Epiroc Grind Matic HG User manual

Grind Matic HG
Operator’s instructions
Spare parts list

2
Any unauthorized use or copying of all or part of the contents of
this publication is prohibited.This applies in particular to trade-
marks, model denominations, spare part numbers and drawings.
Subject to alteration without prior notice.
© Copyright 2017.
Epiroc DrillingTools AB, Fagersta, Sweden
Original instructions.
Contents
Safety instructions ������������������������������������������������������2
Technical data ��������������������������������������������������������������3
General �������������������������������������������������������������������������3
Applications �����������������������������������������������������������������3
Technical description���������������������������������������������������3
General care instructions��������������������������������������������3
Setting up for grinding������������������������������������������������3
Grinding������������������������������������������������������������������������4
Maintenance ����������������������������������������������������������������5
Recommended lubricants�������������������������������������������8
Consumables ���������������������������������������������������������������6
Spare parts list�������������������������������������������������������������8
Before using the machine, read the operator’s
instructions carefully and then put them in a
safe place for future reference.
It can be dangerous to use the machine if the
care and maintenance instructions are not
followed carefully.
Emergency STOP.
Always replace damaged or illegible signs�
Ordering No. 9500-3161

3
Technical data
Air pressure, max. 7 bar
Air requirement (at 6 bar)
off-load
on-load
50 l/s
42 l/s
Water pressure, max 4.5 bar
Speed, max. 17 000 r/min
Hose sizes
air
water
12.5 mm (1/2")
6.3 mm (1/4")
Weight excluding hoses 2.8 kg
Sound pressure level* 91 dB(A)
Sound power level ** 104 dB(A)
Vibration level *** < 2.5 m/s2
Ordering No. 9542
*Measuring of sound pressure level according to PN8NTC1.2,
spread in measuring method and production 3dB(A)
**Measuring of sound power level according to PN8NTC1.2,
spread in measuring method and production 3dB(A)
***Measuring of vibration according to EN/ISO 8662
Accessories delivered with the machine
Description Product code
Allen key (2 mm) 9500-2736
Allen key (3 mm) 9500-2737
Allen key (5 mm) 9500-2738
Grease gun 9500-2739
Seal kit 9500-2779
Support ring 9500-2781
Seat 9500-2780
Adjustable angle connector 9500-2795
Pipe (L=0.3 m) 9500-2785
Hose clamp (26–38 mm) 9500-2720
Hose (PVC 03) 9500-2791
Nipple 9500-2743
Hose clamp (7–8.5 mm) 9500-2716
Hose (PVC, 0.1 m) 9500-2746
Claw coupling (6.3 mm, 1/4") 9500-0068
Hose clamp (11–13 mm) 9500-2717
Operators instructions and spare parts list 9852 2337 01
General
The Secoroc HG is an air-powered grinding machine for button
bits.The grinding cup can be cooled with either air or water.
The specially composed grinding medium in the grinding cups
contributes greatly to the rapid material-removal rate of the ma-
chine. With the Secoroc HG, you can grind all kinds of button bit,
from tapered bits and threaded bits to large DTH drill bits.There
is a wide range of grinding cups for the machine to suit different
button sizes and shapes. Since the machine has a relatively low
air consumption, it is possible to grind drill bits on the rig while
drilling is in progress.
Safety instructions
• Before using the machine, read through the operator’s instruc-
tions carefully.
• Important safety information is given at various points in these
instructions.
• Special attention must be paid to the safety information con-
tained in frames and accompanied by a warning symbol (triangle)
and a “signal word“, as shown below:
Indicates an immediate risk that WILL result in serious injury
or death if the warning is not observed.
DANGER
Indicates hazards or hazardous procedures which COULD
result in serious injury or death if the warning is not observed.
WARNING
• Indicates hazards or hazardous procedures which COULD
result in injury or damage to equipment if the caution is not
observed.
• Use approved spare parts only. Any damage or malfunction that
can be attributed to the use of unauthorized spare parts is not cov-
ered by the machine warranty and invalidates product liability.
CAUTION
• Use approved spare parts only. Any damage or malfunction that
can be attributed to the use of unauthorized spare parts is not
covered by the machine warranty and invalidates product liability.
Also observe the following general safety
instructions:
• Make sure that there are no other personnel close to the grind-
ing machine while grinding is in progress.
• Always wear goggles, protective clothing, steel toe safety shoes,
gloves and hearing protection during grinding and handling of
grinding bits. Any local regulations must also be observed.
• Wear an approved dust mask or arrange an effective dust-extrac-
tion system.This is especially important when grinding indoors.
•The machine must not be used for any purpose other than that
for which it is intended. See “Applications“.
•The machine must not be modified without the permission of the
manufacturer. Modifications not approved by Epiroc DrillingTools
AB can incur the risk of serious injury to yourself and others.
• Before intervening in the air or electrical systems, make sure
there is no pressure in the air system and that the electrical sys-
tem is shut down.
• Beware of the risk of fire and explosion that could be initiated by
sparks from the grinding work.

4
Setting up for
grinding
• Always observe all safety regulations and instructions.
• Do not connect the grinding machine to air pressures higher
than 7 bar.
• Check that the compressed-air hose is connected to the
machine correctly. If not, the hose can come loose and whip
around dangerously, with the risk of injury to personnel.
• Before removing or fitting a grinding cup, always vent and dis-
connect the incoming compressed-air hose.
•The grinding cup must be approved for the maximum permiss-
ible speed of the grinding machine.
CAUTION
Grinding
• Always check that there are no traces of explosive in the
flushing holes of the drill bit.To clean out the flushing holes,
ONLY a wooden stick, a length of copper wire or flushing
water may be used.
• Beware of the risks of fire or explosion that might be initi-
ated by sparks from the grinding work.
DANGER
•The exhaust air from pneumatic components contains oil.To
inhale oil mist is bad for your health. Be sure to adjust the lubri-
cator to give the correct dosage of oil.
• Make sure that the grinding station or worksite is well venti-
lated.
• Always wear protective goggles, protective clothing, protec-
tivee gloves, ear protectors and an approved dust mask when
grinding. Any local regulations must also be observed.
• Before changing the grinding cup, always vent and disconnect
the compressed-air hose.
• Before removing the drill bit from the holder, always switch off
the air supply to the table motor.
CAUTION
Applications
The Secoroc HG is intended for grinding button bits only.
Technical
description
The Secoroc HG is part of a complete hand-grinding system
wconsisting of the grinding machine, grinding cup with grinding
medium and a specially designed chuck.
The stainless-steel grinding cups are manufactured using a
method that gives very good precision.The cups are fitted with a
rubber bushing which serves to reduce the vibrations that can be
transmitted from the grinding cup to the grinding machine.
The ergonomically positioned handles on the grinding machine
give the operator a better working position and better control of
the machine throughout the grinding operation.
The patented chuck has been specially designed for quick and
easy changing of the grinding cup.
The Secoroc HG is intended for a working air pressure of 6–7 bar.
This pressure must never be exceeded.
General care
instructions
• The machine must always be powered by lubricated com-
pressed air, which increases the service life of the machine. If the
air supply is not lubricated, connect a lubricator (available as an
accessory) into the handle of the machine.
• Keep the machine clean.
• Make sure that the compressed air is clean and dry.
• Make sure that the hoses are of the correct sizes (see “Technical
data”).
• Always blow clean the air hose before connecting it to the
machine.
• Take care when connecting the air hose to the machine.
• Lubricate the machine regularly. Follow the lubricating instruc-
tions carefully.
• If the machine is to be left idle for a long time, make sure that it
is generously lubricated before storage.
• Before moving the grinding machine to another workplace,
always disconnect the compressed-air hose.

5
Changing the grinding cup and chuck
Before fitting the grinding cup, smear the shaft of the cup with a
rust-inhibiting agent such as Shell Ensis Compound 356 or similar.
General rules
Use grinding cups of the right shape and size for the buttons that
are to be ground.The drill bit must be properly secured for grind-
ing, so that it cannot move. Pressing the grinding cup too hard on
to the cemented-carbide button will reduce the service life of the
cup. Both the grinding cup and the cemented-carbide button can
be damaged by excessive heat generation.
• Be aware that the grinding cup is hot after grinding.
CAUTION
A new grinding cup must always be “run in”. Start grinding care-
fully and increase the feed pressure gradually.This will increase
the service life of the grinding cup substantially.
Notice: If anything other than original grinding cups are used,
Epiroc DrillingTools AB will not accept liability for any faults or
damage, or the consequences thereof.
Grinding hints
The rate of bit wear depends on the rock formation, and is highest
in rocks with a high quartz content. A suitable grinding interval
should be determined according to the rate of bit wear. It is more
economical to regrind too early rather than to suffer poor penetra-
tion rates and risk damaging the drill bit through overdrilling.
Following are a few hints about the care of drill bits.
When to regrind
Button bits should be reground
when the penetration rate
drops, or if any of the cement-
ed-carbide buttons are dam-
aged (fractured buttons should
be ground flat). It is both
practical and economical to
redress the buttons when the
wear flat reaches about 1/2 of the diameter of the button.
Look out for “snake skin”
If microscopic fatigue cracks – so-
called “snake skin” – begin to
appear on the cemented carbide
buttons, the cracks must be ground
away. In any event, bits should be
reground after 300 metres of
drilling at the most.This should be
done even if there are no visible signs of wear and the penetra-
tion rate continues to be good. If snake-skin is not removed, the
cracks will deepen and ultimately result in button fracture.
Do not grind away too much cemented carbide
Do not grind too much on the top of the
buttons. Let a few millimetres of the wear
flat remain on top of the button.
Always grind broken buttons flat
A drill bit can remain in service as
long as the gauge buttons maintain
the diameter of the bit. Fractured
buttons must always be ground flat to
prevent chips of cemented carbide
from damaging the other buttons.
Avoid grinding the perimeter
2 mm
Min
0,5
Gauge button anti-taper has to be removed by grinding, although
excessive reduction of the bit diameter should be avoided. Leave
about 2 mm of the wear flat.If necessary, remove some of the
bit-body steel below the gauge buttons, so that a clearance (taper)
of 0,5 mm is maintained. If the flushing holes start to deform,
open them up with the aid of a rotary burr or steel file.
Grinding instructions
To obtain the correct button shape, the grinding machine should
be handled as follows:
• When grinding spherical cemented-carbide buttons, move the
grinding machine with GC cup evenly over and around the centre
of the button.
• When grinding ballistic cemented-carbide buttons, hold the
grinding machine with GC-T cup upright over the button.
• Do not press too hard.The weight of the machine itself is usually
sufficient feed force.
The diamond-impregnated grinding cup can also be used to
remove small amounts of steel from around the button. However,
excessive grinding of steel will soon clog up the grinding cup.
If this happens, the cup can be “opened up” again by rubbing it
against a whetstone (available as an accessory), or by rotating it
against a discarded silicon-carbide grinding wheel.The right cup
to use for removing steel from around the button is a GC-B boron-
nitride cup. Grind down the steel by about 1,5–2 mm by holding
the machine directly over the button.
The Secoroc HG is delivered equipped for air cooling of the
grinding cup. A kit for converting the machine for water cooling is
included in the package.

6
Maintenance
• Before starting work on any of the systems, make sure that
there is no pressure in the air system and cooling system.
High pressure air can escape, with the risk of injury to the eyes
and skin.
WARNING
• Check that the compressed-air hose is connected to the
machine correctly. If not, the hose can come loose and whip
around dangerously, with the risk of injury to personnel.
CAUTION
See drawings on pages 8-11 for reference, or drawing on the
inside of the cover.
Normal care
Blow the machine clean and fill with a little oil at the end of each
shift. Clean the strainer (60) regularly so that it does not restrict
the air supply to the machine.Thorough servicing and inspection
of the machine should be carried out after every 500 hours of
operation, or once every 6 months.
Lubrication
The motor should be lubricated by atomized oil in the com-
pressed air.The best way to achieve this is to connect an oil-mist
lubricator into the air line.The lubricator should be located at the
same height or higher than the grinding machine, no more than
7 meters away from the machine. Otherwise, it is recommended
that a lubricator (ordering No. 9500-2750) is connected into the
throttle handle of the machine. Before starting the machine each
day, check that the lubricator is full of oil.
The throttle and ball bearing should be greased during regular
maintenance of the machine.
The ball bearing must be greased via the grease nipple after every
20 hours of operation.The recommended quantity of grease is 1
cm
3
, which can be administered by approx. 4 strokes of the grease
gun 9500-2739.
Use lubricants of good quality. See the list of recommended
lubricants.
Other maintenance
The strainer (60) at the air connection should be cleaned fre-
quently so as not to restrict the air supply and cause the machine
to operate with reduced power.
When using water flushing, the O-ring (25) should be changed
regularly. If there is an obvious flow of water through the drain-
age hole (47) in the upper part of the machine, change the seal
rings (37) and O-rings (36) and (38).
The machine should be stripped for thorough cleaning and in-
spection every 6 months. If the machine is in daily use, this should
be carried out after every 3 months of operation.
Flushing air
The Secoroc HG is delivered equipped for air flushing. Flush-
ing air is taken directly from the air inlet port for the motor.The
adjustment screw (45) must be fully tightened.
Connecting the flushing water
• If the grinding cup is to be cooled with water, the conversion kit
must be fitted.
• Remove the upper part of the machine, the screw, plug and gas-
ket. Fit the parts (35–38) and (41–42), and fit the locking clip (39) to
the shaft (32).
• Mount the upper part (44) together with the gasket (40). Fit the
adjustable angle connector (88) together with the hose connection
parts (89–95).
• Water is connected to the machine by means of a 6,3 mm (1/4”)
hose.
•The water pressure must not exceed 4.5bar (450 kPa or 4.5 kp/
cm2).
• Use cold water only.
•The water flow can be regulated by means of the adjustment
screw (45).
Rust preventive measures when using
water flushing
To avoid corrosion caused by the flushing water, it is important to
do the following:
Before fitting the grinding cup, its shaft must be smeared with a
rust-inhibiting agent such as Shell Ensis Compound 356 or similar.
At the end of every grinding session, blow the machine clean and
lubricate according to one of the following methods:
1. Remove the grinding cup. Blow out the water hose with com-
pressed air and then dip the chuck into a rust-inhibiting agent.
2. Remove the grinding cup. Pour a little oil directly into the water
hose and blow through with compressed air until oil mist comes
out of the chuck.
Recommended
lubricants
Brand Air-tool oil Grease
Atlas Copco Air Oil(–30 to +50 °C)
BP Energol RD-E46 Energrease LS-EP2
Esso Rockway EP 68 Uniway EP 2 N
Q8 Q8 Chopin 46 Q8 Rembrant EP2
Mobil Almo Oil 525 Mobilux EP 2
Shell Torcula 68/32 Alvania grease EP2
Texaco Aries 32 Texando FO 20 S
Kluber Isoflex NBU 15
SKF LG EP 2

7
Consumables
Product code
Lubricator 9500-2750
To be fitted to the machine throttle-handle.
Required if there is no oil-mist lubricator in the
air supply line.
Grinding cups
Button size, mm Designation Product No Product Code
For spherical buttons
7 GC-7 87002566 9500-2566
8 GC-8 87002567 9500-2567
9 GC-9 87002568 9500-2568
10 GC-10 87002569 9500-2569
11 GC-11 87002570 9500-2570
12 GC-12 87002571 9500-2571
13 GC-13 87002572 9500-2572
14 GC-14 87002573 9500-2573
15 GC-15 87002574 9500-2574
16 GC-16 87002575 9500-2575
18 GC-18 87002576 9500-2576
20 GC-20 87002577 9500-2577
For ballistic buttons
7 GC-7T 87002579 9500-2579
8 GC-8T 87002580 9500-2580
9 GC-9T 87002581 9500-2581
10 GC-10T 87002582 9500-2582
11 GC-11T 87002583 9500-2583
12 GC-12T 87002584 9500-2584
13 GC-13T 87002585 9500-2585
14 GC-14T 87002586 9500-2586
15 GC-15T 87002587 9500-2587
16 GC-16T 87002588 9500-2588
Boron nitride grinding cups for removal of steel
7-8 GC-8B 87002700 9500-2700
9-10 GC-10B 87002701 9500-2701
11 - 1 2 GC-12B 87002702 9500-2702
13-14 GC-14B 87002703 9500-2703
15-16 GC-16B 87002704 9500-2704
17-18 GC-18B 87002840 9500-2840
19-20 GC-20B 87002841 9500-2841
Tightening torque guide
Ref�
No
Tighten-
ingTorque,
Nm 1)
Thread
2)
Width
across
flats,
mm
Use Tool
Product
No�
Product
code
8/23 - R 5 87002738 9500-2738
8/32 - L - - -
20 10 R 5 87002738 9500-2738
23 40 R 21 - -
32 25 L 14 - -
47 - R 2 87002736 9500-2736
48 - R 3 87002737 9500-2737
50 - R 5 87002738 9500-2738
56 10 R13 - -
62 50-70 R 33 - -
75 10 R 5 87002738 9500-2738
78 - R 40 - -
84 - R 24 - -
1)Tightening torque (1 kpm = 9,81 Nm; 1 lbf.ft =1,36 Nm)
2) R = Right-hand thread, loosened counter-clockwise
L= Left-hand thread, loosened clockwise
Grinding templates for button bits
8
9
10
10,95
12,7
14,5
7
Min.
0,5
Regrind when flat
is 173 of button dia.
D
D/3
Product No� Product code
Button bits, spherical 90002944 9104
Button bits, ballistic 90503414 9105
Button bits DTH, spherical 90510753 9129
Button bits DTH, ballistic 90510758 9130

8
76 40
44
48
46
45
43
47
84 85 8687
Seal kit
49
40
39
35
36
37
38
37
36
35
34
42
41
32
3
5
6
7
40
32
34
12
11
8
9
13
14
15
16
19
18
21
20
24
25
23
26
27
28
29
30
Parts 34-40
Spare parts list

9
Ref Product No� Product code Qty Description Specification
1 - - 1 Motor casing
3 87002721 9500-2721 1 Ball bearing 6201-RS
4 87002790 9500-2790 1 End plate, complete Ref 5-6
5 - - 1 End plate
6 87002705 9500-2705 2 Pin CP 3h6x8
7 87003218 9500-3218 1 Cylinder
8 87002777 9500-2777 1 Rotor M17x0,75
9 87002789 9500-2789 1 Vane kit 4 pcs incl.
10 87002753 9500-2753 1 End plate, complete Ref 11-12
11 - - 1 End plate
12 87003219 9500-3219 1 Pin CP 3h6x14
13 87002751 9500-2751 1 Spacer
14 87002722 9500-2722 1 Ball bearing 3203 C2
15 87002740 9500-2740 1 Seal ring 3203 JV
16 87002752 9500-2752 1 Spacer
17 87002775 9500-2775 1 Bearing casing, complete Ref 18-19
18 - - 1 Bearing casing
19 87002724 9500-2724 1 Nipple
20 87002711 9500-2711 3 Screw MC6S 6x22 12.9
21 87002714 9500-2714 3 Washer FBB 6,5
22 87002786 9500-2786 1 Quick change chuck, compl. Ref 23-29
23 - - 1 Holder
24 87002729 9500-2729 1 O-ring 9,3 x 2,4
25 87002727 9500-2727 1 O-ring 6,3 x 2,4
26 87002723 9500-2723 3 Ball 5 mm
27 87002788 9500-2788 1 Spring
28 87002787 9500-2787 1 Sleeve
29 87002715 9500-2715 1 Lock ring RW 16
30 - - 1 Damping ring *
32 87002778 9500-2778 1 Shaft
33 87002779 9500-2779 1
Seal kit Ref 34-40
34 87002726 9500-2726 1 O-ring **5,3 x 2,4
35 87002742 9500-2742 1 Spring washer
36 87002728 9500-2728 2 O-ring 7,3 x 2,4
37 - - 2 Seal ring
38 87002731 9500-2731 2 O-ring 15,1 x 1,6
39 87002782 9500-2782 2 Lock part
40 87002784 9500-2784 1 Gasket
41 87002781 9500-2781 1 Support ring
42 87002780 9500-2780 1 Seat
43 87002776 9500-2776 1 Upper part, complete Ref 44-49
44 - - 1 Upper part
45 87002749 9500-2749 1 Adjustment screw
46 87002734 9500-2734 1 O-ring 7,65 x 1,78
47 87002709 9500-2709 1 Stop screw SK6SS 4x6
48 87002710 9500-2710 4 Screw MC6S 4x20
49 87002713 9500-2713 4 Washer BRB 4,3
* Delivered with the grinding cups.
When ordering spare parts, please state the model designation of the grinding machine, the part number and description of the desired part
(not the Ref No.) and also the production number of the machine (see machine data plate).
Use approved spare parts only. Any damage or malfunction that can be attributed to the use of spare parts not approved by Secoroc is not
covered by the company’s warranty and will invalidate product liability.

10
Spare parts list
Throttle handle, complete
Conversion kit
67 68 63 65 64 66
51
71
70
58 59 60 61 62
56 57
545355
72 73 74 75
67
84
97
88
89 90 91 93 92 96 94 95
Lubricator
80
82 83 81
79 80 77 78
Support handle, complete

11
When ordering spare parts, please state the model designation of the grinding machine, the part number and description of the desired part
(not the Ref No.) and also the production number of the machine (see machine data plate).
Use approved spare parts only. Any damage or malfunction that can be attributed to the use of spare parts not approved by Secoroc is not
covered by the company’s warranty and will invalidate product liability.
Ref� Product
No�
Product
code Qty Description Specification
87002907 9500-2907 1 Throttle
handle,
complete
Ref 51-75
50 87002735 - 1 Plug 1/8”
51 - - 1 Handle
52 87002908 9500-2908 1 Valve kit,
complete
Ref 53-57
53 - - 1 Lever
54 - - 1 Lever
guide
55 87002909 9500-2909 1 Bearing
needle
2 x 17,8
56 - - 1 Bushing
57 87002910 9500-2910 1 Pin 6 x 24
58 87002911 9500-2911 1 Valve
59 87002912 9500-2912 1 Spring
60 87002913 9500-2913 1 Strainer
61 87002914 9500-2914 1 O-ring 21,4 x 2,4
62 87002915 9500-2915 1 Adapter BSP ½",G ½"
87002916 9500-2916 1 Latch, com-
plete
Ref 63-68
63 - - 1 Latch lever
64 - - 1 Latch
65 87002917 9500-2917 1 Spring
66 87002918 9500-2918 1 Pin 2 x 16
67 - - 1 Staple
68 87002919 9500-2919 2 Screw MFTS 3x10
69 87002920 9500-2920 1 Lever,
complete
Ref 70-71
70 - - 1 Lever
71 87002921 9500-2921 1 Bearing
needle
4 x 29,8
72 - - 1 Strainer
73 87002732 9500-2732 1 O-ring 32,1 x 1,6
74 87002714 9500-2714 2 Washer FRR 6,5
75 87002712 9500-2712 2 Screw MC6S 6x20
Ref� Product
No�
Product
code Qty Description Specification
87002766 9500-2766 1 Support
handle,
complete
Ref 77-83
77 87002767 9500-2767 1 Sleeve,
complete
78 87002758 9500-2758 1 Lock nut
79 87002765 9500-2765 1 Plunger
80 87002768 9500-2768 2 Plunger
ring
81 87002755 9500-2755 1 Spring
82 87002757 9500-2757 1 Silencer
cover
83 87002756 9500-2756 1 Retainer
ring
84 87002792 9500-2792 1 Hose
nipple
½"
85 87002794 9500-2794 1 Hose ½"
86 87002793 9500-2793 1 Claw cou-
pling
½"
87 87002718 9500-2718 2 Hose
clamp
16-22 mm
88 87002795 9500-2795 1 Angle con-
nector
89 87002785 9500-2785 1 Pipe L = 0,3 m
90 87004757 95004757 1 Hose
clamp
32-44 mm
91 87002791 9500-2791 1 Hose PVC 03
92 87002743 9500-2743 1 Nipple
93 87002716 9500-2716 2 Hose
clamp
7-8,5 mm
94 87002746 9500-2746 1 Hose PVC6
95
87000068 9500-0068 1 Claw cou-
pling
6,3 mm / 1/4"
96 87002717 9500-2717 2 Hose
clamp
11-13 mm
97 87002750 9500-2750 1 Lubricator
87003189 9500-3189 1 Service kit Ref. 60, 61,
65, 66, 68,
72, 73

9866 0043 01 Subjected to alterations without prior notice. © Epiroc Drilling Tools AB. All rights reserved. 2017.12.
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Epiroc Drilling Tools AB
Box 521, SE-737 25 Fagersta, Sweden
Phone: [phone]