AB Phone: +46 40 671 2600

Box 9025 Fax: +46 40 671 2699
S-200 39 MALMÖ
Sweden
declare that the following machinery:
Deglazing & Honing Machine type HON

Manufacturing No.
air driven, Serial No.14
a/ is manufactured in conformity with the Svenska Arbetarskyddsstyrelsens Författningssamling
AFS1993:10. This law conforms with the COUNCIL DIRECTIVE of 14 June 1989 regarding harmonisation of
member states legislative system concerning machinery (Machinery Directive 89/392/EEC, and amending
Directives 91/368/EEC and 93/44/EEC when applicable), with particular reference to Annex 1 concerning the
essential health and safety requirements relating to the design and construction of the machinery.
b/ is besides the provision under a/ manufactured according to following directives and harmonized stan-
dards:
93/68/EEC
Place: MALMÖ, Sweden

Date:
Signed on behalf of:
CHRIS-MARINE AB
BOX 9025
............................................. S-200 39 MALMÖ
enpowered signature and Name in block letters Sweden
Phone: +46 40 671 2600
Fax: +46 40 671 2699

©Copyright Chris-Marine AB Phone: +46-40 671 26 00. Fax: +46-40 671 26 99 -1-
General information CHRIS-MARINE
1.2. Location of Nameplates

This instruction applies to machinery with details as shown in the nameplates illus-
trated below.
When contacting Chris-Marine AB and their representatives, always state Type and
Serial No. of the machinery.
Location of nameplates for driving unit, honing head and hoist

-2- Phone: +46-40 671 26 00. Fax: +46-40 671 26 99 ©Copyright Chris-Marine AB
Safety information
1.2.1. Manual topics
This manual must be carefully studied before using the equipment. It will
help you to use the equipment to its full capacity and avoid costly mistakes.
All safety instructions must be complied with. Failure to do so may result in
injury to personnel or damage to equipment and the environment.
The Instruction Manual is intended primarily for the operator of the honing machine
and describes it’s use.
The manual is divided into four sections; 1) Introduction with general information
(this section), 2) a descriptive section, 3) an instructive section and 4) list of parts.
 Introduction:
These pages consisting of General Information introduce Chris-Marine the equip-

ment, with its nameplate and safety information. It emphasises precautionary
measures and describes the safe working practices as described in the instructive
section of the manual.
 Descriptive information:
The descriptive information consists of the sections Description and Function, and
the section Surface Parameters. It provides an overall description of the equip-
ment, its technical data and performance, its principal technical functions, as well as
the theoretical information on surface parameters and cylinder liner conditions.
 Instructive information:
The sections Installation, Honing Procedure, Applied Honing and Trouble Shooting
provide instructions and information on handling and use of the equipment. The
section Maintenance provides information on servicing of the equipment ensuring
it’s long life and trouble-free operation.
 List of parts
This section consists of a reference sheet and a list of parts. The reference sheet
includes the serial number of the machine and should always be used when order-
ing parts. Addresses of Chris-Marine representatives can be found at the end of list
of parts.

General information CHRIS-MARINE
1.2.2. Safety Measures

Transportation and Installation
 Ensure that the honing equipment is transported safely. Do not lift above peo-
ple.
 Use undamaged and correctly sized lifting equipment only.
 The honing drive motor is provided with lifting eyes. Do always use one of
these eyes and a hook when the honing equipment is lifted.
 Keep hands and objects away from the honing head when the honing stone
pressure is activated.
 Always connect the emergency stop according to instruction.
Use of the machine

 Keep the emergency stop within reach of the operator during honing.
 Use recommended honing liquid only.
 Keep hands and objects away from the honing head when the honing stone
pressure is activated, also from the honing head, as well as the guide support
whenever the honing head is in motion.
 Always stop the honing head when refilling the honing liquid container or if, for
example, the hose for the honing liquid needs to be adjusted.
 Hearing protection should be used when the machine is in operation.
 Do not wear loose clothing i.e. sleeves, ties etc. or hair styles which may be-
come entangled in rotating parts of the honing equipment.
Other precautions
 Always turn off the air supply when the operation is completed, or if the air
supply is interrupted whilst honing.
 Beware of possible air pressure in a stationary honing machine during mainte-

nance.
 The air pressure must not exceed 9 bar (0.9 MPa/130 psi).
IN CASE OF ANY DOUBT, CONTACT YOUR

CHRIS-MARINE REPRESENTATIVE.

1.2.3. Safety Instruction Labels

The safety instruction labels below contain important information concerning risks
associated with particular aspects on operating the machine. Chris-Marine strongly
recommends the operators to familiarize themselves with the signs.
Three different levels of safety instructions, as shown below, are used in the Chris-
Marine Instruction Manuals:
Danger!
Risk of serious or fatal injury to personnel
Safety instructions in this group indicate when there is a risk of

serious injury or injury that could cause death as a consequence
of misuse.
Warning!
Risk of injury to personnel and/or damage to property
Safety instructions in this group indicate when there is a risk of
injury or damage to property or the environment.
Caution!
Use the equipment correctly
Safety instructions in this group indicate that there is a risk of
injury or damage if instruction is not obeyed.
FAILURE TO OBEY THE SAFETY INSTRUCTIONS OF THIS MANUAL CAN

CAUSE ACCIDENTS, WHICH MAY RESULT IN SEVERE INJURY TO
PERSONNEL OR DAMAGE TO PROPERTY OR TO THE ENVIRONMENT.

Description CHRIS-MARINE
2. DESCRIPTION
2.1. Application
The Chris-Marine S- and S2-type honing machine is
used for honing and deglazing of diesel engine cylin-
der liners, ranging from 150 mm to 1000 mm diame-
ter.
The equipment can be used in marine onboard in-situ

applications, stationary power plants and in work-shops.
It can be operated by engine room crews or workshop
staff having basic engineering skills only.
In workshop applications honing and deglazing is done
in a special rig.
2.2. Features
The honing machine has a sturdy design and is
pneumatically driven. When equipped with a stroke
control device (commonly used in workshops), the
machine can be operated semi-automatically.
Oval, or four-leafed clover wear, as well as trumpet-

shaped, scuffed or glazed surfaces, are normal prob-
lems that will occur in cylinder liners, if honing is not
done often enough. This may result in blow-by and
increased cylinder lube oil consumption, with environ-
mental implications and consequential costs.
The Chris-Marine S-type honing machine features:

 Designed for precision basic (coarse) honing and
plateau (fine) honing at in-situ and workshop ap-
plications.
 4-armed honing heads for normal maintenance and
oval wear, and 8-armed honing heads for severe
wear, four-leaf clover wear and other irregularities.
 Ceramic and diamond honing stones and detach-
able 2- or 3-stone holders for all situations.
 Benefits to extended life time of piston rings and
cylinder liners and reduces cylinder oil lube con-
sumption to normal levels.
 Minimise the risk of scuffing and reduces mainte-
nance costs and overhaul downtimes.
 Simple in use; basic engineering skills required.
 Uses environmental-friendly honing liquid. Chris-Marine Honing Machine type S and S2
The Chris-Marine Wear Edge Milling Machine type VKS, is
a complementary cost effective machine for eliminating the
wear edges in a cylinder liner prior to honing.
Honing head type S19/23-S85/102 and

2.3. Technical Data honing head type S2 32/50-S2 85/102
Honing head type S for oval wear (4-arms) are equipped with detachable holders.
Honing head type S2 for irregular wear (8-arms)
Working Honing Honing

CHRIS-MARINE Description
range head head
mm type S type S2
4-arms 8-arms
150 - 200 S15/20
190 - 230 S19/23
210 - 290 S21/29
280 - 420 S28/42
320 - 500 S32/50 S2 32/50
490 - 670 S49/67 S2 49/67
640 - 840 S64/84 S2 64/84
800 - 950 S80/95 S2 80/95
850 - 1020 S85/102 S2 85/102
Gearbox
Cyl. liner Speed Air consumption l/min
diameter rpm
Honing Air driven
mm
machine hoist
150 - 290 51 1500 500
280 - 380 40 1500 500
350 - 500 34 1500 500
450 - 620 24 1500 500
580 - 750 19 1500 500
700 - 1000 14 1500 500
Range of standard dimensions and weights

H1 H2 H3 W Min honing
mm mm mm machine
weight kgs
704 350, 500, 750 620 Adjustable 65
and multiples
 Air pressure: 0.6–0.9 MPa

(6-9 bar or 85–130 psi)
 Noise level: 84 dB(A)/83 dB(C)
 Air hose connection 16 mm (5/8”)
 Honing stone size: 125 mm x 16 mm x 13 mm
 Honing liquid: Soap water solution alt.
Kerosene, degreaser or
light diesel oil
(See Chapter 3.4.2 and 4.8)
3. FUNCTION 3.1. Main parts

Function CHRIS-MARINE
3.1.1. Honing machine type S and S2

The Honing machine comprises the following parts. A
special reference sheet is issued with each delivery
according to the engine specifications. For details, see
List of Parts.
Driving unit UB (A)
1. Spring load tensioner
2. Oil Mist Lubricator
3. Driving motor valve
4. Stone pressure activator
5. Stone pressure adjuster
6. Gear box
Honing head (B)

7. Stone holder arm
8. Detachable stone holder
9. Arm release clutch
10. Honing stone
Air Driven hoist (C)

11. Control handle
12. Emergency stop
13. Speed adjusters (Up-button & Down-button)
14. Oil mist lubricator
15. Chain box
Emergency stop (D)
Others
16. Driving shaft
17. Universal joint
18. Honing liquid container
19. Guide support
20. Guiding tube, upper
21. Guiding tube, lower
22. Suspension bar
23. Hose holder
24. Diamond honing stone
25. Cleaning brush
Emergency stop
Honing machine type S and S2: Main parts

CHRIS-MARINE Function
3.1.2. Workshop Honing Rig (Option)

The Workshop Honing Rig comprises the following
parts. For details, if applicable, see List of Parts.
30. Guiding tube

31. Suspension bar
32. Trolley
33. Rubber end stop
34. Automatic stroke control device (Optional)
Workshop Honing Rig

3.2. Function overview

3.2.1. In-situ operation
The honing machine is to be fitted on the cylinder liner
stud bolts by means of the guiding tubes (20 and 21)
and the suspension bar (22). The air driven hoist (C)
is to be attached to the suspension bar and the honing
machine hooked to the hoist. The guide support (19)
must be fitted in order to balance the torque from the
torsional movement of the honing head (B).
Honing head (B), honing stones (10) and detachable

stone holders (8) are to be selected according to cyl-
inder size and the type of wear and condition of the
cylinder liner.
The honing machine is hooked to the hoist by means

of the upper suspension eye bolt in the driving unit.
When installing the machine in a V-engine, the hook
on the side of the driving unit can be used to line up
the honing machine to the cylinder liner. Honing machine used with in-situ operation
3.2.2. Workshop rig operation

Whenever honing in a workshop, the rig is already
installed with the honing machine fitted.
After cleaning, the cylinder liner is placed and secured

in the rig. Honing head (B), honing stones (10) and
detachable stone holders (8) are to be selected ac-
cording to the type of wear and condition of the cylin-
der liner.
3.2.3. Stroke control

Honing of a cylinder liner is manually performed by
means of a control handle (11) that is operating the
honing machine reciprocally inside the liner.
When a coarse (basic) honing is to be performed and

the cylinder liner condition is severe, an automatic
stroke control device can be used. With the automatic
stroke control device, the reciprocal honing action is
automatically repeated within a pre-determined section
of the cylinder liner.
3.2.4. Wear edge milling

Honing machine used with in-rig workshop operation
Prior to removing the piston, the wear edge at TDC
(Top Dead Centre) must be removed. This can be
done by using the Chris-Marine Wear Edge Milling
Machine type VKS.
The use of a VKS milling machine is described in its

own Chris-Marine instruction book.
Wear edge milling machine type VKS

- 10 - Phone: +46-40 671 26 00. Fax: +46-40 671 26 99 ©Copyright Chris-Marine AB
3.3. Driving Unit

The driving unit comprises a housing with driving de-
vices, a detachable gear box (6), an oil mist lubricator (2)
and a spring load tensioner (1). Inside the driving unit
housing is a driving motor, an air cylinder for pneumati-
cally activating and deactivating the stone pressure. Two
operating valves with levers are located in the front, with
the following function.
 Lever (3) is used to manually start and stop the
driving motor rotation.
 Lever (4) is used to release the stone pressure in
the honing head.
Two drilled brackets are fitted underneath the housing

of the driving unit for attaching the guide support.
Driving shaft(s) of different length(s) (16) are attached

to the driving unit below the spring load tensioner.
3.3.1. Gear Box

The rotating speed of the honing head is determined
by different detachable gear boxes ranging from 14–
51 rpm. The gear box can easily be changed by loos-
ening four Allen screws.
3.3.2. Oil Mist Lubricator

The driving motor is lubricated by means of the oil
mist lubricator (2), equipped with an adjusting screw
(41) for appropriate oil feed.
 The oil flow should be set to 4–5 drops per minute.
Lubricating oil is stored in an oil reservoir, that can be

unscrewed for replenishing oil.

©Copyright Chris-Marine AB Phone: +46-40 671 26 00. Fax: +46-40 671 26 99 - 11 -
3.3.3. Spring Load Tensioner

The stone pressure on the cylinder walls is deter-
mined by the spring tension in the spring load ten-
sioner (1). The spring tension can be set with the stone
pressure adjuster (5), which is transferred to the honing
head by means of an inner tension bar, via the driving
shaft (16).
 The spring tension can be set on a scale 1–8.
The spring tension to the honing head is activated

(On/Off) by operating the air cylinder inside the driving
unit housing by means of the left side lever.
3.3.4. Guide Support

The guide support (19) is used for counteracting the
torque of the driving unit. Two guides (35) are fitted
through two end plates (36) and drilled brackets un-
derneath the housing of the driving unit. The torque is
balanced by means of two torque rollers (37) running
against the guiding tubes (20/21).

3.4. Honing Head

Honing heads are available in a range of sizes, each
covering a wide range of cylinder diameters.
 4-arm honing head.
 8-arm honing head.
A honing head is connected to the driving shaft assem-

bly via a universal joint (17). The joint is double-acting;
i.e. one external joint for the driving shaft and one inter-
nal joint for the inner tension bar for the stone pressure.
The honing head works according to the rack & pinion

principle i.e. all arms are driven by a rack from a
common pinion and move simultaneously.
The connection between the honing head arms and
spring load tensioner can be disconnected by a clutch
(9), in order to freely adjust the stones to the cylinder
wall. Honing head; type 4-arm
3.4.1. Detachable Stone Holders
Two types of stone holders (2-stone holders and 3-
stone holders) (8) are available, to be used with dif-
ferent types of liners:
A 3-stone holder is commonly used for cylinder liners

with large scavenging air ports, to avoid the stones
from becoming stuck in the ports.
A stone holder is secured to a honing head arm by

two (2 pcs) Allen screws, and is easily detached when
the stones are to be replaced with other types of
stones.
Honing head; type 8-arm
3.4.2. Honing Liquid
A honing liquid container with a flexible hose is at-
tached to the driving shaft. This container is commonly
used for smaller cylinder liners. When honing larger
cylinder liners a spray method is recommended.
 Use an ordinary liquid soap solution disolved in
water as honing liquid (see Chapter 4.8).
 As an alternative Kerosene, degreaser or light
diesel oil can be used.
NOTE: Honing oil must not be used with the risk

that the honing stones will be clogged.

3.5. Air Hoist

The Chris-Marine air driven hoist is a pneumatic chain
type hoist used for reciprocal operation of the honing
equipment. Two (2 each) sizes of the air hoists are
available according the cylinder diameter to be honed:
 Air hoist 125 kg for cylinders < ø600 mm.
 Air hoist 250 kg for cylinders ≥ ø600 mm.
The elevating honing speed can be set on the control

handle by means of two speed controls (adjustable
up/down buttons) that governs the air supply. The
speed controls can be set to an appropriate speed to
achieve a suitable cross angle pattern.
Supply air for the air driven hoist is connected to an oil

mist lubricator, similar to the one used for the driving
unit.
Chris-Marine air driven hoist
For further information refer to the Chris-Marine air
hoist instruction manual.
Caution!
The function of the emergency button on the
control handle is by-passed when the ASC
is in action. The emergency stop button on
the handle is only stopping the air hoist
movement, not the drive unit rotation.
3.6. Emergency stop

When the emergency stop is pressed it will stop all
air supply to both driving unit and air hoist. Keep it
within reach of the operator during honing.
Ensure that the emergency stop is correctly con-

nected, see chapter 4.3.1, 4.4.1 and 4.6.
Emergency stop

3.7. Automatic Stroke Control Device (Option)

A honing machine can be optionally equipped with a
valve assembly for automatic stroke control (ASC). The
ASC device is commonly used on a workshop honing
rig.
The valve assembly is equipped with an elevating shift

rod (pull/push rod, 43) with two pieces (2 pcs) of end
stops, each with a lock grip for the appropriate end
stops, and a consol (44) with two holes to be attached
to the guide support of the honing machine. The rod is
delivered in standard lengths and can be assembled
to an appropriate overall length suitable to certain
cylinder liner sizes.
3.7.1. Operating conditions of the

ASC
Air hoses for the ASC are connected by using quick-
couplings of male/female type that can not be mis-
connected. Furthermore, the ASC can be discon-
nected and the air hoist connected directly to control
handle whenever the ASC is not required.
A shift valve (45) is fitted to the control handle bypass-

Automatic Stroke
ing the speed controls (13) when ASC is used. Thus,
Control Device (ASC)
the honing is performed at full speed of the air hoist,
once the end stops are being set.

Installation CHRIS-MARINE
4. INSTALLATION
4.1. Delivery
The Chris-Marine honing machine can be delivered as
a complete unit in a specially designed storage box
(option), for easy handling and proper storage. The
content of the storage box complies with the Refer-
ence sheet in the List of Parts.
At delivery, the honing machine and its storage box

must be checked for transport damage. Also check
that all parts are included as ordered.
Metal parts are coated to prevent corrosion. Before
use, clean all parts with a suitable solvent or anti-
corrosive oil.
4.2. In-situ Operation set-up

The honing machine can be set up in different ways,
depending on the available headroom or other cir-
cumstances in the engine room:
 Use the overhead engine room crane and assem-
ble the honing machine by the suspension bar
hanging in the hook, or..
 Assemble the honing machine from the cylinder
liner, starting with the lower guiding tubes, or a
guiding tube holder, if applicable (See below).
4.2.1. Guiding Tube Holder/Adapters

Different types of guiding tube holders / adapters can
be supplied:
 Holders for 4-stroke engines of V-type with only
four stud bolts (46). These holders are used to
change the base position of the guiding tube to be
positioned between two stud bolts.
 Holders for 2-stroke engines, where the bolts ei-
ther are too big or the bolt size unknown (47).
 Guiding tube adapter is used to stabilize the guid-
ing tube if the diameter difference between bolt
and tube is too big (48).
Guiding Tube Holder and Guiding Tube Adapters

CHRIS-MARINE Installation
4.2.2. Machine set-up

Suspension Bar
The suspension bar (22) is to be assembled to match
the distance between the stud bolts or the guiding
tube holder.
1)
1. Fit lower guiding tubes (21) opposite each other
2)
on two cylinder liner stud bolts . Make sure that
the guiding tubes stand firm on the engine.
Note 1) Cylinder stud bolts with a diameter much
less than ø54 mm may require guiding tube adapters
for stabilising the lower guiding tubes (see ref. sheet
in the list of parts).
Note 2) V-engines with 4 cylinder bolts only, need
a guiding tube holder to be fitted onto the cylinder
liner stud bolts (see ref. sheet in the list of parts).
Suspension bar with guiding tubes lower
- Make sure that the lower guiding tubes (21)
stand firm on the connection piece of the guid-
ing tube holder.
2. Loosen screws (50) of suspension bar and fit on to
the lower guiding tubes and adjust.
3. Make sure that the eye bolt of the suspension bar is
centered, then secure locking screws (50)
4. Unscrew suspension bar (22) from lower tubes.
5. Fit the upper guiding tubes (20) to the bolts (49) of
the suspension bar (22).
6. Hook suspension bar on the engine room overhead
crane.
7. Attach the hose holder (23) to one of the upper guid-
ing tubes (20).
- Ensure that the hose holder is high enough not to
interfere with the guide support.
Air Hoist/ Oil mist Lubricator
8. Attach air driven hoist to the suspension bar (22).
9. Check the oil level in the oil mist lubricator and if
necessary, unscrew container (51) and fill up with
recommended oil, see Chapter 7.1. Honing Machine; In-situ operation set-up
10. Drain air supply by carefully blowing out some air in

the open and connect the air supply to the air
driven hoist.
11. When starting the air driven hoist check that the oil
flow is set to 4–5 drops per minute. Adjust if neces-
sary.
12. Hoist the engine room overhead crane with the
hooked on suspension bar to a comfortable level

Guiding tubes
13. Fit lowermost upper tubes (20), if applicable, to
the upper tubes.
 If the overhead space in the engine room is lim-

ited, continue the set-up with position 21.
14. Remove the lower guiding tubes from stud bolts

and fit to the lowermost upper tubes or the upper
tubes, whichever applicable.
15. Refit lower guiding tubes (21) with entire assem-

bly diagonally on two cylinder liner stud bolts.
Make sure that the guiding tubes stand firm.
Driving Unit
16. Lower the hook of the air driven hoist and attach it
to the assembled driving unit.
 See Driving Unit Chapter 4.4 for assembling.
Honing Head
17. Assemble and connect the honing head.
 See Honing Head Chapter 4.5 for assembling.
After honing the entire unit can be lifted with crane to
next cylinder.
Moving to the next cylinder

18. Lift up the entire assembly with engine room
crane.
19. Move to the next cylinder liner.
20. Fit the assembly diagonally on next two cylinder

liner stud bolts.
Limited overhead space

Continued from position 13.
21. Lower the assembly with the upper guiding tubes
to the lower guiding tubes standing on the stud
bolts.
22. Fit lower guiding tubes to the upper tubes. The

lower tubes can rotate freely around the stud
bolts.
Driving Unit
23. Lower the hook of the air driven hoist and attach it
to the assembled driving unit.
 See Driving Unit Chapter 4.4 for assembly.
After honing the entire unit can be lifted with crane to
next cylinder.

Honing Head
 See Honing Head Chapter 4.5 for assembly.
Moving to next cylinder

25. Detach unit from lower guiding tubes.
26. Lift up unit with engine room crane and move to

next cylinder liner.
27. Move lower guiding tubes to the next cylinder and

place diagonally on next two cylinder liner stud
bolts.
28. Reconnect with unit by turning lower guiding tubes

only.
Honing Machine; In-situ operation set-up complete

4.3. Workshop Honing Rig set-up

The honing rig is to be set up on a firm foundation and
can, if necessary be secured to the floor with four
bolts.
4.3.1. Machine Set-up

See separate instruction for honing rig.
Air Hoist/Oil mist Lubricator

1. Attach air driven hoist to the eye bolt in the sus-
pension bar (22).

recommended oil, see chapter 8.1.
3. Connect the hose from the air hoist to the emer-

gency stop outlet.
 When starting the air hoist check that the oil flow
is set to 4–5 drops per minute. Adjust if necessary.
Driving Unit
4. Lower the hook of the air hoist and attach it to the
assembled driving unit.
 See Driving unit chapter 4.4 for assembly.
Honing Head
 See Honing head chapter 4.5 for assembly.
Honing Rig set-up

4.4. Driving Unit

The driving unit is delivered partly assembled. in the 3. Equalize distance “a” between driving unit and
following instruction the procedure is described how to guiding tubes and lock with Allen screws (52). Al-
assemble and install the driving unit. low for a clearance “b” of about 5 mm.
4.4.1. Mounting of Driving unit

Caution!
The driving unit is preferably assembled hooked to the
Position of torque rollers!
air hoist at a convenient working position, after the
guiding tubes (20/21) and suspension bar (22), or the Make sure that the torque rollers (51) are
workshop honing rig, has been set up. fitted on the correct side of each guiding
tube, for balancing the torque of the driving
1. Make sure that appropriate gear box (6) is fitted to unit.
the driving unit. Replace the gear box if neces-
sary.
 This applies only if the honing machine is to be
used for other cylinder diameters.
2. Connect driving shaft(s) (16) to spring load ten-
sioner (1).
 The number of driving shafts depend on the cylin-
der liner length.
– See reference sheet in list of parts.
3. Connect universal joint (17) to the lower driving
shaft (16).
4. Connect the air hose from driving unit to the
emergency stop outlet.
5. Fit honing liquid container (18) to the driving shaft.

(can be omitted if other means for applying honing
liquid is used).
 If no driving shaft is used, a special liquid con-
tainer is fitted on the spring load tensioner (1).
4.4.2. Guide Support

Driving Unit and Guide Support Assembly
Two drilled brackets for holding guide support (19) are
located underneath the housing of the driving unit.
1. Fit one of the guide supports through the brackets.
Ensure that the torque roller is positioned as
shown on picture beside.
2. Fit the other guide support with the torque roller on
the opposite side of the guiding tube.
Driving unit top view

4.5. Honing Head

Select the appropriate honing head depending on the
cylinder liner diameter and condition:
 Type S; 4-arm honing head for normal mainte-
nance and oval cylinder wear.
 Type S2; 8-arm honing head for larger cylinder diame-
ters, severe wear irregularities and four-leafed clover
shaped wear in cylinder liners.
4.5.1. Mounting of Honing Head

1. Connect the honing head (b) to the universal joint
(17) of the driving unit.
2. Set the left lever (4) on driving unit in OFF for

deactivating stone pressure.
4.5.2. Mounting of Stone Holders

1. The honing head is supplied with one set of de-
tachable stone holders mounted in the head.
Two types of detachable holders can be used:
 2-stone holders are normally used for honing of
cylinder liners of 4-stroke engines and the major
surface area of large 2-stroke cylinder liners.
– A single stone can be used in a 2-stone holder,

for the honing of wear edge or local wear.
 3-stone holders are commonly used for honing at Honing Head with Detachable Stone Holders
the scavenging air port area of large 2-stroke cyl-
inder liners.
2. Select honing stones (10) according to the cylin-

der liner condition. See chapter 5.
 Diamond stones (optional) should be used for
hardened (glazed), scuffed or badly worn cylinder
liners.
 Ceramic stones (coarse and fine) should be used
for normal cylinder wear.
3. Fit honing stones (10) to the stone holders (8) and

then fit the stone holders with honing stones to the
honing head.
 When using new honing stones make sure that
the chamfering at the honing stone edge is turned
outwards.

4.6. Driving Unit Air connection

When installation of honing machine is completed, the
Oil Mist Lubricator on the Driving Unit should be filled
with recommended oil (Chapter 7.1). Air supply as speci-
fied in Technical Data (Chapter 2.3) should be con-
nected.
 For connecting the air hoist see chapters 4.2.2 or
4.3.1.
 For installation of the automatic stroke control de-
vice, see chapter 4.7.
Oil mist Lubricator of Driving Unit

recommended oil, see chapter 7.1.
 When starting the driving unit check that the oil
flow is set to 4–5 drops per minute. Adjust with
screw (41) if necessary.
Air Supply to Driving Unit

2. Set right lever (3) on driving unit in OFF for man-
ual start.
Warning!
Unexpected start!
Right lever on driving unit for manual
start must be in position OFF in order to
avoid unexpected start when connecting
the air supply.
3. Drain air supply by carefully blow off some air in

the open and connect the air supply to the emer-
gency stop inlet. Connect the hose from the driv-
ing unit to the emergency stop outlet.
4. Test run honing machine by setting the right lever

(3) in ON for manual start.

4.7. Automatic Stroke Control Device (Optional)

The automatic stroke control device is normally used
in combination with Chris-Marine honing rig.
For installation, see separate instruction.
Automatic Stroke Control Device (Optional)

4.8. Honing Liquid

Mix ordinary liquid cleaning soap (about 10%) and
rust preventive oil (3–5%; can be omitted) in fresh-
water and fill the honing liquid container (18).
Caution!
Honing liquid!
Use soap solution, Kerosene, de-
greaser or light diesel oil.
Do not use honing oil as this will

clog the honing stones
As an alternative Kerosene, degreaser or light diesel

oil can be used as honing liquid.
 Fit a collecting tray (39) at the lower part of the
cylinder liner for trunk diesel engines, to collect
the surplus honing liquid.
As an alternative to the liquid container (18), an injec-

tor spray system or a pump system can be supplied
by Chris-Marine.
Container and Collecting tray for Honing Liquid

Honing Procedure CHRIS-MARINE
5. HONING PROCEDURE
5.1. Evaluation prior to honing
To determine if a cylinder liner must be honed or not, an evaluation of the liner can
be performed according to the flowchart below.
5.1.1. Evaluation flowchart
Observation
Piston ring surface
Scuffing? No
Micro Seizure?
No No
W ear edge Hard contact?
Liner oval?
present?
Yes
Yes Yes No
New rings to
Fit the wear edge Liner running surface be fitted?
No
milling machine Scuffing?
Yes
and remove Machining marks
wear edge present?
No
Yes Liner oval?
A proper groove
in the
No Yes "Light Honing" by
wear edge No honing to
area is established Liner oval? means of ceramic
be performed
coarse stones
Yes
Clean the inner liner Use fine stones
surface with a soap "Heavy honing" of for removal of
solution and rags the upper part of liner excessive metal and
running surface by creation of
ceramic coarse plateau surface
stones or diamond
Measure the liner stones
for the cylinder Clean the inner liner
condition report surface with soap
solution and rags
"Heavy honing" of
scuffed areas by
ceramic coarse
stones and diamond Meassure the liner
stones for the cylinder
condition report
Clean all grooves

in the liner with
soap solution
and air pressure
Oil the liner

surface with
cylinder LO
Honing
completed
Flowchart for evaluation of honing demand

5.2. Cylinder Liner Condition
CHRIS-MARINE Honing procedure
5.2.1. Scuffing marks and Glazed Liner Surface

A hard layer is developed in the liner surface when
scuffing occurs between the liner and piston rings.
When replacing piston rings in a scuffed cylinder liner,
honing must be performed.
Scuffing is defined as adhesive wear when for various

reasons the lubrication oil film disappears, and metal-
lic contact is established between the piston rings and
the cylinder liner.
Scuffing in a cylinder surface
5.2.2. Ovality or Four-leafed clover worn shape

Irregularities like ovality or four-leaf clover wear may
appear due to the piston not being geometrically lo-
cated in the cylinder liner, or because of abrasive
wear caused by blow-by, corrosive wear and scuffing.
These problems may also be caused by abrasive
particles brought in to the cylinder liner as impurities in
the fuel, i.e. cat fines, or by sand in the scavenging air,
grinding the cylinder liner and the piston rings.
Abrasive wear is possibly the easiest wear pattern to

identify. It appears as long vertical scratches (fine or
coarse) in the cylinder liner surface.
Ovality or four-leafed clover worn cylinder liner
5.2.3. Trumpet formed shape

When excessive wear appears in the upper part of a
cylinder liner, a trumpet shape sometimes occurs. This
type of irregularity may be caused by corrosive wear or
scuffing. A trumpet shape needs to be removed, leaving
a long transition that reduces the load exerted on both
the piston and the piston rings.
Corrosive wear is caused by the formation of sulphuric

acid on the liner surface when the temperature is be-
low the dew point and the oil film is missing or scarce.
Abrasive wear and corrosive wear appears often si-
multaneously as corroded particles torn off the surface
act abrasively. Trumpet formed cylinder liners

Honing Procedure CHRIS-MARINE
5.2.4. Cross Angle Pattern

To achieve a proper honing, a honing pattern template Template 45°
can be used.
 A transparent template with different cross an-
gles is included in this instruction manual.
Honing pattern
The correct honing pattern is achieved by running
the honing head up and down between the turning
points at a certain speed.
 Run the honing head a couple of strokes and
compare the pattern with the supplied template.
 Adjust the speed of the reciprocal movement of
the honing head by means of the adjustment
buttons on the air hoist, until the honing pattern
matches the required cross angle, and hoisting
and lowering speeds are equal.
Perform the honing procedure as described in

chapter 6.
 If the required cross angle cannot be reached,
a change of drive unit gear might be necessary.
– To increase the cross angle at a certain re- Template 55°

ciprocal speed of the air hoist, reduce the
speed of the driving unit motor.
– To decrease the cross angle at a certain re-

ciprocal speed of the air hoist, increase the
speed of the driving unit motor.
Honing Template for Cross Angle

CHRIS-MARINE Honing procedure
5.3. Honing Stones and Methods

5.3.1. Honing Stones
The difference between ceramic hard and soft honing stones is based on the bond-
ing material of the grains. The grains of “soft” stones will be torn off faster than those
of “hard” stones. Thus, the terminology is not concerned with the hardness of the
grains themselves, but the bonding medium.
 A normal cylinder liner surface can be honed with soft or medium honing
stones.
 A hardened cylinder liner surface requires diamond or soft honing stones.
 Diamond stones (optional) are extremely hard and require less contact pres-
sure than for ceramic stones for the same cutting performance. These stones
are beneficial and time saving in the event of surface irregularities, or hard-
ened liner surfaces.
Chris-Marine original honing stones are available in a variety of types for various
surfaces. For each type of diesel engine Chris-Marine have recommended a set of
honing stones which are specified on a reference sheet in the List of parts of the
appropriate Instruction book.
The list below shows the most commonly used ceramic honing stones.
1) 2)
Stone number Grain size Hardness Honing Method
11373-20-23 36 5 A
11373-20-20 36/46/54 1 B
11373-20-13 36/46/54 2 A, B
11373-20-10 46 2 B
11373-20-04 60 2 B
11373-20-01 80 2 B, C
11373-20-16 100 2 B, C
11373-20-17 220 2 C
11373-20-35 320 2 C
11373-20-36 400 2 C
1)
Degree of hardness: 1-2=Soft, 3=Medium, 4-5=Hard
2)
See below. If special conditions occur, please contact Chris-Marine AB.
5.3.2. Honing methods

A. Removal of wear edge
NB: Whenever required the wear edge can be removed with a Chris-Marine
Wear Edge Milling Machine type VKS, by milling of a groove in wear edge po-
sition. The groove serves to prevent the build-up of a new wear edge.
B. Coarse (basic) honing, using medium or soft honing stones, or diamond

stones.
C. Fine (plateau) honing, using “soft” honing stones.

Honing procedure CHRIS-MARINE
5.4. Honing Zones

For the purpose of defining this job, the cylinder liner
can be divided in five zones, including the TDC and the
overall area.
This information applies to all medium and low speed

Diesel engines, apart from zone 4 (low speed ).
Top Dead Centre (Zone 1)

The TDC is treated separately in order to remove the
wear edge. See Chapter 5.5, 5.6.
Transition area (Zone 2)

The transition zone is usually the most worn part of a
cylinder liner. The wear pattern is often off centre and
oval to some extent, and a wear edge may be present
for more than one of the rings.
 Honing is not recommended in the area above the
grove, if milling of the wear edge has been carried 1. TDC zone
out. 2. Transition zone
Major surface area (Zone 3) 3. Major surface zone
4. Scavenge port zone
This zone is the largest and the most time consuming 5. Overall zone
surface area to hone.
Wear pattern profile divided in zones (areas)
 The reciprocal movement of the honing machine
should cover the entire zone from slightly below the The following table can be used as a guideline for
TDC to just above the scavenging ports at a steady honing cylinder liners of large 2-stroke engines. The
pace.
time consumption is subject to the liner condition, as
Scavenging air port area (Zone 4) well as the method used and the size of the liner.
Honing of this zone is done for larger ports sizes in
two steps: Time consump-
Zone Process
tion
a. From above the scavenging air ports and down
to 1/3 of the stone holder length. Milling or Coarse
1 30 or 60 min.
honing
b. From below the scavenging ports and up to 1/3
of the stone holder length. 2 Coarse honing 1 to 3 hours
3 Coarse honing 2 to 4 hours
 Honing across the ports should be avoided as the
honing head may get caught and damaged. 4 Coarse honing 30 min. to 2 hours
By using stone holders for 3 pcs of honing stones Coarse and/or Fine
5 1) 10 to 30 min.
each, honing across ports can be performed. honing
Make sure that the honing head reaches the bottom of 1)

Coarse honing can be applied in order to reduce the
the cylinder liner. If not, install a sufficient number of surface roughness produced by Diamond Stones, and
driving shafts to the honing machine. simultaneously used for honing the scavenging ports.
Full length treatment of the overall area (Zone
5)
The purpose of a full length plateau honing is to create
a good running surface for the piston ring by using fine
ceramic stones. This final phase can be carried out in a
short time.

Honing Procedure
5.5. Wear Edge Milling

5.5.1. Wear Edge at TDC
The wear edge developes from long time wear or
abnormal wear in the cylinder liner, preventing the
piston being pulled out of the liner by the top piston
ring. Problems can also occur if the top piston ring is
replaced without removal of the wear edge.
The task is to remove the wear edge at the TDC and

to create a grove of a defined dimension.
 Use the Chris-Marine Wear Milling Machine type
VKS to remove the wear edge.
It is strongly recommended not to use a conventional

angle grinder.
If the wear edge is not severe, or if the cylinder design

includes a PC-ring (anti polishing ring), it can be re-
moved by honing using hard ceramic stones or dia-
mond stones.
Piston/Top piston ring in TDC
5.5.2. Using a Wear Edge Milling Machine (VKS)

With a heavily worn cylinder liner it is necessary that
the wear edge is removed prior to pulling out the pis-
ton.
The Chris-Marine Wear Edge Milling Machine (VKS)

offers the best solution without risk of damage to the
running surface of the cylinder liner. This machine is
available in different versions to fit a specific type of
diesel engine. This will ensure that it is always cor-
rectly positioned and the milling process can be finely
controlled at all times.
For the mounting and operation of the VKS Milling

Machine, see Chris-Marine instruction book or CD.
Caution! Chris-Marine Wear Edge Milling Machine VKS
Removal of Wear Edge!

Never use an angle grinder to remove
the wear edge in order not to damage
the cylinder running surface!

Honing Procedure
5.6. Wear Edge Honing

A Wear Edge at the TDC of a cylinder liner can be honed by
using hard ceramic stones.
 If the wear edge area is not too deep it may be re-
moved by honing with half-size ceramic hard
stones.
 A ceramic stone is easily split in two by hand
against a hard edge, e.g. a workbench.
Caution!
Honing machine universal joint!
When using ceramic half-size stones,
remove the universal joint of the honing
machine before honing of wear edge, as
these limited stones offer no guiding to Half-size ceramic stone at the wear edge area
the honing head!
When using a half-size ceramic hard stone make sure

the stone upper edges are in line with each other.
For further information see chapter 6.2.3.
5.7. Coarse (Basic) Honing

The purpose of coarse honing is to remove irregularities
like severe score marks, glazed (polished) surfaces,
scuffing or ovality in the liner.
 Recommended ceramic stone grain size for nor-
mally hard surfaces: 36–60, or diamond stones.
 Recommended grain size for very hard and
glazed (polished) surfaces: 80, or diamond
stones.
Diamond stone at the wear edge area
 Recommended stone pressure: as high as possi-
ble, occasionally 8+on the spring tension scale,
provided vibrations does not occur. Reduce spring
tension gradually until vibration ceases.
Should the wear edge have been removed by the use

of a Wear Edge Milling Machine (VKS), honing should
then be done up to the machined groove. Honing is
not recommended in the area above the groove.
When honing a trumpet formed cylinder liner, where

most of the wear is just below the TDC, concentrate
the honing on the trumpet formed area, with occa-
sional honing of the major surface zone.
 Small local areas may be left without a honing pat-
tern. These areas must be dressed up by hand.
For further information see Chapter 6.2.1 and 6.2.4.

CHRIS-MARINE Honing Procedure
5.7.1. Honing with Diamond Stones

Depending on the condition of the cylinder liner dia-
mond stones may have to be used for the coarse hon-
ing, particularly at the transition zone and at the major
surface zone, in order to cut down honing time.
 Do not mix position of the stones when diamond
stones are being used.
By using detachable stone holders diamond stones

are being kept together in specified positions.
5.7.2. Intermediate Coarse Honing

An intermediate honing is commonly performed after
honing with diamond stones. Then use a medium or
soft stone (e.g. hardness 2–3; grain=80–100) and a
high stone pressure (8+). If vibrations should occur, re-
duce the stone pressure.
5.7.3. Honing with Ceramic Stones

Normally, when performing coarse honing using ce-
ramic stones, two (2 pcs) of honing stones are used in
Honing with diamond stones
each stone holder. Should the wear area be narrow,
only one (1 pcs) of honing stone can be used.
 Rinse the cylinder liner surface often with honing
liquid to achieve the highest efficiency.
Avoid honing at the scavenging ports of a low speed

cross-head engine. If honing is to be performed, detach-
able 3 stone holders should be used for larger cylinder
diameters.
Honing with 1pcs of ceramic honing stones

Honing procedure CHRIS-MARINE
5.8. Fine (Plateau) Honing

The purpose of fine(plateau) honing is to remove sur-
face peaks from the coarse honing by flattening the
tops and re-establish a good surface profile with ade-
quate running surface for the piston rings. Plateau is a
finishing hone of the overall surface in the cylinder liner.
 Recommended grain size: 100–400.
 Recommended stone pressure: 2–3.
Allow for a short honing sequence only, or the cylinder

liner surface may become too smooth and loose its lu-
bricant retension.
If honing is to be performed at the Scavenging Ports of

a low speed cross-head engines, detachable 3-stone
holders should be used for larger cylinder diameters.
For further information see chapter 6.2.1 and 6.2.5.
Honing with 3-stone holder

CHRIS-MARINE Honing Procedure
5.9. Cleaning
Cleaning of the cylinder liner after honing is of utmost
importance, as residues from the honing process are
highly abrasive.
 The cylinder liners must be thoroughly cleaned.
Wiping with a rug is not sufficient.
 In the case of a crosshead engine, carefully clean
the scavenging ports, as they normally are cov-
ered with residues in the lower part.
 Clean out the thick build-up of residues from the
bottom of the scavenging box compartment and
wash out thoroughly.
5.9.1. Cleaning by using Cleaning Brushes (Optional)

Cleaning is most effectively done by means of the
Chris-Marine cleaning brushes.
 Assemble the cleaning brushes in the detachable
stone holders. Run the honing machine over the
full surface of the cylinder liner.
 Rinse the cylinder liner surface using lots of hon-
ing liquid during the cleaning cycle.
 Wipe the cylinder liner surface using a clean soft
cloth and inspect for residues.
For further information see chapter 6.3.
Cleaning brush
5.9.2. Treatment of cylinder grooves and lubricating bores

Any sharp edges around cylinder oil grooves and lu-
bricating bores, as well as at scavenging ports (if ap-
plicable), must be dressed up by hand in order to re-
store the chamfer.
Cylinder oil lubricators must be run to ensure no lubri-

cating bores are being blocked.
 Clean the oil grooves and the cylinder liner sur-
face at the grooves using a clean cloth.

Applied Honing
6. APPLIED HONING
6.1. Preparations prior to Honing
Before honing is commenced the following preparations must be done:
 Checking the liner condition:

– See chapter 5.1.1.
1
 Removal of TDC wear edge (if necessary):
– See chapter 5.5 and 5.6.
 Set-up of honing machine:
a. In-situ operation set-up; chapter 4.2, 4.4, 4.5, 4.6 and 4.7.
b. Workshop honing set-up; Chapter 4.3, 4.4, 4.5, 4.6, 4.7 and 4.8.
6.1.1. Checking Cylinder Liner Condition

 Inspect and measure the cylinder liner after cleaning.
– See engine builder’s instruction for limits.

 Determine the condition of the cylinder liner and the measures to be taken for
conditioning of liner surface, as described in chapter 5:
– Wear edge in cylinder liner top dead centre?

– Normal wear, oval or four-clover shaped cylinder liner?
– Hardened (glazed), scuffed or badly worn cylinder liners?
– Honing at the scavenging ports (2-stroke engines)?
6.1.2. Removal of TDC1 Wear Edge

 If necessary remove the wear edge of the cylinder liner top dead centre.
a. Using VKS; chapter 5.5.1 and 5.5.2.

b. Honing by using hard ceramic stones; chapter 5.6.
– Apply the honing procedure as described in chapter 6.2.1 and 6.2.3.
6.1.3. Selecting Honing Stones

 Select and assemble appropriate honing stones according to chapter 5.3.1, with
respect to the surface rougness required and in accordance with the condition
of the Cylinder Liner, as described in Chapter 5.
NB: For each type of engine a set of coarse and fine honing stones are speci-
fied in the Reference Sheet of the List of Parts. By using these stones and by
applying procedures in accordance with this instruction manual, a correct cyl-
inder liner surface structure will be achieved.
1
TDC = Top Dead Center

CHRIS-MARINE Applied Honing
6.2. Honing
Refer to Honing Procedure in chapter 5 and Prepara-
tion prior to Honing in chapter 6.1 before commencing
honing.
Make sure that the emergency stop is correctly

connected and keep it within reach while honing.
6.2.1. Commencing Honing Proce-

dure
1. Make sure the right lever (3) for manual start and Driving unit with levers for manual start and stone
the left lever (4) for stone pressure are both in pressure in OFF position
position OFF.
 The two levers are pointing in different direc-tions

for one and same mode (on/off).
2. Disengage the spring tension by lifting and turning

clutch (9). Push the stone holders (7) inwards to
their smallest diameter.
3. Lower honing head into the cylinder liner using the

air hoist.
4. Run honing machine to the lower and upper re-

versal points. Mark the turning points on one of
the guiding tubes (20/21) by e.g. A piece of tape
or felt pen (does not apply if honing of wear edge).
5. Pull out the stone holders (7) till the honing stones
rest against the cylinder wall and engage the
spring tension with clutch (9).
 Adjust the stone holders for the clutch to engage

and lock into position. Minor play may occur be-
tween the honing stones and the cylinder wall.
 Eventually, as the honing stones wear down, the
spring tension has to be disengaged again by
clutch (9) to set a new position of the stone hold-
ers.
6. Lower the honing head to a convenient posi-tion

in the cylinder liner to access the red and left lever
on the driving unit. Rotate the honing head and Commencing honing procedure
spring load tensioner (1) around to reach the Spring Tension Adjustment
stone pressure adjuster (5). a. Put set pin in one of the index scale holes.
7. Set the left lever (4) in ON to activate the stone b. Loosen Allen screw(s) (53).
pressure.
c. Adjust stone pressure up or down. (Max pres-
8. Use the set pin from tool set to adjust the spring sure=8
tension on the spring load tensioner (1).
d. Tighten one Allen screw.
– Start with index 3 of the scale.
e. Repeat procedure from “a.” until the correct
 See box next column for adjusting procedure. pressure is set.

Applied Honing CHRIS-MARINE
6.2.2. Initial Honing

Operate the honing machine for a short period and
then examine the result, in order to determine the cyl-
inder condition more accurately, as well as the honing
pattern.
1. Adjust flexible hoses from the honing liquid can

towards the cylinder wall and open the valves, or
apply honing liquid by other means.
2. Engage the stone pressure with the left lever (4)

Operating Levers on Driving Unit
3. Set the right lever (3) in ON to start the driving unit.
 Do not leave the honing head running in one posi-
tion only, unless honing the cylinder wear edge.
Warning!
Honing head above cylinder
Warning! liner!
Keep off the honing head!
Do not run the honing head outside
Make sure that no hands or object are the cylinder liner. Accident risk!
near the honing head when started.
NB: The following does not apply when honing the

cylinder wear edge. Proceed to chapter 6.2.3.
4. Run the honing machine a few reciprocal se-

quences between the turning points.
5. Stop the reciprocal movement and the driving unit.

 If necessary, adjust the operating speed to
achieve the correct cross hatch pattern.
– See Cross Angle Pattern in Chapter 5.2.4.

Shut off the Honing Liquid (if applicable).
6. Release the stone pressure with lever (4).
Caution!
Shifting Honing Head Position
Never hoist or lower the Honing head
inside a cylinder liner with the stone
pressure on and the driving unit off!
7. Hoist the honing head and examine the cylinder

wall to assess the cylinder liner condition and if the
correct honing stones are being used.

6.2.3. Wear Edge Honing

If the following is not applicable, proceed with the next
subheading.
As an alternative to honing, the wear edge can be

removed with a Chris-Marine Wear Edge Milling Ma-
chine type VKS. (see 5.5.2)
When honing, use half-size hard ceramic stones. Re-

fer to chapter 5.6 and the following chapters.
 6.2.1 Commencing honing procedure
 6.2.2 Initial honing, pos. 1 and 2.
The procedure for wear edge honing is basically the

same as for coarse honing (chapter 6.2.4) with the
following exception: Chris-Marine Wear Edge Milling Machine VKS
 The reciprocal movement is short or no vertical

movement at all, which means that honing is con-
centrated in the wear edge area.
If the distance between wear edge and liner top is

long, it is not recommended to remove all the material
from wear edge and above, just around the edge it-
self.
Half-size ceramic stone at the wear edge area
Diamond stone at the wear edge area

6.2.4. Coarse (Basic) Honing

This procedure applies to 4-stroke engines and to 2-
stroke engines, above and below the scavenging ports.
Make sure that appropriate honing stones have been

selected and all items have been carried out as de-
scribed in the following chapters:
 6.2.1 Commencing honing procedure
 6.2.2 Initial honing
1. Lower honing head in to the cylinder liner.
2. Disengage the spring tension by lifting and turn-ing

clutch (9). Pull out the stone holders (7) till the hon-
ing stones rest against the cylinder wall and en-
gage the spring tension by clutch (9).
3. Activate the stone pressure with lever (4).
4. Adjust spring tension by means of the set pin in

one index hole on spring load tensioner (1),
loosen Allen screw(s) (53) and adjust spring tension
index.
Tighten one Allen screw and repeat if necessary.
– Set spring tension index to 4–6.

6. Open honing liquid valve, or apply honing liquid by
other means.
7. Start the driving unit with handle (3) and run the
honing machine.
8. Run the honing machine reciprocally by the con-

trol handle (11) between the reversal points. Coarse (Basic) Honing
 Stop the honing occasionally for inspection and
adjustment of the spring tension.
– Set spring tension index to 7–8.

 Run the honing sequence until the result is satis-
factory.
9. Stop the driving unit with lever (3).
– Shut off the honing liquid, if applicable.

10. Release the stone pressure with lever (4).
11. Hoist the honing head above the cylinder liner for
access to the honing stones, for replacing stones.

Warning!
Keep clear of the Honing Head!
Make sure that no hands or object are
near the honing head when started.
Warning!
Honing head above cylinder
liner!
Do not run the honing head outside
the cylinder liner. Risk for swing!
Caution!
Vibration!
If vibration occurs from the honing
stones the stone pressure may be too
high.
Stop immediately and adjust the spring
tension index to a somewhat lower
index.
NB: Increase the stone pressure or reduce the

play between honing stones and cylinder
wall, if the cylinder liner surface
tends to be “Glazed” due to poor
stone cuts.
- Disengage the spring tension by means of
the stone pressure release clutch (9) and
pull out the stone holders to adjust the play.
- Engage the stone pressure release clutch
(9).

Basic (Coarse) Honing, continued
Honing at Scavenging Ports (2-stroke en-

gines)
Replace stone holders (8) with appropriate holders for
3 pcs. honing stones according to chapter 4.5.2.
 Do not use diamond honing stones!
The procedure for this honing is basically the same as
for coarse honing (chapter 6.2.4) with the following
exception:
 Check cylinder liner diameter in the port area. Due

to small contact areas between piston rings and
liner wall, the wear rate can be higher than in
other parts of the liner, which means that honing
might not be possible. Honing at Scavenging Ports
 Set spring tension index to 2-3, and increase if
necessary.
 For smaller 2-stroke engines, the port height can

allow the use of ordinary holders for 2-stones.

6.2.5. Fine (Plateau) Honing

Select a fine honing stone according to chapter 5.3.1
and 5.8..
Apply lots of honing liquid to rinse the cylinder wall

from coarse honing dust and debris. Alternatively,
clean by using the cleaning brushes (option).(see
chapter 6.3 Cleaning after Honing).
The procedure for fine honing is basically the same as

for coarse honing (chapter 6.2.4) with the following
exceptions:
 Set spring tension index to 2-3
 Run only some 10-20 oscillating honing stokes.
Fine (Plateau) Honing

6.3. Cleaning after Honing

Apply the honing procedure to cleaning of cylinder
liner.
6.3.1. Using the Cleaning Brush (Option)

1. Assemble the detachable stone holders with
cleaning brushes and mount them in the honing
head.
2. Set spring tension index to 1-2.
3. Proceed with a normal honing sequence over the

entire liner length while honing liquid is applied.
Continue until all residues from the surface are
removed.
4. Wipe the cylinder liner surface with a clean soft

cloth, and oil the surface.

CHRIS-MARINE Maintenance
7. MAINTENANCE
7.1. Care and Lubrication
The Chris-Marine honing machine and air hoist are
both robust pieces of equipment and require little main-
tenance.
To ensure that the honing machine continues to pro-

vide safe and reliable operation, the following should
be checked regularly:
 Drain connecting pipes and air hoses of accumu-
lated water before each start.
 Check the oil level in the oil mist lubricator and
replenish the oil reservoir whenever needed.
– Unscrew the container (51) and fill the con-

tainer with oil listed below.
 Shut off air supply when the honing machine is Oil Mist Lubricator
not in use.
 Clean the honing machine after each use. The
honing machine, accessories and honing head for
in-situ operation should be stored in their storing
boxes in a dry place (Storing boxes optional).
RECOMMENDED AIR MOTOR OILS
BP Esso Gulf Q8
Energol RDE 46 Merit 100

Arox EP 46
Energol RDE 100 ALMO 525
OK Shell Texaco
Pneutool oil S Torculla 32 ARIES 32
Mobil Oil Statoil Valvoline
Almo 525 Rockway EP 46 ATO No. 10

Maintenance CHRIS-MARINE
7.2. General maintenance

7.2.1. Inspection
Equipment for in-situ operation should be thoroughly checked once a year and in
the case of workshop operation the inspection should be carried out more often,
depending on how frequent the equipment is used.
This instruction only deals with maintenance concerning the honing machine. Main-
tenance for the air hoist is described in the Chris-Marine Air Hoist Instruction Man-
ual.
MAINTENANCE SCHEDULE
Inspection Procedure Interval Remarks
Visual inspection of gear box and Remove the gear box and check
Every 50 hours or 2 months
gears in the driving unit. the gears internally.
Check for damages, loose fittings,
Inspection of drive unit eye bolt Before every honing operation
loose eye bolt
Inspection of air leakage from Every 50 hours or 2 months

hoses, valves and sealings.
Inspection of honing stone hold- Check for damages, loose fittings,
Every 50 hours or 2 months
ers. loose screws.
7.2.2. Spare Parts

Use only Chris-Marine spare parts if replacement is needed in the course of re-
pairs.
 For details, see List of Parts; chapter 10.

CHRIS-MARINE Surface Parameters
8. TROUBLE SHOOTING
8.1. Fault finding table
Problem Possible reason Remedy
Driving motor does not start Air pressure too low or air supply Check air pressure and ensure that
valves closed. air supply valves are open.
Emergency stop activated. Release stop button and press start

button.
Rotor vanes swelled owing to water Remove driving unit and check driv-
in the air supply. ing motor by slightly loosening the six
screws holding air motor end cover
and start motor.
If motor runs retighten the screws. If
motor stops running contact C-M or a
representative.
Driving motor starts, but honing Parts in gear box are broken. Remove detachable gear box and
head does not rotate check gearwheels and keys in the
gear box.
No or poor stone pressure Spring tensioner not working prop- Spring stretched, adjust to higher
erly. index accordingly or
Spring tension starts on 3 instead of contact C-M or a representative for
1. replacement of spring.
Vibrations Too high stone pressure. Lower the stone pressure and in-
crease again gradually.
Too high operating speed on the Change gear box to lower speed.
driving motor.
Poor honing effect Too hard honing stones. Exchange to softer stones or mix
hard and soft stones.
Stone pressure too low. Increase stone pressure.
Clogged ceramic stones. Roughen ceramic honing stones.
General. Use diamond stones (optional)
Decrease the number of stones.
Increase the supply of honing liquid.
Too rough cylinder liner surface Honing stones too rough. Use honing stones with finer grain
after plateau honing size.
Stone pressure too high. Apply lower stone pressure.
General. Apply intermediate honing using
coarse honing stones after honing
with diamond stones.
Apply plateau honing for a longer
period of time than normal.
Too fine cylinder liner surface after Too fine honing stones used. Use honing stones with rougher grain
plateau honing size when coarse honing and apply
higher stone pressure.
Plateau honing time too long. Reduce the period of time at plateau
honing.

Surface Parameters CHRIS-MARINE
9. SURFACE PARAMETERS
9.1. Determining the Surface Condition
Diesel engine designers often specify their require-
ments in terms of Ra, Rz, Rmax and Mr as well as in
cross-angle pattern for cylinder liner surface finish. The
following sections will define these parameters.
Chris-Marine regularly test-hone cylinder liners from

various diesel engine manufacturers and have accu-
mulated considerable knowledge on this subject.
By using Chris-Marine honing equipment and mainte-

nance methods, a diesel engine benefits not only from
an extended working life for cylinder liners and piston
rings but also consequential cost reduction from e.g.
reduced lube oil consumption owing to surface irregu-
larities.
Surface condition
The diagram shows schematically three profile sec-
tions of a cylinder liner wall.
Fig.1: Prior to honing the diagram shows an almost

completely glazed surface.
Fig.2: After coarse (basic) honing the diagram shows a

rough surface with deep groves and high peaks. Work
has been done to remove ovality and scuffing.
Fig. 3: After fine (plateau) honing the high peaks have

been honed down providing a smooth running surface Surface condition before and after honing
for the piston rings.
Recording from a Surface Roughness Instrument

Following readings have been recorded by a surface
roughness instrument after a fine (plateau) honing.
Recording of surface roughness after fine (plateau) honing (example)
9.2. Cylinder Liner Requirements

9.2.1. Introduction
Any deviation from a geometrically ideal surface
has an influence on the functional behaviour of a
machine part. The ever increasing technical de-
mands on machines and machine parts makes, it
clear that it is ever more important, not only to meet Deviations of form (Form error)
size tolerances, but also to consider surface tex-
ture.
Surface irregularities
In a cylinder liner, besides deviations of size, the Waviness
following surface irregularities may occur:
 Deviations of form (Form errors), i.e. deviations
of a bore outline from the ideal circle.
– The cylinder bore might be oval or lobed
(e.g. four-clover wear).
 Waviness, i.e. wave-form irregularities of a
bore outline (W-profile). Roughness
 Roughness, i.e. irregularities in form of groves,
score marks, flakes or protuberances (R-profile).
These surface irregularities may be found in a

combined form described as Superimposed Sur-
face Irregularities (P-profile). Superimposed irregularities
Differences between Surface Irregularities Surface irregularities

The main distinctive feature of superimposed sur-
face irregularities (form, waviness and roughness)
is their horizontal pattern.
The form error (Fa) is the long-wave surface texture

with only a few undulations (Large-scale irregulari-
ties). An ideal cylinder liner, for example, is constitu-
ent with only one undulation (cylinder).
Oval Lobed Wavy
The waviness (Wt) texture and the roughness (Rz)
texture differ in spacing (Small-scale irregularities). Large-scale irregularities (example of Form errors)
Superimposed Surface Irregularities (Unfiltered P-profile)

Evaluation (measuring) length and Reference line

Assessment of surface parameters is only possible within defined evaluation limits
(Evaluation length and Reference line).
The horizontal limitation for the assessment of surface parameters is the evalua-
tion or measuring length, defined to a value between 0.4 and 40 mm depending
on the roughness (groove) spacing, or the average value of several sampling
lengths. The evaluation length determines the portion of the long-wave surface
components (waviness and form error) that will be included in the measurement
result, i.e. the longer the measuring length the higher the assessed profile height
(Pt).
Effect on evaluation length (lm) on profile height (Pt)
The reference line is a mathematically calculated mean line which is fitted into the
profile where the sum of areas enclosed by the profile above the line equals the
sum of those below.
Parameters to be assessed from a roughness profile (R-profile), e.g. Rz, Rmax, Ra

and Mr (Tp), must not be affected from waviness or form components. These com-
ponents require a clear separation, that can only be done by means of electrical
filters in a laboratory.
 A mean line representing the waviness is fitted into the unfiltered profile (P-
profile). The deviation from the mean line is the roughness.
Unfiltered profile (P-profile) separating Waviness (W-profile) and Roughness (R-profile)
For assessing the R-profile the waviness components must be eliminated by sub-
tracting the mean line from the actual profile.
 The reference line of the filtered roughness profile is a straight mean line.
Filtered profile (R-profile) for assessment of roughness

9.2.2. Roughness Profiles (Rz, Rmax, Ra and Mr/tp)
Rz (Mean Peak-to-Valley Height)
Rz is a measure of the average ruggedness of a surface.
Rz can be described as the average of the single peak-to-valley heights of five (5)
adjoining evaluation (sampling) lengths (le). Exceptional profile peaks are only
partly considered, i.e. a single extreme profile peak within the evaluation length
enters in the computation of Rz at 20% only. Rt is the maximum value.
Assessment of Rz
Rmax (Maximum Roughness Depth)

Rmax is a measure of the largest ruggedness of a surface (See Rz above).
Rmax can be described as the largest single peak-to-valley heights of five (5) ad-
joining evaluation (sampling) lengths (le).
Rmax must not be confused with Rt (Maximum Roughness Depth), that is the dis-
tance of the highest and the lowest points of a profile within the evaluation length
(lm). No standardized measurement conditions exist for this parameter.
Assessment of Rmax (see Rz) and Differences between Rmax and Rt

Ra (Arithmetical Mean Roughness)

Ra is the arithmetical average deviation from the mean line throughout the evalua-
tion (sampling) length (lm).
Theoretically, Ra is the distance between two imaginary lines above and below the
mean line, resulting from the conversion in equal squares of the filled profile areas
in the illustration below.
Assessment of Ra
Mr or tp (Material Ratio or Bearing Ratio)

Mr or (tp) is the ratio in % of the profile bearing L1 to L5 at the specified depth c of
the profile to the evaluation length (lm)
The surface parameter Mr (or tp) gives information on the profile shape and thus
on the probable run-in behaviour and wear resistance of surfaces as sliding and
rolling faces of e.g. cylinder liners.
Assessment of material ratio Mr (also called Bearing ratio tp)

9.2.3. Abbott-Firestone Curve (AFC)

The Abbott Curve (AFC) is a graphical representation of the Material Ratio Mr (also
called Bearing Ratio Curve), calculated from multiple horizontal profile section
taken at different heights over the entire profile.
Assessment of Abbott-Firestone Curve (AFC)
AFC gives meaningful information on the profile shape. The slope of the AFC al-
lows to draw information as to the performance of the part under test, e.g. wear
resistance of a bearing face, the run-in behaviour of an engine piston ring, etc.
 If the AFC is slightly sloping, the surface has its peak removed and thus fea-
tures a good wear resistance (see Bumpy profile below).
 A steep AFC curve represents a spiky surface suggesting the profile has a
poor wear resistance (see Spiky profile below).
Bumpy profile Spiky profile

Information deduced from the AFC (bearing ratio curve)
Several surface parameters allowing a description of the functional behaviour of

highly stressed surfaces can be derived from the Abbott Curve and are preferable in
that they characterize not only the roughness, but also the profile shape.
Parameters derived from the Abbott-Firestone curve

Service and Assistance CHRIS-MARINE
10. SERVICE AND ASSISTANCE

10.1. Chris-Marine representatives
In choosing Chris-Marine equipment you have made an investment in quality and accuracy. It is therefore im-
portant that you also use genuine Chris-Marine spare parts and grinding wheels.
Chris-Marine grinding wheels have been especially developed, tested and proven over many years of experi-
ence producing the very highest grinding quality for the benefit of your engines.
Therefore always make sure that the grinding wheels used are of original Chris-Marine make.
For supply of Chris-Marine grinding equipment, and for any assistance, please contact our head office or Chris-
Marine service workshops and agents.


Honing Machine Type S and S2: Instruction Manual

Uploaded by

Copyright:

Available Formats

Honing Machine Type S and S2: Instruction Manual

Uploaded by

Document Information

Original Title

Copyright

Available Formats

Share this document

Share or Embed Document

Sharing Options

Did you find this document useful?

Is this content inappropriate?

Copyright:

Available Formats

Honing Machine Type S and S2: Instruction Manual

Uploaded by

Copyright:

Available Formats

HONING MACHINE

Doc. No.: I-110-E

The equipment described within this manual is designed and manufactured by

Address: P.O. Box 9025

4.5.2. .. Mounting of Stone Holders 22

Address: P.O. Box 9025

CHRIS-MARINE AB Dokument/ ID: dc-honpn

Datum/ Date: 941219 Rev: 0

Sida/ Page: 1 av/of: 1

Chris-Marine AB Phone: +46 40 671 2600

Deglazing & Honing Machine type HON

Place: MALMÖ, Sweden

Address: P.O. Box 9025

1.2. Location of Nameplates

Location of nameplates for driving unit, honing head and hoist

Address: P.O. Box 9025

These pages consisting of General Information introduce Chris-Marine the equip-

Address: P.O. Box 9025

1.2.2. Safety Measures

 Use undamaged and correctly sized lifting equipment only.

 Always connect the emergency stop according to instruction.

Use of the machine

 Use recommended honing liquid only.

 Hearing protection should be used when the machine is in operation.

 Beware of possible air pressure in a stationary honing machine during mainte-

IN CASE OF ANY DOUBT, CONTACT YOUR

Address: P.O. Box 9025

1.2.3. Safety Instruction Labels

Safety instructions in this group indicate when there is a risk of

FAILURE TO OBEY THE SAFETY INSTRUCTIONS OF THIS MANUAL CAN

Address: P.O. Box 9025

The equipment can be used in marine onboard in-situ

Oval, or four-leafed clover wear, as well as trumpet-

The Chris-Marine S-type honing machine features:

Honing head type S19/23-S85/102 and

Address: P.O. Box 9025

Range of standard dimensions and weights

 Air pressure: 0.6–0.9 MPa

3. FUNCTION 3.1. Main parts

3.1.1. Honing machine type S and S2

Honing head (B)

Air Driven hoist (C)

Emergency stop (D)

Honing machine type S and S2: Main parts

Address: P.O. Box 9025

3.1.2. Workshop Honing Rig (Option)

30. Guiding tube

Workshop Honing Rig

Address: P.O. Box 9025

3.2. Function overview

Honing head (B), honing stones (10) and detachable

The honing machine is hooked to the hoist by means

3.2.2. Workshop rig operation

After cleaning, the cylinder liner is placed and secured

3.2.3. Stroke control

When a coarse (basic) honing is to be performed and

3.2.4. Wear edge milling

The use of a VKS milling machine is described in its

Wear edge milling machine type VKS