Raise Boring Heads

User Manual
Contents

Different raise boring methods .............................................................................................. 4

General recommended reaming parameters ................................................................ 5

General recommended drilling parameters .................................................................... 6

General Safety Instructions........................................................................................................ 8

Mounting of saddles ..................................................................................................................... 10

Saddle positioning........................................................................................................................... 12

Mounting of stem ........................................................................................................................... 15

Mounting of cutters ...................................................................................................................... 17

Cutter positioning .......................................................................................................................... 18

Mounting of segments ................................................................................................................. 24

Segment positioning ..................................................................................................................... 25

Inspection ........................................................................................................................................... 32

Dismounting of stem ................................................................................................................... 33

Wear pad replacement .............................................................................................................. 34

Re-greasing of cutters .................................................................................................................. 35

Re-greasing option.......................................................................................................................... 36

Seal replacement ............................................................................................................................ 37

Transport dimensions and weights ...................................................................................... 38

Spare part list .................................................................................................................................... 42

Reports ................................................................................................................................................ 47

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Different raise boring methods

Raise boring
• Access on two rock faces.
• Ø 0.6 – 6 m range.
• Used for ore passes, ventilation raises, penstocks etc.
• Drill pipes under tension.

Horisontal boring
• Access on two rock faces.
• Ø 0.6 – 4.5 m range.
• Used in civil construction in urban areas ex. cable tunnel,
escape tunnels, sewage tunnels etc.
• Rock stability important.
• Drill pipes under tension.

Blind boring
• Access on one rock face.
• Ø 0.6 – 1.8 m range.
• Used for slot raises, ore passes, manways.
• Drill pipes under compression.
• Needs drill pipe stabilisation.

Down boring with pre-drilled pilot

hole
• Access on one rock face and an opening below.
• Ø 0.6 – 1.8 m range.
• Used for drilling large fill holes.
• Drill pipes under compression.
• Needs drill pipe stabilisation.

4 • r aise boring he ads – user man ual

General recommended reaming parameters
Max recommended operating cutter load......27 tonnes (60 000 Lbs)
Max recommended reaming head speed........see graph below

The net operating cutter load is chosen depending on ma-

chine/ drill pipe capacity and rock characteristics.
Increase the cutter load ≤ max cutter load and/or the
machine/ drill pipe capacity limit as long as increased load
results in increased rate of penetration.
The reaming head speed (RPM) is chosen depending on
reaming head diameter and rock characteristics.
Utilise the optimum (fastest) RPM the rock formation
allows ≤ max recommended reaming head speed together
with optimum net cutter load.
Reduce the RPM before reducing the cutter load.

Cutter maintenance
The raise boring cutter bearings are operating under ex-
treme conditions, exposed to constant high operating loads,
varying degree of uncontrolled shock loads in combination
with high temperatures.
It is of vital importance to use the recommended type of
lubricant suitable for these conditions and to relubricate the
cutters on a regular basis in order to obtain an optimum
cutter service life.
The interval between re-greasing needs to be more frequent
with increased temperature as the lubricant properties are
affected by increased operating temperatures.
See page 33 for the re-greasing instruction.

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General recommended pilot drilling parameters

Max recommended operating bit load...........3 tonnes (6 600 Lbs) x bit diameter in inches
Max recommended speed..............................60 RPM

The net bit load and drilling speed (RPM) is chosen de-
pending on rock characteristics ≤ max recommended bit
load and RPM.
Utilise the highest RPM the rock formation and the ma-
chine allows ≤ max recommended bit RPM together with
the correct bit load for optimum rate of penetration and bit
service life.
Reduce the RPM before reducing the bit load.
For optimum performance use sufficient flushing to clean
the hole and avoid regrinding of cuttings. Use min 800
litres/min of water for efficient flushing.

General information for Sandvik pilot bits

Part no Bit type Diameter Weight Pin connection Max. rec. bit load Rec. drilling speed
mm inch Kg Lbs API reg Kg Lbs RPM
7006-7229-25XXX SCMH 229 9 45 100 Ø 4 1/2" 27 000 59 470 30–60
7006-7251-25XXX SCMH 251 9 7/8 62 137 Ø 6 5/8" 29 600 65 200 30–60
7006-7279-25XXX SCMH 279 11 75 165 Ø 6 5/8" 33 000 72 690 30–60
7006-7311-25XXX SCMH 311 12 1/4 100 220 Ø 6 5/8" 36 750 80 950 30–60
7006-7349-25XXX SCMH 349 13 3/4 120 164 Ø 6 5/8" 41 250 90 860 30–60
7006-7381-25XXX SCMH 381 15 160 353 Ø 7 5/8" 45 000 99 120 30–60

Note. Bit type SCMH is a selected bit for all rock formation. Approx. IADC code is 725.

6 • r aise boring he ads – user man ual

Sandvik reaming heads
The Sandvik reaming heads are available in different Integral head
types: CRH10D
Integral heads ex. CRH10D
Segmented heads ex. CRH10SD
Extendable heads ex. CRH10E
The figure in the name represents the reaming head
diameter in feet (CRH10D=Ø 10”). Designs for other
applications are available ex. blind boring up or down
and for horizontal boring.
Segmented heads are used when reduced transport
dimension and weight is required. Extendable heads are
used for increased flexibility to drill different diameters
using the same base head. All Sandvik reaming heads
have bolted components for improved flexibility and
ease of service and assembly. Segmented head
The reaming heads are designed with different size of CRH10SD
centre hole in order to fit stems for different pilot hole
sizes. Part- and serial numbers are welded on the side
of the reamer as a reamer ID.

Extendable head
CRH10E

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General Safety Instructions
Safety Outfit

Safety Hazards

8 • r aise boring he ads – user man ual

General Safety Instructions
Mounting/Dismounting of saddles
• Make sure the saddle is handled with proper lifting equipment when lifted
• Make sure the saddle is properly secured and that lifting gear rated for the saddle weight is used
• Make sure the fitter is educated and trained to use any lifting gear or tools required to handle the saddle safely
• Make sure the proper tools are used to handle the saddle safely and correctly
• Use proper safety outfit for the activity

Mounting/Dismounting of cutters
• Make sure the cutter is handled with proper lifting equipment when lifted
• Make sure the cutter is properly secured and that lifting gear rated for the cutter weight is used
• Make sure the fitter is educated and trained to use any lifting gear or tools required to handle the cutter safely
• Make sure the proper tools are used to handle the cutter safely and correctly
• Use proper safety outfit for the activity

Mounting/Dismounting of stem
• Make sure the reaming head is supported and secured safely before the stem is mounted/dismounted
• Make sure the stem is properly secured and that proper lifting equipment rated for the stem weight is used
• Make sure the fitter is educated and trained to use any lifting gear or tools required to handle the stem safely
• Do not work within the area of danger around the reaming head before it is properly secured
• Make sure the proper tools are used to handle the stem safely and correctly
• Use proper safety outfit for the activity

Mounting/Dismounting of segment
• Make sure the reaming head is supported and secured safely before the segment is mounted/dismounted
• Make sure the segment is properly secured and that proper lifting equipment rated for the segment weight is used
• Make sure the fitter is educated and trained to use any lifting gear or tools required to handle the segment safely
• Do not work within the area of danger around the reaming head before it is properly secured
• Make sure the proper tools are used to handle the segment safely and correctly
• Use proper safety outfit for the activity

Wear pad replacement

• Make sure the stem is properly secured and that proper lifting equipment rated for the stem weight is used
• Make sure the fitter is educated and trained to use any lifting equipment or tools required to handle the stem safely
• Make sure the proper tools are used to handle the stem safely and correctly
• Do not work within the area of danger around the stem before it is properly secured
• Use proper safety outfit for the activity

Re-greasing of cutters & Seal replacement

• Make sure the cutter is properly secured and that proper lifting equipment rated for the cutter weight is used
• Make sure the fitter is educated and trained to use any lifting equipment or tools required to handle the cutter safely
• Make sure the proper tools are used to handle the cutter safely and correctly
• Do not work within the area of danger around the cutter before it is properly secured
• Use proper safety outfit for the activity

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Mounting of saddles
For Safety Instructions, see page 8-9.

1. The positions are marked on the side of the head

frame. If there are two position marks, the upper
one refers to the position nearest the head centre.
Dowel pins locate the saddles in the correct position.

Note. Do not attach the saddles for position 1

and 2 before the stem is mounted. All bolts,
nuts and contact surfaces must be flat,
cleaned and oiled before mounting.

2. Tighten the bolts crosswise to 2/3 of full torque

(≈800 Nm).
Finish by tighten to full strength 1200 Nm.
Always use new bolts and nuts, even when re-
assembling.
The Nord-lock washers are reusable.

Bolt 7008-9134-01

Lock washer
7008-9135-01

Nut 7008-9135

Example of tool combination

10 • r aise boring he ads – user man ual

Mounting of saddles
Different saddle types are used depending on positioning A special inner saddle, 7008-2013, is used to move cutter in
and the reaming head type. The most frequent dressings position 1 closer to the pilot hole when required and is used
as per the illustration below. The part numbers are 7008- to keep a maximum spacing to obtain efficient spalling into
2XXX (some additional saddles modified for small diam- the pilot hole. (See illustration below).
eters reaming heads are not shown below). The number of Saddle 7008-2013 is required in position 1 when :
the different types varies with the reaming head diameter - Ø 9 / 9 7/8” stem is used in reaming heads with 340 mm
and type. stem fit,
A new and improved gauge saddle system is implemented - Ø 12 1/4” stem is used in reaming heads with Ø 360 mm
on all “D” type reaming heads to make it possible to reduce stem fit (exception CRH10SE),
the reamer diameter by changing the gauge saddles only. - Ø 13 3/4” stem is used in reaming heads with Ø 390 mm
See page 10 for more detailed information. stem fit (exception CRH12E).

Integral & segmented heads

-2007 -2005 -2006

“D” type heads -2024 -2008 -2005 -2006

CRH 12E/12EL
-2030 -2008 -2005 -2006

-2006

Use saddle 7008-2013

to move cutter in pos.1
closer to the pilot hole

-2013

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Saddle positioning
Reaming Head Inner saddle Inner saddle Inner saddle Inner saddle Gauge saddle
head type dia. 7008-2015 7008-2004 7008-2006 7008-2006-05 7008-2003
mm pos. pos. pos. pos. pos.
CRH 2 660 1, 2
CRH 3 950 1, 2 3, 4
CRH 3 1060 1, 2 3, 4
CRH 3 1084 1, 2 3, 4

Reaming Head Inner saddle Middle saddle Semi gauge saddle Gauge saddle Gauge saddle
head type dia. 7008-2006 7008-2005 7008-2008 7008-2007 7008-2024
mm pos. pos. pos. pos. pos.
CRH 4 1420 1,2 3, 4, 5,6
CRH 5 1524 1,2 3, 4 5,6,7,8
CRH 6 / 6S 1829 1,2 3, 4, 5, 6 7, 8, 9, 10
CRH 7 / 7S 2134 1,2 3, 4, 5, 6, 7, 8 9, 10, 11, 12
CRH 8 / 8S / 8L 2440 1,2 3, 4, 5, 6, 7, 8, 9, 10 11, 12, 13, 14
CRH 8D 2447 1,2 3, 4, 5, 6, 7, 8 9, 10 11, 12, 13, 14
CRH 9L 2743 1,2 3, 4, 5, 6, 7, 8, 9, 10 11, 12, 13, 14
CRH 10D / 10SD 3094 1,2 3, 4, 5, 6, 7, 8, 9, 10 11, 12 13, 14, 15, 16

Reaming Head Inner saddle Middle saddle Semi gauge saddle Gauge saddle Gauge saddle
head type dia. 7008-2006 7008-2005 7008-2008 7008-2007 7008-2024
mm pos. pos. pos. pos. pos.
CRH 6E 1829 1,2 3, 4, 5, 6 7, 8, 9, 10
CRH 6E 2236 1,2 3, 4, 5, 6, 9, 10 11, 12, 13, 14
CRH 6E 2429 1,2 3, 4, 5, 6 7, 8, 9, 10, 11,
12, 13, 14
CRH 8E 2441 1,2 3, 4, 5, 6, 7, 8 9, 10, 11, 12
CRH 8E 2765 1,2 3, 4, 5, 6, 7, 8 9, 11, 13, 14,
15, 16
CRH 8E 3154 1,2 3, 4, 5, 6, 7, 8, 13, 15, 16 17, 18, 19, 20
14
CRH 8E 3510 1,2 3, 4, 5, 6, 7, 8, 13, 17, 18 19, 20, 21, 22
14, 15, 16
CRH 10SE 3047 1,2 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, 16
10, 11, 12
CRH 10SE 3372 1,2 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, 16,
10, 11, 12 17, 18
CRH 10SE 3696 1,2 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, 16,
10, 11, 12 17,
18, 19, 20
CRH 10E 3131 1,2 3, 4, 5, 6, 7, 8, 9, 13, 14, 15, 16
10, 11, 12

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Saddle positioning
Reaming Head Inner saddle Middle saddle Semi gauge saddle Gauge saddle Gauge saddle
head type dia. 7008-2006 7008-2005 7008-2008 7008-2007 7008-2024
mm pos. pos. pos. pos. pos.
CRH 10E 3500 1,2 3, 4, 5, 6, 7, 8, 9, 14, 16, 17, 18,
10, 11, 12 19, 20
CRH 10E 3824 1,2 3, 4, 5, 6, 7, 8, 9, 14, 16, 17, 18,
19,
10, 11, 12
20, 21, 22
CRH 10ED 3500 1,2 3, 4, 5, 6, 7, 8, 9, 13B, 14B, 15, 16,
10, 11, 12 17, 18
CRH 10ED 3687 1,2 3, 4, 5, 6, 7, 8, 9, 15, 16 17, 18, 19, 20
10, 11, 12, 13, 14
CRH 10ED 3824 1,2 3, 4, 5, 6, 7, 8, 9, 13B, 14B, 15, 16,
10, 11, 12 17, 18, 19, 20
CRH 10ED 4042 1,2 3, 4, 5, 6, 7, 8, 9, 10, 17, 18 19, 20, 21, 22
11, 12, 13, 14, 15, 16

Reaming Head Inner saddle Middle saddle Middle saddle Semi gauge Semi gauge Gauge saddle
head type dia. 7008-2006 7008-2005 7008-2035 saddle saddle 7008-2030
mm pos. pos. pos. 7008-2008 7008-2038 pos.
pos. pos.
CRH 12E/12EL 3534 1,2 3, 4, 5, 6, 7, 8, 9, 13, 14 15, 16, 17, 18
10, 11, 12
CRH 12E/12EL 3840 1,2 3, 4, 5, 6, 7, 8, 9, 15, 16 17, 18, 19, 20
10, 11, 12, 13, 14
CRH 12E/12EL 4146 1,2 3, 4, 5, 6, 7, 8, 9, 17, 18 19, 20, 21, 22
10, 11, 12, 13, 14,
15, 16
CRH 12E/12EL 4500 1,2 3, 4, 5, 6, 7, 8, 9, 19, 20 21, 22, 23, 24
10, 11, 12, 13, 14,
15, 16, 17, 18
CRH 12E/12EL 5000 1,2 3, 4, 5, 6, 7, 8, 21, 22 23, 24, 25, 26
9, 10, 11, 12, 13,
14, 15, 16, 17, 18,
19, 20
CRH 12E 5520 1,2 3, 4, 5, 6, 7, 8, 9, 25, 26 27, 28, 29, 30
10, 11, 12, 13, 14,
15, 16, 17, 18, 19,
20, 21, 22, 23, 24
CRH 12E 6178 1,2 3, 4, 5, 6, 7, 8 9, 10, 11, 12, 27, 28, (29), 31, (32), 33,
13, 14, 15, 16, (30) 34, (35), 36
17, 18, 19, 20,
21, 22, 23, 24,
25, 26

Saddle positions in paranthesis (x), are for optional use when heavy gauge wear is expected.

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Saddle positioning
Gauge saddle system with reduced reamer diameter option
The gauge saddle system on “D”-type reaming heads makes
Diameter Saddle Marking on saddle side
it possible to reduce the reamer diameter in two steps by
step No part No
changing the gauge saddles only (see illustrations). This
option is valid on all Sandvik reaming heads that takes
I 7008-2024 o – one hole drilled
gauge saddles type 7008-2024 or 7008-2030. This option
can be used in a long raise with heavy gauge button wear II 7008-2025 o o – two holes drilled
and makes it easier to reach the rock face again after lower- III 7008-2026 o o o – three holes drilled
ing the reaming head for any service. The “D”-type gauge I 7008-2030 o – one hole drilled
saddles have different part numbers and markings (see table
II 7008-2031 o o – two holes drilled
and illustrations) in order to reduce the risk of mixing dif-
ferent types on the same reamer. III 7008-2032 o o o – three holes drilled

STEP 1 D

GAUGE SADDLE 7008-2024 or -2030

Marking STEP I

STEP 2 D - 21 mm

GAUGE SADDLE 7008-2025 or -2031

Marking STEP II

STEP 3 D - 42 mm

GAUGE SADDLE 7008-2026 or -2032

Marking STEP III

Important!
Make sure to use four gauge saddles
of the same type (same part no and
marking) together on the reamer at
all times to keep the correct profile.

14 • r aise boring he ads – user man ual

Mounting of stem
For Safety Instructions, see page 8-9.

1. 2.

Place the head on its side Clean the centre hole. Use a suitable solvent to remove
the rust protection. Apply a lot of grease before fitting the
stem

3. 4.

Insert the stem. Put a rod through the stem for easier Push the stem into position. Oil the bolts. Pre-tighten the
handling. Clean and put a lot of grease on the inlet part of bolt crosswise to 800 Nm. Tighten to full torque 1200 Nm
the stem. Use ordinary machine grease (0.5 kg)

5. Bolt 7008-9134-01
Lock washer
7008-9135-01

Nut 7008-9135
Clean the O-ring groove in the retainer ring and insert the
O-ring

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Mounting of stem
6. 7.

Clean the seal seat. Slide the V-ring over the top of the Apply silicone sealant on top of the V-ring around the
stem and push it into position. Note. Do not use the V-ring stem. Lower the retainer ring over the stem into position.
in reaming head CRH3 and CRH4 Make sure both seals are properly seated

8. 9.
O-ring

V-ring

Bolt 7008-9137

Tighten the bolts cross-wise until the retainer ring is

seated. Make-up torque 220 Nm

10.

Mount the saddles in position 1 and 2 (see picture on

page 8). The head assembly is now complete

Seal retainer

Part No. Stem fit “dia”, mm

7008-9380 340
7008-9381 360
7008-9398 390

16 • r aise boring he ads – user man ual

Mounting of cutters
For Safety Instructions, see page 8-9.

1. 2.

The positions are marked on the side of the head frame. If Lift the cutters into position. See table on page 14-16
there are two position marks, the upper one refers to the for correct positioning
position nearest the head centre
3. 4.
Bolt 7008-9119
Cutter

Saddle

Nord-Lock washer
7008-4341-19

Nut 7008-9120
Put some oil on the bolt before tightening Tighten to 300 Nm

Button row overlapping

On all Sandvik reaming heads there are button rows that This feature (overlapping) can be used if there is a CMR41
are tracking (overlapping). cutter with button row No. 1 damaged or a CMR52 cutter
with button row No. 1 or 5 damaged.
Mount them in overlapping positions to let the cutter next
to it (outside or inside) without damaged button rows cut
the rock in this track.

Row 5
Row 1 Row 1

CMR 41 CMR 52

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Cutter positioning
The cutters are to be placed in different positions, depending on which spacing is required.
25,5 mm spacing is recommended for medium to hard rock, 51 mm spacing is recommended for soft
rock.

Integral- and segmented heads

Reaming Head No. of Type of Position Position
head type dia. cutters cutter 25.5 mm spacing 51 mm spacing
mm

CRH 2 660 2 CMR 41 1

CMR 52 2 1, 2
CRH 3* 950 4 CMR 41 1, 3 1, 2
CMR 52 2, 4 3, 4
CRH 3 1060 4 CMR 41 1, 3 1, 2
CMR 52 2, 4 3, 4
CRH 3** 1084* 4 CMR 41-27 1, 3 1, 2
CMR 52-27 2, 4 3, 4
CRH 4 1420 6 CMR 41 1, 3, 5 1, 2
CMR 52 2, 4, 6 3, 4, 5, 6
CRH 5 1524 8 CMR 41 1, 5, 7 4
CMR 52 2, 3, 4, 6, 8 1, 2, 3, 5, 6, 7, 8
CRH 6/6S 1829 10 CMR 41 1, 3, 5, 7, 9 3, 4, 5, 6
CMR 52 2, 4, 6, 8, 10 1, 2, 7, 8, 9, 10
CRH 7/7S 2134 12 CMR 41 1, 3, 5, 7, 9, 11 3, 4, 5, 6, 7, 8
CMR 52 2, 4, 6, 8, 10, 12 1, 2, 9, 10, 11, 12
CRH 8/8S/8D/8L 2440 14 CMR 41 1, 3, 5, 7, 9, 11, 13 3, 4, 5, 6, 7, 8, 9, 10
CMR 52 2, 4, 6, 8, 10, 12, 14 1, 2, 11, 12, 13, 14
CRH 9L 2743 14 CMR 41 1, 3, 5, 7, 9, 11, 13 3, 4, 5, 6, 7, 8, 9, 10
CMR 52 2, 4, 6, 8, 10, 12, 14 1, 2, 11, 12, 13, 14
CRH 10D/10SD 3094 16 CMR 41 1, 3, 5, 7, 9, 11, 13, 15 5, 6, 7, 8, 9, 10, 11, 12
CMR 52 2, 4, 6, 8, 10, 12, 14, 16 1, 2, 3, 4, 13, 14, 15, 16

Note! Cutter positioning when saddle 7008-2013 is used in position 1 (when a Ø 9”, 9 7/8” stem is used in a reaming head
with Ø 340 mm stem fit or when a Ø 12 1/4” stem is used in a reaming head with Ø 360 mm stem fit):
25,5 mm spacing: pos. 1, CMR 52; pos. 2, CMR 52.
51 mm spacing: pos. 1, CMR 52; pos. 2, CMR 41.

For cutter mounting of other Sandvik cutter types, consult your local Sandvik representative.

* CRH 3 Ø 950 mm, part number 7008-1009-30, is designed for 7 7/8” stem only!

** CRH 3 Ø 1084 mm, part number 7008-1311-30, is designed for 9” or 9 7/8” stems and CMR 41-27 / CMR 52-27
cutters only!

18 • r aise boring he ads – user man ual

Cutter positioning
CRH 2 CRH 3 CRH 4 CRH 5 CRH 6
Ø 660/26” Ø 950/37 ” Ø 1420/56” Ø 1524/60 ” Ø 1829/72”
Ø 1060/42” 9
Ø 1084/43” 5
8 4 5
6 4
1 3 2
1 2 8 10
1 2 3 4 1 2 1 3
2 7 3 6
4 6
5 7

CRH 6S CRH 7 CRH 7S

Ø 1829/72” Ø 2134/84” Ø 2134/84”

10
9 12
5 7
4
5 9 6 4
4 7
2
8 10 1 2
9 1 2 11
1
3 3
8
11 6 3 5
6 8
7 10
12

CRH 8/8L CRH 8D CRH 8S

Ø 2440/96” Ø 2447/96” Ø 2440/96”

11
11
14
10 10
7
10 7
12 4
4 5 6
7 1 11 5
4 1
1 2 14 12
3 2
13 2 6
8 5 3
6 3
14 8
9 8
9 9
12 13
13

CRH 9L CRH 10D CRH 10SD

Ø 2743/108 ” Ø 3094/122” Ø 3094/122”
11 13
12
10
13 14
5 7 10
8
4
6 4 11 16 6 7
1
12 2 1 14
1 4 10
2 9 3
3
7 2
6 12 3 5 8 5 14
9
16 9 8
13 15
11
15

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Cutter positioning
The cutters are to be placed in different positions, depending on which spacing is required.
25,5 mm spacing is recommended for medium to hard rock, 51 mm spacing is recommended for soft
rock.

Extendable heads
CRH 6E
Reamer base 7008-1318-22 with Ø 340 mm stem fit
Reaming Head No. of Type of Position Position
head type dia.mm cutters cutter 25.5 mm spacing 51 mm spacing
CRH 6E 1829 10 CMR 41 1, 3, 5, 7, 9 3, 4, 5, 6
CMR 52 2, 4, 6, 8, 10 1, 2, 7, 8, 9, 10
CRH 6E 2236 12 CMR 41 1, 3, 5, 9, 11, 13 3, 4, 5, 6, 9, 10
CMR 52 2, 4, 6, 10, 12, 14 1, 2, 11, 12, 13, 14
CRH 6E 2429 14 CMR 41 1, 3, 5, 7, 9, 11, 13 3, 4, 5, 6, 9, 10
CMR 52 2, 4, 6, 8, 10, 12, 14 1, 2, 7, 8, 11, 12, 13, 14

CRH 8E
Reamer base 7008-1625-20 with Ø 390 mm stem fit
Reaming Head No. of Type of Position Position
head type dia. mm cutters cutter 25.5 mm spacing 51 mm spacing
CRH 8E 2441 12 CMR 41 1, 3, 5, 7, 9, 11 3, 4, 5, 6, 7, 8
CMR 52 2, 4, 6, 8, 10, 12 1, 2, 9, 10, 11, 12
CRH 8E 2765 14 CMR 41 1, 3, 5, 7, 9, 13, 15 3, 4, 5, 6, 7, 8
CMR 52 2, 4, 6, 8, 11, 14, 16 1, 2, 9, 11, 13, 14, 15, 16
CRH 8E 3154 16 CMR 41 1, 3, 5, 7, 13, 15, 17, 19 3, 4, 5, 6, 7, 8, 13, 14
CMR 52 2, 4, 6, 8, 14, 16, 18, 20 1, 2, 15, 16, 17, 18, 19, 20
CRH 8E 3510 18 CMR 41 1, 3, 5, 7, 13, 15, 17, 19, 21 3, 4, 5, 6, 7, 8, 13, 14
CMR 52 2, 4, 6, 8, 14, 16, 18, 20, 22 1, 2, 15, 16, 17, 18, 19, 20, 21, 22

CRH 10SE
Reamer base 7008-1630-20, Ø360 mm stem fit
Head No. of Type of Position Position
head type dia. mm cutters cutter 25.5 mm spacing 51 mm spacing

CRH 10SE 3047 16 CMR 41 1, 3, 5, 7, 9, 11, 13, 15 3, 4, 5, 6, 7, 8, 9, 10

CMR 52 2, 4, 6, 8, 10, 12, 14, 16 1, 2, 11, 12, 13, 14, 15, 16
CRH 10SE 3372 18 CMR 41 1, 3, 5, 7, 9, 11, 13, 15, 17 3, 4, 5, 6, 7, 8, 9, 10
CMR 52 2, 4, 6, 8, 10, 12, 14, 16, 18 1, 2, 11, 12, 13, 14, 15, 16, 17, 18
CRH 10SE 3696 20 CMR 41 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
CMR 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 1, 2, 13, 14, 15, 16, 17, 18, 19, 20

CRH 10E
Reamer base 7008-1031-20, Ø360 mm stem fit and 7008-1331-20, Ø390 mm stem fit
Reaming Head No. of Type of Position Position
head type dia. mm cutters cutter 25.5 mm spacing 51 mm spacing

CRH 10E 3130 16 CMR 41 1, 3, 5, 7, 9, 11, 13, 15 3, 4, 5, 6, 7, 8, 9, 10

CMR 52 2, 4, 6, 8, 10, 12, 14, 16 1, 2, 11, 12, 13, 14, 15, 16
CRH 10E 3500 18 CMR 41 1, 3, 5, 7, 9, 11, 14, 17, 19 3, 4, 5, 6, 7, 8, 9, 10
CMR 52 2, 4, 6, 8, 10, 12, 16, 18, 20 1, 2, 11, 12, 14, 16, 17, 18, 19, 20
CRH 10E 3824 20 CMR 41 1, 3, 5, 7, 9, 11, 14, 17, 19, 21 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
CMR 52 2, 4, 6, 8, 10, 12, 16, 18, 20, 22 1, 2, 14, 16, 17, 18, 19, 20, 21, 22

20 • r aise boring he ads – user man ual

Cutter positioning
CRH 6E
Ø 1829/72” Ø 2236/88 ” Ø 2429/96”

CRH 8E
Ø 2441/96” Ø 2765/109 ” Ø 3154/124” Ø 3510/138 ”

CRH 10SE
Ø 3047/120 ” Ø 3372/133” Ø 3696/146”
15

9 12
14 7
6 1
4 16
18 3
2 5
8 13
11 10

17

CRH 10E
20
Ø 3130/123” Ø 3500/138 ” 17 Ø 3824/151”
16 12 16 16
13 12 12

9 9 9
7 7 7
1 1 18 19 1 17
4 6 4 6 4
6
5 3 5 3 5
3 20 2 18 2 21
2
8 8
8
10 10
10
11 14 11 14
15 11 14
19
22

r aise boring he ads – user man ual • 21

Cutter positioning
The cutters are to be placed in different positions, depending on which spacing is required.
25,5 mm spacing is recommended for medium to hard rock, 51 mm spacing is recommended for soft
rock.

Extendable heads
CRH 10ED
Reamer base 7008-1440-20, Ø360 mm stem fit and 7008-1340-20, Ø390 mm stem fit
Reaming Head No. of Type of Position Position
head type dia. mm cutters cutter 25.5 mm spacing 51 mm spacing
CRH 10ED 3500 18 CMR 41 1, 3, 5, 7, 9, 11, 13B, 15,17 3, 4, 5, 6, 7, 8, 9, 10
CMR 52 2, 4, 6, 8, 10, 12, 14B, 16,18 1, 2, 11, 12, 13B, 14B, 15, 16,17,18
CRH 10ED 3687 20 CMR 41 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 3, 4, 5, 6, 7, 8, 9, 10,11,12
CMR 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 1, 2, 13, 14, 15, 16, 17, 18, 19, 20
CRH 10ED 3824 20 CMR 41 1, 3, 5, 7, 9, 11, 13B, 15, 17, 19 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
CMR 52 2, 4, 6, 8, 10, 12,14B, 16, 18, 20 1, 2, 13B, 14B, 15, 16, 17, 18, 19, 20
CRH 10ED 4042 22 CMR 41 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
CMR 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 1, 2,13, 14, 15, 16, 17, 18, 19, 20, 21, 22

CRH 12E/CRH 12EL

Reamer base CRH12E 7008-1338-20, CRH 12EL 7008-1335-20, Ø390 mm stem fit
Reaming Head No. of Type of Position Position
head type dia. mm cutters cutter 25.5 mm spacing 51 mm spacing

CRH 12E/12EL 3534 18 CMR 41 1, 3, 5, 7, 9, 11, 13, 15, 17 3, 4, 5, 6, 7, 8, 9, 10

CMR 52 2, 4, 6, 8, 10, 12, 14, 16, 18 1, 2, 11, 12, 13, 14, 15, 16, 17, 18
CRH 12E/12EL 3840 20 CMR 41 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
CMR 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20 1, 2, 13, 14, 15, 16, 17, 18, 19, 20
CRH 12E/12EL 4146 22 CMR 41 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
CMR 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22 1, 2, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22
CRH 12E/12EL 4500 24 CMR 41 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
CMR 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24 1, 2, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
CRH 12E/12EL 5000 26 CMR 41 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
25
CMR 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 1, 2, 15, 16, 17, 18, 19, 20, 21, 22, 23,
24, 26 24, 25, 26
CRH 12E 5520 30 CMR 41 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16
25, 27, 29
CMR 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 1, 2, 17, 18, 19, 20, 21, 22, 23, 24, 25,
24, 26, 28, 30 26, 27, 28, 29, 30
CRH 12E 6178 32 (36) CMR 41 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
25, 27, (29), 31, 33, (35) 17, 18, 19, 20
CMR 52 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 1, 2, 21, 22, 23, 24, 25, 26, 27,
24, 26, 28, (30), (32), 34, 36 28, (29), (30), 31, (32), 33, 34, (35), 36

Note!
Cutter positioning when saddle 7008-2013 is used in position 1 (when a Ø 12 1/4” stem is used in a reaming head with Ø
360 mm stem fit with exception for CRH10SE or when a Ø 13 3/4” stem is used in a reaming head with Ø 390 mm stem
fit with exception for CRH12SE):
25,5 mm spacing: pos. 1, CMR 52; pos. 2, CMR 52.
51 mm spacing: pos. 1, CMR 52; pos. 2, CMR 41.
For cutter mounting of other Sandvik cutter types, consult your local Sandvik representative.

Cutter positions in parantheses ( X ), are for optional use, when heavy gauge wear is expected.

22 • r aise boring he ads – user man ual

Cutter positioning
CRH 10ED
Ø 3500/138 ” Ø 3687/145” Ø 3824/151” Ø 4042/159 ”
16 18 20 21

12 13B
14 12 12 13B
14 12
9
7 9 9
1 17 7 7 9
6 4 1 15 19 1 16 17 7
4 6 4 15
17 6 1
3 5 20 6 4
15 2 5 19 3 5
3 2 17
8 2 15 5 22
16 3
10 8 8 2
10 16
10 8 18
14B 11 14B 10
13 11
11
18 11 13

20 18

19
CRH 12E/CRH 12EL
Ø 3534/139 ” Ø 3840/151” Ø 4146/163”
18
13 15 22 19
16 17 18 13 19 13
10 10 10

5 8
5 8 5 8
2 3 2 3 2 3
15 11
12 11 12 11
4 12 4 16
4 1 1 1 6
6 7 6 7
7

9 9 9
15 18 17 14 20 14
14 16 21 20
17

Ø 4500/177 ” Ø 5000/197 ” 21
19 19
24 25
22 16 23
16
13 10 13 10

5 8 5 8
2 3 2 3
18 12 11 17 18 12 11 17
4 1 4 1
7 6 6
7

9 14 9 14
15
21 15 24
20 23 26
20
22

Ø 5520/217 ” Ø 6178/243”
35
27
23
21 30
29 34 36
19
16 19
26
24
13 10 16
13 10

5 8
2 5 8
3 2 3
25 18 12 11 17 26 29 21 18 12 11 17 22 30
4 4 1
6 7 6
7

9 14 9 14
15
20 23
15 25

20
28 22 27 33 31
24
28
32
Mounting of segments
For Safety Instructions, see page 8-9.

CRH 6S, 7S, 8S, 10SD

CRH 6E, 8E, 10SE, 10E, 10ED Segment
Segmented heads are designed in order to facilitate
transportation through narrow openings. The reamer base
is transported with the segments dismounted until the col- Reamer base
laring site is reached.

Reaming Base head Segment No. of

head type part no. part no. cutters

CRH 6S 7008-1418-21 7008-2101-20 10

CRH 7S 7008-1421-21 7008-2101-20 12
CRH 8S 7008-1424-21 7008-2101-20 14
CRH 10SD 7008-1831-21 7008-2142-20 16

1. 2.

Clean all contact surfaces. Oil bolts, nuts, wedge and slot- Fit the upper wedge
wedge. Hook the segment on to the head as shown Bolt 7008-9134

3. 4. Bolt 7008-9134-01
Lock washer
7008-9135-01

Nut 7008-9135

Fit the slot wedge. Tighten all bolt joints to 2/3 torque Complete the segment assembly by tightening the bolt/nut
(≈800 Nm). Tighten to full torque 1200 Nm. Begin with joints. Start with 2/3 torque (≈800 Nm). Tighten to full
upper wedge. Repeat on slot-wedge torque 1200 Nm.
Example of tool combination see page 8

Segment part number: 7008-XXXX-YY

ex: 7008-2109-20 (without saddles)
7008-2109-30 (with saddles)

24 • r aise boring he ads – user man ual

Segment positioning
CRH 6E
Reamer base 7008-1318-22 with Ø 340 mm stem fit
Reaming Head No. of No. of Segment Segment
head type dia. cutters segments part number part number
mm

CRH 6E 1829 10 2 7008-2101-20

CRH 6E 2236 12 2+4 7008-2186-25 7008-2187-20

CRH 6E 2429 14 2+4 7008-2169-25 7008-2170-20

CRH 8E
Reamer base 7008-1625-20 with Ø 390 mm stem fit
Reaming Head No. of No. of Segment Segment
head type dia. cutters segments part number part number
mm

CRH 8E 2441 12 2 7008-2181-20

CRH 8E 2765 14 2+2 7008-2182-20 7008-2183-20

CRH 8E 3154 16 2+2 7008-2184-20 7008-2185-20

CRH 8E 3510 18 2+2 7008-2194-20 7008-2195-20

CRH 10SE
Reamer base 7008-1630-20, Ø360 stem fit
Reaming Head No. of No. of Segment Segment Segment
head type dia. cutters segments part number part number part number
mm

CRH 10SE 3047 16 2 7008-2134-20

CRH 10SE 3372 18 2+2 7008-2135-20 7008-2136-20

CRH 10SE 3696 20 2+2+2 7008-2135-20 7008-2136-20 7008-2138-20

r aise boring he ads – user man ual • 25

Segment positioning
CRH 6E
-2101
Ø 1829 Ø 2236 -2186 Ø 2429 -2169

-2187
-2170

CRH 8E
Ø 2441 Ø 2765 Ø 3154 -2184
-2182
19
15
13

6 7
1
20
4
-2183 3
18 -2185
2
8 5

-2181 14
16
17
Ø 3510
19
-2194
18

13

6 7
16
1 -2195
22 4
3 20
15 2
8 5

14

17
21
CRH 10SE
Ø 3047 Ø 3372 Ø 3696 -2136
-2134 15 -2135

-2135

9 12
-2136
14 7
6 1 -2138
4 16
18 3
2 5
8 13
11 10

17

26 • r aise boring he ads – user man ual

Segment positioning
CRH 10E
Reamer base 7008-1031-20, Ø360 stem fit and 7008-1331-20, Ø390 stem fit
Reaming Head No. of No. of Segment Segment Segment
head type dia. cutters segments part number part number part number
mm

CRH 10E 3130 16 base only

CRH 10E 3500 18 2+2 7008-2109-20 7008-2110-20

CRH 10E 3824 20 2+2+2 7008-2109-20 7008-2110-20 7008-2111-20

CRH 10ED
Reamer base 7008-1440-20, Ø360 stem fit and 7008-1340-20, Ø390 stem fit
Reaming Head No. of No. of Segment Segment Segment
head type dia. cutters segments part number part number part number
mm

CRH 10ED 3500 18 2+2 7008-2109-20 7008-2110-20

CRH 10ED 3687 20 2+2 7008-2152-20 7008-2153-20

CRH 10ED 3824 20 2+2+2 7008-2109-20 7008-2110-20 7008-2111-20

CRH 10ED 4042 22 2+2 7008-2144-20 7008-2145-20

Segment positioning
CRH 10E
Ø 3130 Ø 3500 Ø 3824 20 -2111
17 -2109
16 12 16 16
13 12 12
-2110 -2110
9 9 9
7 7 7
1 1 18 19 1 17
6 4 6 4 6 4

5 3 5 3 5
3 2 2 21
2 20 18
8 8 8
10 10 10

11 11
-2109
15 11 14 14
14
19
22

CRH 10ED
Ø 3500 Ø 3687
-2109 18 -2153
16

12 14 12
13B -2152
-2110
9 9
7 7
1 17 1 15
6 4 17 6 4

3 5 3 5 19
15 2 2
16
8 8
10 10
14B 11 11 13

18
20

Ø 3824 Ø 4042
20 -2111 21
-2144
12 13B
-2110
14 12
9
7
19 1 16 9
4 17 7
6
15 -2145
5 1
3 20 6 4
15 2 17
8 3 5 22
10 2
16
8 18
14B 11 -2109 10

11 13
18

19
Mounting of segments
For Safety Instructions, see page 8-9.

CRH 12E/CRH 12EL

The CRH 12E system is a user friendly design which facili-

tates transportation through narrow openings and substan-
cially reduces the time for assembly.
The reamer base is transported with the segments dis-
mounted until the collaring site is reached.

Reamer base
Segments

Lock washer
Bolt 7008-9134-01 7008-9135-01

Nut
7008-9135

Clean all contact surfaces, oil Begin with the wedge in the middle
bolts, nuts and wedges. Hook and work your way outwards. Tighten
the segments on to the head as the bolts to 2/3 torque (800 Nm).
shown. Start to tighten the upper Continue with the bolt joints on the
wedge joints. sides and at the bottom of the seg-
ments. Tighten to 2/3 torque(800 Nm).
Tighten to full torque (1200 Nm). Use
the same sequense as when tightening
to 2/3 torque.

r aise boring he ads – user man ual • 29

Segment positioning
CRH 12E/CRH 12EL
Reamer base 7008-1338-20, Ø390 stem fit, Reamer base 7008-1335-20
Reaming Head No. of No. of Segment (small) Segment (large)
head type dia. cutters segments part number part number
mm

CRH 12E 3534 18 2+2 7008-2150-20 7008-2164-20

CRH 12EL 7008-2150-25 7008-2164-25

CRH 12E 3840 20 2+2 7008-2150-20 7008-2151-20

CRH 12EL 7008-2150-25 7008-2151-25

CRH 12E 4146 22 2+2 7008-2161-20 7008-2162-20

CRH 12EL 7008-2161-25 7008-2162-25

CRH 12E 4500 24 2+2 7008-2149-20 7008-2148-20

CRH 12EL 7008-2149-25 7008-2148-25

CRH 12E 5000 26 2+2 7008-2147-20 7008-2146-20

CRH 12EL 7008-2147-25 7008-2146-25

CRH 12E 5520 30 2+2 7008-2154-20 7008-2155-20

CRH 12E 6178 32 (36) 2+2 7008-2201-20 7008-2200-20

30 • r aise boring he ads – user man ual

Segment positioning
CRH 12E/CRH 12EL
Ø 3534 Ø 3840 -2151 Ø 4146 -2162
-2164
18
13 15 22 19
16 17 18 13 19 13
10 10 10
-2150 -2150 -2161
5 8
5 8 5 8
2 3 2 3 2 3
15 11
12 11 12 11
4 12 4 16
4 1 1 1 6
6 7 6 7
7

9 9 9
15 18 17 14 20 14
14 16 21 20
17

Ø 4500 Ø 5000 Ø 5520 -2155

-2148 21 -2146 23
21
19 29 30
19 24 25
22 16 23 16 19
16 -2154
13 10 13 10 13 10
-2149 -2147
5 8 5 8 5 8
2 3 2 3 2 3
18 12 11 17 18 12 11 17 25 18 12 11 17 26
4 1 4 1 4
7 6 7 6 6
7

9 14 9 14 9 14
15
21 15 24 20
15
23 26
20 20 28 27
22 22
24

Ø 6178
35 -2200
27

34 36
19

26
24
16
13 10
-2201
5 8
2 3
29 21 18 12 11 17 22 30
4 1
7 6

9 14
15
23
25

20
33 31

28
32

r aise boring he ads – user man ual • 31

Inspection
For Safety Instructions, see page 8-9.

In order to keeep your reaming head in good working

conditioning we recommend an inspection after each raise.

Check the following.

• Wear pad diameter on stem
• For cracks in the wrench flats and in the thread of the stem
• Stem/reamer base bolt joints
• Saddle bolts
• Conditioning of the journal seats in the saddles
• Contact surface between saddle/reamer base

Check the following on the cutters.

• Button condition, use cutter gauge 7008-9445
• Seal/bearing. If the cutter is easy to rotate it needs
re-greasing, follow the instructions on page 33.

Serial number location on the different components see below.

Cutter serial number is found on the shaft end of the narrow part of The stem is marked at the bot- Head serial number is found on
the cutter and on the ball plug retainer tom flange and on the thread one side of the head frame
top

Cutter gauge 7008-9445 for measuring of button wear over the gauge button row of the cutters. The figures tell you the
percentage of the protrosion left.

32 • r aise boring he ads – user man ual

Dismounting of stem
For Safety Instructions, see page 8-9.

1. 2.

Remove the inner saddles from position 1 and 2. Dismount the seal retainer ring. Use the two releasing
Use the tool combination on page 8 holes and tighten cross-wise until the retainer ring comes
loose

3. 4.

Dismount the twelve clamping bolts. Remove the protec- Put a rod through the stem and attach the lifting equip-
tion bolts from the jacking holes in the stem flange. Insert ment. Pull the stem out
four of the loose bolts and tighten cross-wise until the
stem is released

Important!
When the stem and the saddles are
reassembled, new bolts and nuts must
be used.

r aise boring he ads – user man ual • 33

Wear pad replacement
For Safety Instructions, see page 8-9.
Replace the wear pads when the diameter D is less than
shown in the table below.
Pilot hole ØD Wear pads Wear pads thin type
diameter mm Quantity Part No.
17 7/8" 192 14 7008-9020
19" 220 15 7008-9023
19 7/8" 242 15 7008-9025-05
11" 271 15 7008-9028-05
12 1/4" 303 15 7008-9031-05
13 3/4" 341 10 7008-9034-05
15" 373 15 7008-9038-05

1. 2.

Remove the worn out wear pads by grinding away the Fix the wear pads in position with clamps. Important!
welding joint. Pre-heat the area where the wear pads are Make sure the ID of the wear pad corresponds with the
to be welded to 370-450° C. Should the temperature OD of the stem
drop to below 370°. Reheat before continuing

3. 4.

Tack weld the pads to the stem Fill the welding points properly using our recommended
welding wire.After welding, the diameter over the wear
5. pads must be checked. If some peeks exceed D-max,
grind with a silicon carbide grinding wheel

Recommended diameter over wear pads;

Pilot hole D-max, mm

17 7/8" 200
19" 228
19 7/8" 251
11" 279
12 1/4" 311
13 3/4" 349
Make the welding joints ± 10 mm longer than the wear 15" 381
pad and end with a smooth finish

34 • r aise boring he ads – user man ual

Re-greasing of cutters
For Safety Instructions, see page 8-9.
1. 2.

Remove the plastic protection cup and the snap ring Pull out the ball plug retainer

3. 4.

Remove the conical plugs (7008-9257) from the seal Clean the centre hole carefully. Install the re-greasing plug
retainers. Use proper allen key wrench (7008-9447) and attach the grease gun

5. 6.

Start pumping until grease comes out through one of the Rotate the cutter 20 revolutions. Continue to pump until
relief holes. Clean the thread and mount the plug. Put grease comes out through the other relief hole. Mount a
some Loctite222 on the thread before tightening. Use the conical plug in this hole in the same way
allen key wrench

7.

Spares for re-greasing/ cutter

Pcs Part No. Item

3 7008-9115 O-ring
2 7008-9257 Conical plug
1 7008-9114 Snap ring
1 7008-9482 Protection plug
Re-install the ball plug retainer. Mount a new snap ring 1 7008-9132-01 Cutter grease 0,4 kg tube
and a plastic protection cap together with new o-rings

r aise boring he ads – user man ual • 35

Re-greasing option
For Safety Instructions, see page 8-9.
If it is not possible to re-grease the cutter through the
centre hole as described on page 33, we recommend to
re-grease the cutter through the seal retainer.

1. 2.

Disconnect the two conical plugs in the seal retainers. Attach a grease pump and start pumping
Mount a grease nipple in one of the holes

3.

Continue to pump until grease comes out through the

relief hole in the opposite seal retainer. Rotate the cutters
± 20 revolutions. Mount two new conical plugs in each
seal retainer

36 • r aise boring he ads – user man ual

Seal replacement
For Safety Instructions, see page 8-9.
1. 2. 3.

Cut the four welding joints on the seal Remove the snap ring 7008-9111. Use a Make a puller tool by using two bolts, nuts
retainer. Use a small cutting disc. Remove hammer and a small chisel. Fill the cutter and a small U-beam. Tack weld the two
protection ring 7008-9113 with grease before dismantling the seals to bolts to the retainer ring. Remove the re-
avoid dirt coming into the bearing system tainer ring by tightening the nuts and tapping
the retainer ring with a hammer. The retainer
ring can be reused if it is not damaged

4. 5. 6.

Remove the two seal halves from both the Clean the snap ring groove, the O-ring Inspect the retainer pin 7008-9568.
retainer ring and the cutter shell. groove and the seal seat carefully. Ensure Replace if showing excessive wear
Remove the O-ring 7008-9604 from the that the seal seat is in good condition. If
journal not, file the marks and nicks. Make sure no
muck or dirt comes in to the bearing system

7. 8. 9.

Install the two seal halves (7008-9110) in Mount the O-ring 7008-9604. Mount the Mount the protection ring 7008-9113 and
both the retainer ring and the cutter shell. retainer ring carefully. E.g. use a hammer weld four joints 90° apart. Use MIG weld-
Important! Follow the mounting instruc- and clamp for smooth mounting. Mount ing. Recommended welding wire Ø 1,2 mm
tions from the seal manufacturer carefully. the snap ring 7008-9111. Note! Always OK AUT-ROD 12,51 or similar
Instructions can be obtained from your use a new O-ring and snap ring
local Sandvik representative
10.
Spares to re-seal/ cutter

Pcs Part No. Item

2 7008-9110 Seal
2 7008-9571 Seal retainer
2 7008-9111 Snap ring
Re-grease the cutter according to the re- 2 7008-9604 O-ring
greasing instruction. This completes the seal 2 7008-9113 Lock ring
change

r aise boring he ads – user man ual • 37

Transport dimensions and weights
Integral reaming heads
Note. Weights as noted in tables are only to be used as a guide.
Reaming head Transport dimensions, mm Weight incl. Weight complete
type saddles kg incl. saddles &
stem kg
A B C D
CRH 2 655 1500 800
CRH 3 850 400 826 1900 1000 2200*
CRH 4 1010 400 826 1900 1450 2650*
CRH 5 1220 400 826 1900 2050 3250*
CRH 6 1510 400 826 1900 2650 3850*
CRH 7 1720 400 826 1900 3200 4400*
CRH 8 1930 400 826 1900 3900 5100*
CRH 8D 2040 400 826 1900 4150 5350*
CRH 8L 1930 500 926 2100 4250 5550**
CRH 9 2200 500 926 2100 5100 6400**
CRH 10D 2280 500 926 2600 6750 8550***
Stem 12 1/4" – 30* 1900 1200
Stem 12 1/4" – 40** 2100 1300
Stem 13 3/4" – 40*** 2700 1800

38 • r aise boring he ads – user man ual

Transport dimensions and weights
Segmented reaming heads
Note. Weights as noted in tables are only to be used as a guide.
Item Transport dimensions, mm Weight/piece Weight complete incl.
incl. saddles saddles, segments & stem
A B C D kg kg

CRH 6S reamer base 1050 400 826 1900 2300 3950*

CRH 7S reamer base 1325 400 826 1900 2950 4600*

CRH 8S reamer base 1631 400 826 1900 3950 5600*

CRH 10SD reamer base 1560 500 926 2700 4950 8750***

Segment to CRH 6S, 7S, 8S 430 400 826 225

Segment to CRH 10SD 770 500 926 1000

Stem 12 1/4" – 30* 1900 1200

Stem 12 1/4" – 40 2100 1300

Stem 13 3/4" – 40*** 2700 1800

r aise boring he ads – user man ual • 39

Transport dimensions and weights
Extendable reaming heads
Note. Weights as noted in tables are only to be used as a guide.
Item Reamer Transport dimensions, mm Weight / piece incl.
saddles kg
Ø mm A B C D
Reamer base CRH6E - 1469 400 826 1900 2800
Segment - 2101 1829 430 400 826 225
Segment - 2186 2236 430 400 826 250
Segment - 2187 2236 430 400 826 225
Segment - 2169 2429 430 400 826 300
Segment - 2170 2429 430 400 826 375
Reamer base CRH8E - 1650 595 1023 3100 4350
Segment - 2181 2441 475 625
Segment - 2182 2765 645 750
Segment - 2183 2765 545 500
Segment - 2184 3154 785 1250
Segment - 2185 3154 545 625
Segment - 2194 3510 965 1425
Segment - 2195 3510 880 800
Reamer base CRH 10SE - 1560 590 1015 2600 6725
Segment – 2134 3047 815 700
Segment – 2135 3372 and 3696 950 1250
Segment – 2136 3372 and 3696 610 400
Segment – 2138 3696 610 500
Reamer base CRH 10E 3130 2140 590 1015 2600 7700
Segment – 2109 3500 and 3824 610 375
Segment – 2110 3500 and 3824 720 825
Segment – 2111 3824 610 500
Reamer base CRH 10ED - 2140 590 1015 2600 7550
Segment – 2144 4042 610 750
Segment – 2145 4042 965 1625
Segment – 2152 3687 785 1050
Segment – 2153 3687 610 550
Stem Ø 12 1/4” – 30 1900 1200
Stem Ø 12 1/4” – 40 2600 1600
Stem Ø 13 3/4” – 40 2600 1800
Stem Ø 15” – 50 3100 2500

Complete reamer incl. base, segments and Ø 13 3/4" stem

weight / diameter, kg
Reaming head type Ø 3130 Ø 3500 Ø 3824 Ø 3687 Ø 4042 Ø 3047 Ø 3372 Ø 3696

CRH 10E 9500 11750 12750

CRH 10ED 11750 12750 12550 14100
CRH 10SE 9925 11825 12825

40 • r aise boring he ads – user man ual

Transport dimensions and weights
CRH 12E/CRH 12EL
Note. Weights as noted in tables are only to be used as a guide.
Reaming head Transport dimensions, mm

CRH 12E/12EL A B C D E F G H J

Ø 3534 2200 1600 1105/780 1530/1205 3100/2775 2470 910 645 990
Ø 3840 2200 1600 1105/780 1530/1205 3100/2775 2800 1145 645 990
Ø 4146 2200 1600 1105/780 1530/1205 3100/2775 3000 1155 925 990
Ø 4500 2200 1600 1105/780 1530/1205 3100/2775 3230 1470 1140 990
Ø 5000 2200 1600 1105/780 1530/1205 3100/2775 3550 1700 1190 990
Ø 5520 2200 1600 1105 1530 3100 3860 1925 1783 990
Ø 6178 2200 1600 1105 1530 3100 5020 2250 2100 990
Stem Ø 13 3/4" – 50 2700
Stem Ø 15" – 50 3100

Reaming Weight
head Reamer base Large segment Small segment Ø 15" Complete incl. base,
CRH 12E kg/pce incl. saddles kg/pce incl. saddles kg/pce incl. saddles Stem, kg segments and stem, kg
CRH 12EL

Ø 3534 8200/6700 3580/2650 1250/850 2400 20260/17100

Ø 3840 8200/6700 4775/3150 1250/850 2400 22650/18200
Ø 4146 8200/6700 5360 1300 2400 23920
Ø 4500 8200/6700 5655/4600 1550/1300 2400 25010/23425
Ø 5000 8200/6700 6650/5100 1700 2400 27300
Ø 5520 8200 7750 1925 2400 29950
Ø 6178 8200 10600 2800 2400 37400

r aise boring he ads – user man ual • 41

Spare part list
Stems
Pilot hole Ø Stem Wear pad Thread Mounting kit incl. per stem part number
in mm Part no Part no Pcs dimension Item Pcs Part no

Stem with Ø 220 mm reamer fit

7 7/8" 200 7008-3220-10 7008-9020 4 5 ¾" DI22 Bolt 8 7008-9134-01
Nut 8 7008-9135
Lock washer 16 7008-9135-01
O-ring 1 7008–9170

Stems with Ø 340 mm reamer fit

9" 229 7008-3323-30 7008-9023 5 6 ¾" DI22 Bolt 12 7008-9134-01
9 7/8" 251 7008-3325-30 7008-9025-05 5 6 ¾" DI22 Nut 12 7008-9135
11" 279 7008-3428-30 7008-9028-05 5 8 ¼" DI22 Lock washer 24 7008-9135-01
12 ¼" 311 7008-3431-30 7008-9031-05 5 8 ¼" DI22 O-ring 1 7008–9136
12 ¼" 311 7008-3531-30 7008-9031-05 5 9 ¼" DI22 V-ring 1 7008-9395

Stems with Ø 360 mm reamer fit

12 ¼" 311 7008-3531-40 7008-9031-05 5 9 ¼" DI22 Bolt 12 7008-9134-01
13 3/4" 349 7008-3634-40 7008-9034-05 10 10 1/2" DI22 Nut 12 7008-9135
13 3/4" 349 7008-3634-41 7008-9034-05 10 10 1/2" DI22 Lock washer 24 7008-9135-01
13 3/4" 349 7008-3634-42 7008-9034-05 10 10 1/2" DI22 O-ring 1 7008–9316
13 3/4" 349 7008-3634-43 7008-9034-05 10 10 1/2" DI22 V-ring 1 7008-9395
Stems with Ø 390 mm reamer fit
12 ¼" 311 7008-3531-50 7008-9031-05 5 9 ¼" DI22 Bolt 12 7008-9134-01
13 3/4" 349 7008-3634-53 7008-9034-05 10 10 1/2" DI22 Nut 12 7008-9135
15” 381 7008-3638-53 7008-9038-05 15 10 1/2” DI22 Lock washer 24 7008-9135-01
O-ring 1 7008–9399
V-ring 1 7008–9128

Saddles
Saddle Mounting kit incl. per saddle part number
Part no For position Item Pcs Part no

7008-2015 Inner CRH 2 Bolt 6 7008-9134-01

7008-2004 Inner CRH 3 Ø 950 mm Nut 6 7008-9135
7008-2006-05 Inner CRH 3 Ø 1084 mm Lock washer 12 7008-9135-01
7008-2006 Inner Dowel pin Ø 20 mm 1 7008–9145
7008-2003 Gauge all CRH 3 Dowel pin Ø 50 mm 1 7008-2007-01
7008-2005 Middle
7008-2007 Gauge
7008-2024 Gauge Step 1
7008-2025 Gauge Step 2
7008-2026 Gauge Step 3
7008-2008
Semi gauge, Bolt 8 7008-9134-01
D-type reaming heads Nut 8 7008-9135
Lock washer 16 7008-9135-01
Dowel pin Ø 20 mm 1 7008–9145
Dowel pin Ø 50 mm 1 7008-2007-01
7008-2030 Gauge Step 1, CRH 12E/12EL Bolt 12 7008-9134-01
7008-2031 Gauge Step 2, CRH 12E/12EL Nut 12 7008-9135
7008-2032 Gauge Step 3, CRH 12E/12EL Lock washer 24 7008-9135-01
Dowel pin Ø 20 mm 1 7008–9145
Dowel pin Ø 50 mm 1 7008-2007-01
7008-2035 Middle HD CRH12E/12EL Bolt 10 7008-9134-01
7008-2038 Semi gauge HD CRH12E/12EL Nut 10 7008-9135
Lock washer 20 7008-9135-01
Dowel pin Ø 20 mm 1 7008–9145
Dowel pin Ø 50 mm 1 7008-2007-01
42 • r aise boring he ads – user man ual
Spare part list
Cutters
Cutter Mounting kit incl. per cutter part number
Part no Type Item Pcs Part no

7008-5141-77 CMR 41 Bolt 2 7008-9119

7008-5152-77 CMR 52 Nut 2 7008-9120
Lock washer 4 7008-4341-19

CRH 2 reaming heads

Reaming head excluding saddles Spares incl. per reaming head part number
Part no Type Item Pcs Part no

7008-0306-2520 CRH 2 / Ø 9 7/8" stem Bolt ( to fit cutter in the stem ) 2 7008-9133
7008-0406-2820 CRH 2 / Ø 11" stem
7008-0506-3120 CRH 2 / Ø 12 ¼" stem

Integral reaming heads

Reaming head excluding saddles Spares incl. per reaming head part number
Part no Type Item Pcs Part no

Reaming head with Ø 230 mm stem fit

7008-1009-20 CRH 3 (Ø 950 mm) None

Reaming head with Ø 340 mm stem fit

7008-1310-20 CRH 3 (Ø 1060 mm) None
7008-1311-20 CRH 3 (Ø 1084 mm) None

Reaming heads with Ø 340 mm stem fit

7008-1314-20 CRH 4 Bolt ( for seal reatiner ) 6 7008-9137
7008-1315-20 CRH 5 Seal retainer 1 7008-9380
7008-1018-20 CRH 6
7008-1021-20 CRH 7
7008-1024-20 CRH 8
7008-1924-20 CRH 8D

Reaming heads with Ø 360 mm stem fit

7008-1324-20 CRH 8L Bolt ( for seal reatiner ) 6 7008-9137
7008-1027-20 CRH 9L Seal retainer 1 7008-9381
7008-1931-20 CRH 10D

r aise boring he ads – user man ual • 43

Spare part list
Segmented reaming heads
Reaming head excluding saddles Spares incl. per reaming head part number
Part no Type Item Pcs Part no

Reaming heads with Ø 340 mm stem fit

7008-1418-21 CRH 6S Bolt ( for seal reatiner ) 6 7008-9137
7008-1421-21 CRH 7S Seal retainer 1 7008-9380
7008-1424-21 CRH 8S Wedge ( to fit segment ) 2 7008-9274
Cover plate ( segment seat ) 2 7008-9279
Slot wedge unit 2 7008-9378
Reaming heads with Ø 360 mm stem fit
7008-1831-21 CRH 10SD Bolt ( for seal reatiner ) 6 7008-9137
Seal retainer 1 7008-9381
Wedge ( to fit segment ) 4 7008-9274
Cover plate ( segment seat ) 2 7008-1431-01
Slot wedge unit 4 7008-9378

Extendable reaming heads

Reaming head excluding saddles Spares incl. per reaming head part number
Part no Type Item Pcs Part no

Reaming heads with Ø 340 mm stem fit

7008-1318-22 CRH 6E Bolt (to be used in threaded holes ) 48 7008-9134-03
Bolt (for seal retainer ) 6 7008-9137
Seal retainer 1 7008-9380
Wedge (to fit segments ) 6 7008-9609
Cover plate ( segment seat ) 6 7008-9279
Slot wedge unit 4 7008-9378
Reaming heads with Ø 390 mm stem fit
7008-1625-20 CRH 8E Bolt (for seal retainer ) 6 7008-9137
Seal retainer 1 7008-9398
Wedge (to fit “small” segments ) 2 7008-9483
Wedge (to fit “large” segments ) 6 7008-9484
Cover plate (“small” segment seat ) 2 7008-1625-01
Cover plate (“large” segment seat ) 2 7008-1625-02
Cover plate (-2007 saddle ) 2 7008-9352
Reaming heads with Ø 360 mm stem fit
7008-1631-21 CRH 10SE Wedge ( to fit segment ) 12 7008-9348
Cover plate ( segment seat on CRH 10E, 10ED ) 6 7008-9349
Cover plate ( -2007 saddle on CRH 10E, 10ED ) 2 7008-9352
Cover plate ( -2005 saddle on CRH 10ED ) 2 7008-9453
7008-1031-20 CRH 10E Bolt ( for seal reatiner ) 6 7008-9137
7008-1440-20 CRH 10ED Seal retainer 1 7008-9381
Reaming heads with Ø 390 mm stem fit
7008-1331-20 CRH 10E Bolt ( for seal reatiner ) 6 7008-9137
7008-1340-20 CRH 10ED Seal retainer 1 7008-9398
Wedge ( to fit segment ) 12 7008-9348
Cover plate ( segment seat on CRH 10E, 10ED ) 6 7008-9349
Cover plate ( -2007 saddle on CRH 10E, 10ED ) 2 7008-9352
Cover plate ( -2005 saddle on CRH 10ED ) 2 7008-9453
Reaming heads with Ø 390 mm stem fit
7008-1335-20 CRH 12EL Bolt ( for seal reatiner ) 6 7008-9137
7008-1338-20 CRH 12E Seal retainer 1 7008-9398
Wedge ( to fit “small segment” ) 4 7008-9483
Wedge ( to fit “large segment” ) 10 7008-9484
Bolt ( to be used in threaded holes ) 48 7008-9134-03
Slot wedge ( optional ) (8) 7008-9378
Cover plate ( “ small segment “ seat ) 2 7008-1338-01
Cover plate ( “ large segment “ seat ) 2 7008-1338-02
44 • r aise boring he ads – user man ual
Spare part list
Segments
Segment For reaming head Spares incl. per segment part number
excluding saddles
Part no Type Item Pcs Part no
7008-2101-20 CRH 6S Bolt 6 7008-9134-01
7008-2169-25 CRH 6E Nut 6 7008-9135
7008-2186-25 CRH 6E Lock Washer 12 7008-9135-01
Bolt 1 7008-9335
Wedge ( lower key ) 1 7008-9334
7008-2170-20 CRH 6E (gauge) Bolt 4 7008-9134-01
7008-2187-20 CRH 6E (gauge) Nut 4 7008-9135
Lock Washer 8 7008-9135-01
Bolt 1 7008-9335
Wedge ( lower key ) 1 7008-9334

7008-2181-20 CRH8E ( large ) Bolt 17 7008-9134-01

7008-2182-20 CRH8E ( large ) Nut 17 7008-9135
7008-2184-20 CRH8E ( large ) Lock Washer 34 7008-9135-01
7008-2194-20 CRH8E ( large )
7008-2183-20 CRH8E ( small ) Bolt 5 7008-9134-01
7008-2185-20 CRH8E ( small ) Nut 5 7008-9135
7008-2195-20 CRH8E ( small ) Lock Washer 10 7008-9135-01

7008-2142-20 CRH 10SD Wedge ( lower key ) 1 7008-9334

Bolt 1 7008-9335
7008-2109-20 CRH 10E ( small ) Bolt 6 7008-9134-01
7008-2111-20 CRH 10E ( small ) Nut 6 7008-9135
7008-2136-20 CRH 10SE ( small ) Lock washer 12 7008-9135-01
7008-2138-20 CRH 10SE ( small )
7008-2144-20 CRH 10ED ( small )
7008-2153-20 CRH 10ED ( small )
7008-2110-20 CRH 10E ( large ) Bolt 11 7008-9134-01
7008-2134-20 CRH 10SE ( large ) Nut 11 7008-9135
7008-2135-20 CRH 10SE ( large ) Lock washer 22 7008-9135-01
7008-2145-20 CRH 10ED ( large ) Wedge (to fit segment on 10E+ED) 2 7008-9348
7008-2152-20 CRH 10ED ( large ) Cover plate (to fit segm. on 10E+ED) 1 7008-9349
7008-2147-20/-25 CRH 12E/12EL ( small ) Bolt 17 7008-9134-01
7008-2149-20/-25 CRH 12E/12EL ( small ) Nut 17 7008-9135
7008-2150-20/-25 CRH 12E/12EL ( small ) Lock washer 34 7008-9135-01
7008-2154-20 CRH 12E ( small )
7008-2201-20 CRH 12E ( small )
7008-2161-20/-25 CRH 12E/12EL ( small )
7008-2146-20/-25 CRH 12E/12EL ( large ) Bolt 29 7008-9134-01
7008-2148-20/-25 CRH 12E/12EL ( large ) Nut 29 7008-9135
7008-2151-20/-25 CRH 12E/12EL ( large ) Lock washer 58 7008-9135-01
7008-2155-20 CRH 12E ( large )
7008-2162-20/-25 CRH 12E/12EL ( large )
7008-2164-20/-25 CRH 12E/12EL ( large )
7008-2200-20 CRH 12E ( large )

r aise boring he ads – user man ual • 45

Spare part list
Assembly tools
Item Part no

Complete tool box 7008-9420

Items included in tool box Part no Items included in tool box Part no

Torque wrench, L=1050 mm 7008-9421 Wrench, hex= 19 mm 7008-9429

Torque wrench, L=800 mm 7008-9427 Wrench, hex= 36 mm 7008-9430
Torque multiplier ( X 4 ) 7008-9422 Hexagon spanner, hex= 3/16" 7008-9447
Extension bar, L= 102 mm 7008-9431 Hexagon spanner, hex= 14 mm 7008-9446
Extension bar, L= 152 mm 7008-9432 Hexagon spanner, hex= 19 mm 7008-9426
Extension bar, L= 228 mm 7008-9433 Sealant ( tube 0,4 kg ) 7008-9434
Power socket hex bit, 19 mm 7008-9449 Applyer for sealant 7008-9435
Power socket, 19 mm 7008-9437 File 7008-9440
Power socket, 24 mm 7008-9428 Wire brush 7008-9441
Power socket, 36 mm 7008-9425 Grease Note! Not for re-greasing cutters! 7008-9443
Power socket, 36 mm long 7008-9439 Steel scraper 7008-9444
Adaptor socket, 1" box to ¾" pin 7008-9438 Cutter gauge 7008-9445
Adaptor socket, ¾" box to 1" pin 7008-9442 Bolt ( to jack out stems ) 7008-9448
Inspection report
Raise No.: Date:
Reaming head: CRH Dia.: mm
Reaming head No:
Stem dia.: mm
Stem No.:

Stem check list Saddle check list

Wear pad dia.: mm Bolt joints OK: Yes No

Wear pad OK: Yes No OK for use

in next raise: Yes No
Wrench flats OK: Yes No
Others:
Thread OK: Yes No

Bolt joints OK: Yes No

Stem OK for use

in next raise: Yes No

Other: Sign:

Cutter check list

Pos Cutter Re-grease Seal change Button Total Others
Serial No. Type Yes No Yes No Life % Meters

11

12

13

14

15

16

17

18

19

10

11

12

13

14

15

16

r aise boring he ads – user man ual • 47

48 •
Visual inspection – Cutter

Ref No: ........................................ Location: ................................ Date: .................... Sign:.............................

r aise boring he ads

–
Pos Cutter Type of cutter service Button Number of Misc.
Serial No. Type OK Re.grease Seal change Open life % metres / hours

user man ual

11
12
13
14
15
16
17
18
19
10
11
12
13
14
15
16

Notes:
 Visual inspection – Full area boring equipment

Ref No: ........................................ Location: ................................ Date: .................... Sign:.............................

Part No. Serial No. Recommended service

Notes:

r aise boring he ads

–
user man ual
• 49
 Sandvik Mining
SE-811 81 Sandviken, Sweden. Tel +46 26 26 20 00 Fax +46 26 26 02 30

HR-13121d