Epiroc Secoroc cop 54 User manual

Secoroc COP

down-the-hole hammers

COP 44, COP 54/COP 54QM, COP 64/64QM

Operator’s instructions

Spare parts lists

Any unauthorized use or copying of the contents or any part

thereof is prohibited.This applies in particular to trademarks,

model denominations, part numbers and drawings.

Epiroc DrillingTools AB, Fagersta, Sweden

Contents

Safety regulations ��3

Technical data..................................................................................... 3

General ��4

Application (drill rigs) ....................................................................... 4

Technical description......................................................................... 4

Preparing to drill ��5

Hose connection ................................................................................ 5

Setting-up the rig............................................................................... 5

Drilling ��6

Rotation to the right .......................................................................... 6

Collaring ............................................................................................. 6

Feed and rotation............................................................................... 6

Feed force........................................................................................... 6

Rotation speed ................................................................................... 7

Flushing — air blowing ..................................................................... 7

Drilling in wet holes........................................................................... 7

Water injection................................................................................... 7

Foam injection ................................................................................... 8

Tools��8

Tools for removing the drill bit and top sub from the DTH hammer........... 8

Removing the drill bit��9

Breaking the driver-chuck joint using percussion only ........... 9

Breaking the driver-chuck joint using the bit removal tool ............ 9

Dirt in the hammer��9

Other instructions�� 10

Wear of driver chuck and hammer cylinder .................................. 10

Checking the wear of the driver chuck and cylinder ..................... 10

Shimming......................................................................................... 10

Assembly of the drill bit and driver chuck ......................................11

Instruction for disassembling of disc spring unit ..........................11

Plastic footvalve in the bit shank ��12

Replacing the foot valve.................................................................. 12

Protrusion of the foot valve ............................................................ 12

Removing the foot valve ................................................................. 12

Fitting a new foot valve................................................................... 12

Regrinding the drill bit ��12

Grinding equipment ��13

Lubrication ��14

Lubricators ....................................................................................... 14

Choice of lubricating oil .................................................................. 14

Recommended lubricants ............................................................... 14

Wear limits ��15

Trouble shooting��15

Overhauling...................................................................................... 15

Spare parts list��16

Safety regulations

• Before starting, read these instructions 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 immediate hazards which WILL result in serious or

fatal injury if the warning is not observed.

DANGER

Indicates hazards or hazardous procedures which COULD result

in injury or damage to equipment if the warning is not observed.

WARNING

Indicates hazards or hazardous procedures which COULD result

in injury or damage to equipment if the warning is not observed.

CAUTION

• Read through the operator’s instructions for both the drill rig

and the DTH hammer thoroughly before putting the DTH hammer

into service. Always follow the advice given in the instructions.

• Use only authorized parts. Any damage or malfunction caused

by the use of unauthorized parts is not covered by Warranty or

Product Liability.

The following general safety rules must also be observed:

• Make sure that all warning signs on the rig remain in place and

are free from dirt and easily legible.

• Make sure there are no personnel inside the working area of the

drill rig during drilling, or when moving the rig.

• Always wear a helmet, goggles and ear protectors during drill-

ing. Also observe any local regulations.

•The exhaust air from air driven hammers and grinding machines

contains oil. It can be dangerous to inhale oil mist. Adjust the

lubricator so that the correct rate of lubrication is obtained.

• Make sure that the place of work is well ventilated.

• Always check that hoses, hose nipples and hose clamps are

properly tightened and secured, and that they are not damaged.

Hoses that come loose can cause serious injury.

• Local regulations concerning air hoses and connections

must always be strictly observed.This is especially the case if

the DTH-hammer is to be operated at pressures above 10 bar

(145psi).

• The machine must not be used for purposes other than those

prescribed by Secoroc. See “Application” on page 4.

Technical data

Dimensions and weights COP 44 COP 54 COP 64

Length without drill bit,

mm (in) 1034 (40.7) 1145 (45.1) 1308 (51.5)

Length with optional

thread, mm (in) 1169 (46.0)

Length excl. thread, mm

(in) 958 (37.7) 1069 (42.1) 1213 (47.8)

Outside diameter,mm (in) 98 (4.0) 120 (4.7) 142 (5.6)

QHD design, mm (in) 126 (4.9) 146 (5.8)

Piston diameter, mm (in) 78 (3.1) 100 (3.9) 120 (4.7)

Piston weight,

kg (lbs) 7,1 (16) 12,5 (28) 20,5 (45)

Stroke, mm (in) 115 (4.5) 115 (4.5) 115 (4.5)

Top sub thread (standard)

API Reg 23/823/83½

(Optional) API Reg 27/8

Wrench flat on top sub,

mm (in) 65 (2.6)

65 (23/8)

95 (3½) 102

(3½) QHD)

102 (4.0)

Weight without drill bit,

kg (lbs) 38 (84) 57 (126) 95 (209)

QHD design, kg (lbs) 67 (148) 109 (240)

Drilling parameters

Working pressure, bar (psi)

Rotation speed, r/min 25–80 20–70 15–60

Feed force, kN (lbs) 5–15

(1100-3300)

6–17

(1300–3700)

7–20

(1600–4400)

Feed force at 16 bar, kN

(lbs) 10 (2000) 12 (2600) 14 (3100)

Recommended bit size,

mm (in)

110-125

(4.3–4.9)

134–152

(5.3–6.0)

156–178

(6.1–7.0)

QHD design, mm (in) 140–152

(5.5–6.0)

165–178

(6.5–7.0)

Bit shank IR 340A IR 350R IR 360

Air consumption, different working pressures, l/s

Bit shank IR 340A IR 350R IR 360

10.5 bar (150 psi) 105 145 176

16 bar (230 psi) 165 243 308

20 bar (290psi) 205 285 380

25 bar (360 psi) (estimated

consump.) 255 345 480

Blowing capacity, l/s

6 bar (87 psi) 317 (670) 440 (935) 450 (955)

10.5 bar (150 psi) 495 (1050) 690 (1465) 710 (1505)

Impact rate, strokes/min

10,5 bar (150 psi) 1420 1280 1190

16 bar (230 psi) 1680 1570 1450

20 bar (290 psi) 1860 1740 1600

25 bar (360 psi) 2100 1960 1810

Penetration rate in Swedish granite, 2200 bar, 30% SiO, mm/min

(Standardized laboratory test)

Bit size, mm (in) 115 (4.5) 140 (5.5) 165 (6,5)

10,5 bar (150 psi) 310 (61) 320 (63) 290 (57)

16 bar (230 psi) 510 (101) 515 (102) 525 (104)

20 bar (290 psi) 640 (125) 640 (125) 665 (130)

25 bar (360 psi) 800 (157) 800 (157) 840 (165)

Performance ﬁgures are average values for new hammers at sea

level. Speciﬁkations and other data subject to alteration without

prior notice.

General

The down-the-hole hammer is a percussion hammer drill. As the

name implies, the hammer works down the hole at the end of the

drill string, where the impact piston strikes the drill bit directly.

Compressed air is led to the hammer via the rotation spindle and

drill pipes. Exhaust air from the hammer is discharged through

holes in the drill bit and used to ﬂush clean the drill hole. Rotation

is provided by a rotation unit on the feed beam and transmitted to

the hammer via the drill pipes.The drill pipes are threaded so that

the drill string can be extended as drilling progresses and the hole

becomes deeper. Feed force is also transmitted to the hammer via

the rotation unit and drill pipes. One of the main advantages of

DTH hammers is that the drilling rate is not affected very much by

the length or depth of the drill hole.

DTH hammers are very productive and have many applications

in the mining, quarrying, civil-engineering and water-well drilling

industries.

Application (drill rigs)

A= Drill pipe

B= Down-the-hole hammer

C= Drill bit

D= Rotation unit

E= Feed

F= Drill rig

Secoroc COP down-the-hole

hammers are designed for use

on DTH or ITH drill rigs.They

can also be used on rotary and

auger type drill rigs, provided

that such rigs meet the

speciﬁcations for DTH applica-

tions.The main demands on the

drill rig are as follows:

• It should be equipped with

a rotation unit that has a vari-

able rotation speed of 0–90 r/

min and a rotation torque of

750–3000 Nm (75–300 kpm).

Naturally, the torque demand

for a recommended rotation

speed will depend on the ham-

mer size and bit diameter.

• A variable feed force of 3–43

kN (300–4300 kp) for shallow

holes (less for deeper holes, bearing in mind the weight of the

drill string). Obviously, the feed must be strong enough to pull the

hammer and drill string out of the drill hole.This is an especially

important consideration when drilling deep holes.The weight of

the drill string varies between 9 and 34 kg/m, depending on the

pipe- and bit diameters.

Technical description

The Secoroc COP down-the-hole hammer and drill bit operate at

the bottom of the hole as a unit.

COP hammers have a long cylinder D, which houses a check valve

B, compression ring C (COP 44/54) or disc spring unit (COP 64),

impact piston F, control tube E, bit bushing G(COP 64), stop ring

Hand drill-bit shank J� The back end of the cylinder is closed by a

threaded top sub A� The top sub has a male thread for connection

to the drill pipes, and is provided with wrench ﬂats.

A driver chuck Kthreads into the front end of the cylinder.

The splined union between the driver chuck K

and bit shank Jtransmits rotation to the drill

bit.The front end of the driver chuck transmits

feed force to the drill bit.The split stop ring H

limits axial movement of the drill bit.The

check valve Bprevents water from entering

the hammer through the driver chuck when

the compressed air supply is shut off.

When feed force is applied, the drill bit is

pushed into the hammer and pressed against

the front of the driver chuck.The impact

piston strikes the shank of the drill bit directly.

The passage of compressed air through the

hammer is directed by the piston and control

tube, both of which have regulating ducts.

A built-in damping chamber cushions the

piston return stroke and increases the impact

frequency.

After the compressed air has imparted most

of its pressure energy to the piston, it is led as

exhaust air through the foot valve L into the

central gallery in the drill bit.The exhaust air

then emerges as ﬂushing air through holes in

the drill bit head.This gives efﬁcient transpor-

tation of cuttings out of the drill hole.

When the hammer is lifted off the bottom of

the hole, the piston drops into the air blowing

position.This disengages percussion and

gives air blowing only, i.e. a large volume of

air ﬂows straight through the hammer and

drill bit. During drilling, air blowing starts if

the drill bit loses contact with the bottom of

the hole.

The hammer starts operating again as soon as the bit is pressed

back against the driver chuck. Air blowing is used when powerful

ﬂushing of the drill hole is required, and in certain difﬁcult drilling

conditions.

Friction between the drill pipes and the hole wall can sometimes

reduce the penetration rate.This can often be counteracted by

increasing the air pressure to give more impact power and faster

penetration.

Together with Epiroc ODEX equipment, COP hammers are used

for simultaneous drilling-and-casing through overburden. When

used with Secoroc precision drilling equipment, COP hammers

are capable of drilling long, straight holes.

Preparing to drill

Hose connection

Connecting and securing the air hoses

For a compressed air system

to be efﬁcient, reliable and

economic, there must be:

• sufﬁcient compressed-air ca-

pacity (volume and pressure);

• minimal pressure loss be-

tween the compressor and the

hammer;

• minimal air leakage between

couplings.

This can be realized by ensur-

ing that:

• the correct size of compres-

sor is selected;

• the correct hose size is used

between the compressor and the hammer;

• there is no leakage in hose connections between the compressor

and hammer.

• Compressed-air hoses between the compressor and the

drill rig must be secured by means of an external or internal

safety wire, which must be fastened safely to the drill rig. If

the DTH hammer is to work at pressures above 10 bar (145

psi), any local regulations regarding air hoses and couplings

must be strictly observed.

• Always check that hoses, hose nipples and hose clamps

are not damaged, and that they are properly tightened and

secured.

DANGER

• Always check the condition of drill string components. Bent

or worn pipes can cause damage and excessive wear to the

hammer and rig.

CAUTION

Setting-up the rig

Before drilling with

the DTH hammer,

the rig must be

set-up correctly in

order to give

stability and safety.

If this is not done,

the effects of feed

force and rotation

torque can cause

the rig to move.This will have a negative effect on drilling,

especially when drilling deep, straight holes.

When setting up a drill wagon or crawler drill rig, a stable three-

point set-up must be obtained, with the weight of the rig distribut-

ed between the base of the feed beam and the two rear corners of

the rig. It is of the utmost importance that the rear loading points

are as far to the rear of the rig as possible, with most of the rig

weight being loaded on to the base of the feed.

When drilling in soil or other non-consolidated formations, the

weight of the rig must not be loaded on to the feed near the

mouth of the hole, since this could easily cause the hole to cave-

in. Instead, the load should be distributed some distance to either

side of the hole. Suitable support can be obtained by placing a

sturdy U-beam under the base of the feed beam, and support-

ing the beam on planks at both ends. A two inch (50 mm) plank

should then be placed inside the U-beam to prevent mechanical

chatter and damage to the base of the feed beam.

If the rig is wheel-bound, it should be raised off the ground com-

pletely using the jacks, so that all wheels are clear of the ground.

•The rig must be set-up correctly in order to give stability

and safety. If this is not done, the effects of feed force and

rotation torque can cause the rig to move or even to over-

turn.This can incur the risk of serious or fatal injury as well

as damage to the drill rig and equipment.

DANGER

• Heavy lift.Take care when

handling the hammer.The

hammer and its internal

components are heavy and

difﬁcult to handle, espe-

cially in the case of the

larger hammers.

When lifting using mechanical lifting equipment, sling the

hammer as shown in the ﬁg. Alternatively, a lifting-eye cou-

pling can be screwed on to the top sub.

•Transportation. Do not let the hammer lie unsecured on a vehi-

cle or drill rig. Always secure the hammer for transportation.

WARNING

• Always wear goggles during drilling!

•The exhaust air from the hammer (and also from the top

sub if a unit for extra ﬂushing is ﬁtted) has a very high

velocity. Objects such as small stones, drill cuttings, sand,

earth and oil residue that are entrained in the ﬂushing air

can cause serious injury to unprotected eyes. Pay special

attention to this danger during collaring, when a top sub with

extra ﬂushing is in use, an when the hammer is fed through

the drill steel support or down into the hole.

WARNING

Drilling

Rotation to the right

DTH hammers must be rotated to the

RIGHT (clock wise) during drilling, since the

driver chuck and top sub are threaded into

the cylinder with RIGHT-HANDTHREADS.

Rotation must always be to the right when

the hammer is operating. Left-hand rotation

(or no rotation) will cause the driver chuck

to loosen, which could mean losing the drill

bit (or even the entire hammer) down the

hole.

The drill string should be rotated to the

right even when the hammer is not operat-

ing. For example, this should be done when cleaning the drill hole

and when lifting up the drill string. It can be said that rotation to

the right should be switched on as long as other operations are

in progress with the hammer in the hole.The risk of the drill bit

working loose should also be considered when breaking the joints

between drill pipes. When adjusting the breaking wrenches, bear

in mind that the drill string must not be rotated anti-clockwise any

more than is absolutely necessary.

• Always switch on rotation to the right before starting the

feed or hammer.

• Let the hammer rotate to the right (clockwise) even during

lifting or lowering of the hammer.

• Do not switch off rotation to the right until all other func-

tions have been switched off.

IMPORTANT

•Take great care when jointing drill pipes. Make sure there

is no danger of your ﬁngers being pinched or clothing being

entangled when the drill string is rotated.

• When a pipe wrench is used during jointing, there is a risk

of the wrench ﬂying off and causing injury when rotation is

applied.

WARNING

• When drilling on soft or unstable ground, great care must

be taken because the ﬂushing air from the hammer can

erode the material around the drill hole, and so undermine

the ground beneath the drill rig.This can pose a great danger

to personnel and risk damaging the equipment.

DANGER

• Always wear ear protectors during drilling.

CAUTION

Collaring

• Feed the hammer downward until the drill bit is about 5 cm from

the collaring point.

• Start rotation to the right at low speed (creeping).

• Feed the hammer on to the rock using minimal feed force, so that

the bit is pressed into the hammer, and into the impact position.

• Start collaring the hole with reduced impact and feed, until the

bit has entered the rock.

• Open the impact mechanism control fully and adjust the rotation

and feed so that the hammer drills smoothly and steadily.

5 cm

Feed and rotation

With holes of relatively shallow depth, the setting of feed and

rotation is usually a simple matter in DTH drilling, since the

hammers are comparatively insensitive to small variations in the

“normal” ﬂow and pressure settings.The settings can be regarded

as correct when the drill string turns evenly without jerks or jam-

ming, and a steady penetration rate is obtained.

Feed force

When drilling with COP DTH-hammers, the feed force should be

high enough to keep the shank of the drill bit pressed into the

hammer during drilling.

•Too low a feed force will give easy rotation, excessive vibration

and reduced penetration.The resultant reﬂex shock waves can

damage the rotation unit and feed beam.

•Too high a feed force causes the rotation to jam (either erratically

or completely) and can subject the drill string to severe bending

stresses. It can also damage the rotation unit and feed beam.

The feed force often needs to be corrected during drilling, de-

pending on the rock formation and the weight of the drill string,

which obviously varies with the hole depth.

A rough guide to drill pipe weights for different sizes of DTH-ham-

mer are given in the table below:

Feed force – recommendations

COP 44 COP 54 COP 64

Feed force 5–15 kN 6–17 kN 7–20 kN

Feed force at 16 bar 10 kN 12 kN 14 kN

Pipe dimension, mm Approx� weight, kg/m

76 9

89 15

102 18

114 20

127 23

140 34

Bit diameter, rock formation, hole depth and available rotation

torque will have a considerable inﬂuence on the setting of the

feed force. What is important is that the feed force is adjusted to

give steady penetration and a constant, even rotation speed with

no jamming (see table).

N�B.It is important that the feed force be adapted to suit the

weight of the drill string. When drilling deep holes, this requires

control facilities for “negative feeding”, a so-called “holdback”

function.

Rotation speed

In hard rock the rotation speed for COP hammers should be set

between 20-90 r/min, depending on the hammer size and bit

diameter (the larger the bit diameter, the slower the speed).The

upper limit generally produces the best penetration rate. In very

abrasive rock formations, however, the rotation speed should be

reduced to avoid excessive wear of the drill bit. When drilling in

softer rock or with high air pressure (above 18 bar) in non-abra-

sive formations, higher rotation speed may be used.The following

should be noted:

Too high a rotation speed will cause increased wear to the drill bit,

hammer and drill pipes. Stresses to the feed and rotation unit will

also increase.

Too low a rotation speed results in a poor drilling output and

uneven operation.

Rotation speed, r/min COP 44

Ø 115 mm

COP 54

Ø 140 mm

COP 64

Ø 165 mm

Recommendations 40 – 80 35 – 70 30 – 60

Flushing — air-blowing

To avoid wasteful re-crushing and the risk of jamming, drill cut-

tings must be ﬂushed out of the drill hole at the same rate as new

cuttings are produced. It is good drilling practice to clean out the

hole at regular intervals by means of air-blowing.This is especially

important in non-consolidated formations and when there is a

danger of the hole wall collapsing. Air-blowing is done by lifting

the hammer off the bottom of the hole (ﬁg. a) and running the

feed back and forth.

N�B� Rotation must always be to the right.The impact mechanism

stops as soon as the hammer is lifted and the bit drops down-

wards, which causes a considerable volume of air to ﬂow through

the hammer and ﬂush-out the hole. When the hammer is lowered

back on to the bottom of the hole, the bit is pressed back into the

impact position, which re-starts the impact mechanism (ﬁg. b).

N�B� The hammer can ﬂush more air than the compressor can

deliver.This means that the air supply from the compressor

should be restricted (by means of the impact-control valve) if the

air-blowing sequence is activated longer than 3–5 seconds.

• Always wear goggles during drilling.The backward-di-

rected ﬂushing air from the top sub contains drill cuttings

and oil residue which can injure the eyes.

WARNING

Drilling in wet holes

The inﬂow of water into the drill hole is expected when drilling

water wells, but can also occur when drilling deep holes for other

purposes. Water inﬂow does not normally create problems for

drilling, although both “too little” and “too much” can be trouble-

some.

Too little water tends to bind the drill cuttings into a paste, which

sticks to the drill pipes or the hole wall and can easily form collars

or plugs.The problem can be lessened by adding water to the

ﬂushing air, thus increasing the ﬂuidity of the cuttings. Fluidity

can be further improved by adding washing detergent to the

water.

N�B� Remember to increase the lubrication dosage when injecting

water into the ﬂushing air!

Water injection

Water injection is normally used to suppress dust when drilling

dry holes. COP down-the-hole hammers are designed to function

with a certain amount of water injection. As an example, only 2—6

litres of water per minute (at 18 bar air pressure), injected into the

main air line, is sufﬁcient to control the dust when drilling with

the COP 64.Too much water injection will have a very negative

inﬂuence on the penetration rate of the hammer.

Rule of thumb: 0,25 l water per m3compressed air consumed by

the hammer during the drilling sequence�

Flow chart for water ﬂushing

A = Main inlet valve on drill rig K = Water tank

B = Container for air tool oil N = Compressor

C = Filter O = DTH-hammer

D = Lubricator valve

E = Pressure gauge Optional

F = Check valve L = Separate foam pump

G = Valves M = Separate foam tank

The injection point for water and foaming concentrate should

always be located after the main shut-off valve on the rig.

If not, there is a danger of the mixture being pumped back

through the main air line and into the compressor.This could

seriously damage the compressor.

CAUTION

Foam injection

Foam can be used in DTH drilling to improve the ﬂushing perfor-

mance (especially in non-consolidated formations). It does this by

“lifting up” the cuttings out of the hole, and also has the desirable

effect of sealing the hole walls. Foaming concentrate is pumped

into the compressed-air line in the form of a concentrate/water

mixture. Epiroc foaming concentrate has lubricating properties

and contains corrosion inhibitors, which prevent seizing in the

hammer.

N�B� Before using foaming concentrates not supplied by Epiroc,

please consult your Epiroc representative for advice.

With Epiroc foaming concentrate, a mixture of 0,5–2 percent

concentrate/water is normally recommended. When drilling in

water-bearing rock and other difﬁcult formations, it might be nec-

essary to increase the percentage of concentrate, and also to add

polymers to the operating air.This will help to stabilize the hole

walls and increase the lifting capacity of the foam.The concen-

trate/water mixture is injected into the main air line by means of a

high-pressure pump.

Minimum requirements for the water-injection pump are as

follows:

• min. pressure = 30 bar

• min. ﬂow = 20 l/min.

After drilling with foam, it is recommended that residual foam

should be ﬂushed out of the hammer to prevent corrosion.This is

done by injecting water only into the air, and so ﬂushing the foam

out the hammer. Oil should then be poured into the drillstring and

the hammer operated for a few minutes before the drill string is

withdrawn from the hole. If the hammer is then to be stored for a

long time, it should be dismantled and all parts cleaned and oiled

thoroughly.

Tools

Tools for removing the drill bit and top sub

from the DTH hammer

The threaded connections of the driver-chuck and top sub can be-

come very tightly tensioned during drilling.There are special tools

for removing the bit and top sub from the cylinder of the DTH

hammer, and these should be used whenever possible.

Wrench for pipe-jointing and top sub

Wrench flat, mm Ordering No�

55 8484-0211-43

65 8484-0211-00

95 8484-0211-02

102 8484-0214-13

120 8484-0211-36

140 8484-0211-44

Bit removal tool

Loosening the threads of the hammer

If special tools like chain wrenches or other types of wrench are

used to break the hammer joints, then the tool must be attached

around the hammer cylinder as shown in the ﬁgure. Do not attach

at other points!

mm (in)

COP 44 90 (3.5) 70 (2.8) 70 (2.8) 55 (2.2)

COP 54 130 (8.5) 70 (2.8) 70 (2.8) 75 (2.9)

COP 64 140 (5.5) 70 (2.8) 70 (2.8) 110 (4.3)

•Take great care when breaking the driver-chuck joint using

the bit removal tool in combination with reverse rotation. If

the shaft of the tool is not locked or touching the edge of the

feed beam, the shaft can turn with great force when breaking

the driver chuck joint.

• Keep your hands and clothing well clear of the hammer/drill

string when it is rotated. Entanglement can result in serious

injury.

• Blows against hammer or bit can cause fragments of metal

to ﬂy. Always wear goggles when breaking joints.

DANGER

Breakout bench

It is always most convenient to break the hammer threads on the

rig. For circumstances, when the threads cannot be broken or

tend to get stuck, there is a breakout bench available.

N�B.Failure to attach the wrench as illustrated (B, C) may result

in damage to the cylinder. Any such damage will not qualify for

compensation.

Removing the drill bit

The drill bit can be removed in a number of different ways,

depending on the tools available.The following two methods are

commonly used:

A� Breaking the driver-chuck joint using percussion only

Run the hammer into the rock or a thick plank.

• Apply light feed force.

• Carefully start the impact mechanism of the

hammer.

• Stop the impact mechanism as soon as the driv-

er-chuck joint “cracks”.

• Run the hammer up the feed beam to a suitable

working height, and unthread the driver chuck and

drill bit.

N.B. Beware of the weight of the drill bit. It could

be too heavy to hold.

B� Breaking the driver-chuck joint using the bit

removal tool

If the driver-chuck joint is very tight, the special

bit-removal tool should be used to break the joint.

Important: Never use a sledge-hammer on down-

the-hole hammers.

• Place the bit-removal tool in the drill steel support.

N�B� Looking from behind the feed beam, make sure

that the shaft of the bit-removal tool is touching the

left-hand edge of the feed beam.

• Carefully run the bit down into the bit removal tool.

• Slowly start up the impact mechanism of the

hammer.

• Stop the impact mechanism as soon as the

driver-chuck joint “cracks”.

• Unscrew the driver chuck by rotating the COP hammer to the

LEFT (anti-clockwise).

Dirt in the hammer

Stoppages and breakdowns caused by dirt in the percussion

mechanism are practically inevitable with all rock drills, and DTH

hammers are no exception. However, it should be remembered

that, while DTH hammers are no more sensitive to dirt than

tophammers, there is obviously a greater risk of dirt ingress in

down-the-hole drilling, especially during pipe jointing. Any dirt

that enters the drill pipes goes straight into the percussion mech-

anism.To ensure reliable operation of the hammer, every effort

should therefore be made to prevent dirt from entering the drill

pipes.The following rules should be observed:

• Always keep drill pipes clean. Always store or stack drill pipes

in such a way that the risk of dirt ingress is minimized. Do not let

the thread ends rest on grit or mud. Use thread covers wherever

practicable.

• Always keep the open thread end of the drill pipe covered during

jointing, and remove the cover just before the pipe is coupled up.

• Before coupling up, check that the drill pipe is clean around the

threads and on the inside. If in doubt, blow clean the pipe.

Remember to cover the pipe end that is already in the hole.

• If threads are dirty, they should be cleaned using a strong bristle

brush or a cloth.

N.B. Always clean away from the hole in the pipe. Do NOT let

grit fall into the hole in the pipe. After cleaning, always coat the

threads with Epiroc thread grease before jointing.

•Take extra care during jointing operations when drilling in abra-

sive rock formations, since the ingress of quartz particles into the

hammer will cause heavy wear.

• When drilling holes in water-bearing rock, never leave the ham-

mer at the hole bottom with the air supply switched off. If drilling

is to be suspended temporarily, always pull up the hammer by at

least two pipe lengths.

• Clean around the driver chuck before changing the drill bit. Make

sure the shank of the new drill bit is clean.

• Keep the hammer clean and plug both ends when not in use.

Change worn or damaged parts in good time.

All Secoroc COP down-the-hole hammers

contain a check valve that is designed to trap

a quantity of air inside the hammer when the

air supply is switched off. In most conditions,

this prevents the ingress of water and dirt into

the hammer during jointing operations.The

check valve A and O-ring B must be fault-free

when drilling in water-bearing formations.

When drilling deep holes in rock with a high

water inﬂow, however, it is possible that

some seepage of water into the front of the hammer will take

place during jointing. Since only very small particles of dirt would

be able to penetrate the hammer in this way, the threat to the

hammer is not serious.

The sealing efﬁciency of the check valve

can be checked by pouring a small

quantity of lubricant through the top

sub of the hammer, with the hammer

held vertical. If the lubricant passes

through the checkvalve, then the valve

spring and/or valve seal is worn or

damaged and should be replaced

immediately.

•Take great care when jointing the drill pipes and handling

the drill bit.

• Mind your ﬁngers!

• Keep your clothing, hair etc. well clear of rotating compo-

nents! Carelessness can result in serious injury.

WARNING

Other instructions

Wear to the driver chuck and hammer

cylinder

Since the driver chuck and hammer

cylinder are “sand-blasted” continuously

by large volumes of abrasive cuttings

during drilling, they eventually become

worn out.The areas adjacent to the

cuttings grooves in the drill bit will be

subjected to the most wear.To prevent

uneven wear of the hammer cylinder,

therefore, the driver chuck and bit should

be marked as shown in ﬁgure, before the

chuck is lifted off the bit.

When ﬁtting the driver chuck back on to

the drill bit after grinding or replacing a

drill bit, its radial location on the bit

shank should be advanced by one spline

section.This will give a more even

distribution of wear on the driver chuck

and hammer cylinder.

If the driver chuck is exposed to exceptionnally heavy wear, e.g.

when drilling in rock formations with a high quartz content (gran-

ite, quartzite etc.), it may be necessary to turn the driver chuck by

more than one spline section in order to prevent the driver chuck

and hammer cylinder from wearing out too quickly. As a rule, the

cuttings grooves in the bit should always be pointing towards the

part of the driver chuck that is least worn.

Since the hammer cylinder has three thread inlets, the part of the

driver chuck that is worn the most can be located against the part

of the hammer that is worn the least.

Checking the wear of the driver chuck and

hammer cylinder

Wear to the driver chuck and hammer cylinder should be checked

regularly, e.g. every time the bit is reground or changed. Meas-

ure the diameter of the hammer cylinder using a sliding calliper.

Measure along the full length of the cylinder, with the exception

of the outermost 100 mm at each end. At any point between these

points, the diameter of the hammer cylinder must not be less than

the minimum permissible diameter given for the respective DTH

hammer sizes in the table below.

Minimum permissible diameter

COP 44 89 mm

COP 54 111 mm

COP 64 132 mm

The outside diameter of the driver chuck must not be less than

that of the hammer cylinder.

N�B� When the hammer cylinder has to be changed, the driver

chuck must be replaced at the same time (see the section “Wear

limits”).

The hammer should be overhauled at suitable intervals, depend-

ing on the operating conditions.The abrasiveness of the rock will

affect the overhauling intervals, since it has a strong bearing on

the rate of wear.

Shimming

Checking the clearance

between the top sub and the

cylinder

N�B� Not applicable on COP 54GE,

COP 64

When ﬁtting the top sub to the hammer, the clearance between

the top sub and the cylinder must be checked with a feeler gauge.

This is done as follows:

• Remove the valve body D and compression ring B from the

cylinder.

• Remove the control tube G and buffer housing H from the cylin-

der, using a rod.

• Remove the outer buffer K from the control tube, (the inner

buffer J should not be removed).

• Smear the O-ring on buffer housing H and the inner buffer J with

silicone grease. Oil all other surfaces of the control tube G with oil.

• Fit the buffer housing H and control tube G back into cylinder.

Clearance before/after shimming

Ordering No�

shims (1–4)

Min�

clearance

Clearance after

shimning

COP 44 3161-1422-00 1,5 mm 1,9–2,5 mm

COP 54 3161-1522-00 1,8 mm 2,2–3,0 mm

• Fit the buffer housing H and control tube G back into cylinder.

• Fit the compression ring B and valve body D back into the cylinder.

• Remove the O-ring E from the top sub F.

•Thread the top sub into the cylinder and tighten it by hand.

• Measure the clearance between the top sub and cylinder.

If the clearance is less than the minimum value given in the table,

shimming must be carried out.

H K

Fit the necessary number of shims C (1 – 4 pcs) between the

compression ring B and valve body D.

If, after the maximum number of shims (4 pcs) has been inserted,

the minimum clearance is still less than the value shown in the

table, then the compression ring or circlip is worn out and must

be replaced.

• After inspection and eventual shimming, smear the outer rubber

buffer K with silicone grease and ﬁt it back into the cylinder to-

gether with the control tube G and buffer housing H.

•Then ﬁt all other parts back into cylinder.

N�B� Do not forget O-ring E — ﬁrst smear it with silicone grease

and then ﬁt it back on to the top sub.

• Finally, smear the threads of the top sub with Epiroc thread

grease, and thread it into the cylinder.Tighten hard with the aid of

a wrench.There should now be hardly any clearance between the

top sub and cylinder.

Buffer rings (J, K) for COP 64

JKThe buffer rings must

be mounted with their

concave (curved)

surfaces towards the

control tube ﬂange.

Incorrectly ﬁtted buffer

rings can cause

serious damage to the

hammer.

IMPORTANT!

Assembly of the drill bit and driver chuck

• Smear the splines of the bit shank with Epiroc thread

grease.

• Smear the O-ring of the stop ring with silicone grease.

• Assemble the bit 1, driver chuck 2 and stop ring 3 as shown in

ﬁgure.

Make sure the stop ring is located

correctly, and that it faces the

right direction. Incorrect ﬁtting

will result in severe damage to

the hammer.

IMPORTANT

• Smear the thread on the driver chuck with Epiroc thread grease.

• Screw in the bit assembly by hand. Note that there should be a

clearance of 0,1–0,4 mm between the driver chuck and the cylin-

der casing. If there is no clearance, the end surface of the cylinder

casing should be ground down as necessary.Tighten the driver

chuck with the aid of the bit spanner.

Instruction for disassembling of disc spring

unit

N�B�There is normally NO NEED for disassembling of the disc

spring unit. If you have to – follow this instruction carefully.

• Never disassemble the spring unit if the friction springs

may be preloaded.

DANGER

• Remove topsub from hammer.

•Take out disc spring unit (picture 1).

• At this time act very carefully, and do NOT touch the friction

springs, since they may be preloaded.

• Hit the springs with a hammer to separate the rings (picture 2).

1 2

• Hold the check valve body in an upright position and unscrew

the spring stop 2-3 turns (picture 3).

• Use a screwdriver to ensure the rings are separated (picture 4).

• At this time it is very important to check that all rings are sepa-

rated from each other.

• Unscrew the spring stop.

Plastic foot valve in

the bit shank

Replacing the foot valve

When the footvalve becomes worn or damaged, it must be

replaced. If this is not done, the performance of the hammer will

be seriously affected.The signs of wear or damage to the foot

valve include excessive air consumption, uneven percussion and

difﬁculty in starting the hammer.

Wear limits and protrusion – foot valves

Diam�

new

Diam�

worn out

Foot valve

ordering No�

Effective

protrusion A

COP 44 27 mm 26,8 mm 9227 45 ± 1 mm

COP 54 35 mm 34,8 mm 9164 55 ± 1 mm

COP 64 38 mm 37,7 mm 9235 57 ± 1 mm

Protrusion of the foot valve

After ﬁtting the foot valve into the bit shank,

its protrusion from the end of the shank

must be checked.Too much or too little

protrusion will seriously affect the perfor-

mance of the hammer.

After the foot valve has been pressed into

its seat and protrusion is within the speci-

ﬁed limits (see table), do not put more pressure on the foot valve,

since this could result in damage.

Removing the foot valve

The worn or damaged foot valve is removed by cutting it with a

hacksaw blade or knife, and then prising it out of the bit shank

with the aid of a screwdriver. Heating the foot valve to 50—70° C

can make removal easier.

• When removing and ﬁtting foot valves, always wear protec-

tive goggles, gloves and appropriate protective clothing. Care-

lessness can result in injury to the eyes or other body parts.

• Foot valves are brittle. Heavy blows can deform or dislocate

the foot valve, with the risk that it would then obstruct the

movement of the impact piston.

WARNING

Fitting a new foot valve

The new foot valve should be pressed into the seat in the ﬂushing

hole in the bit shank using a special assembly tool that guaran-

tees guidance of the foot valve into the seat, and ensures that

the amount of protrusion is correct. For easier installation, the

temperature of the plastic foot valve should be 20 — 60° C (it can

be heated in water, or on the compressor). Before ﬁtting the foot

valve into the bit shank, coat the part of the valve that is pressed

into the drill bit with rubber glue (or a similar substance).The

rubber glue will act as a lubricant during ﬁtting, and as a ﬁxative

thereafter. If rubber glue is not available, use silicone grease or

some other similar lubricant.

N�B� Do NOT use a hammer to seat the foot valve. Heavy blows can

damage the foot valve or cause it to locate incorrectly so that it is

struck by the impact piston during drilling. Use some kind of hydrau-

lic press to press it gently but ﬁrmly on to its seat in the bit shank.

Assembly tool Ordering No�

COP 44 9226

COP 54 9163

COP 64 9182

• Before grinding, always check the ﬂushing holes of the drill

bit for traces of explosive. Contact with the grinding wheel

can cause the explosive to explode causing serious or fatal

injury as well as damage to the equipment.

To clean the ﬂushing hole, use only a wooden rod, copper

wire or ﬂushing water.

DANGER

• Always wear ear protectors, protective clothing, gloves and

goggles when grinding.

• Use a dust extraction system or an approved dust mask.

This is of special importance when dry grinding indoors.

CAUTION

Regrinding the drill

bit

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 pene-

tration rates and risk damaging the drill bit through overdrilling. 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

damaged (fractured buttons

should be ground ﬂat). It is

both practical and economical

to redress the buttons when

the wear ﬂat reaches about ½ of the diameter of the button.

Note: This is a general recommendation.

Look out for “snake skin”

If microscopic fatigue cracks –

so-called “snake skin” – begin to

appear on the cemented carbide

buttons, they must be ground away.

In any event, bits should be re-

ground after 300 metres of drilling at

the most.This should be done even

if there are no visible signs of wear and the penetration rate

continues to be good. If snakeskin 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

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.

2 mm

Min

0,5

Grinding equipment

The Grind Matic HG is a portable,

hand-held, air-powered grinding

machine for button bits, ideal for use at

the worksite. It is used with dia-

mond-impregnated grinding cups,

which can be used with or without

water ﬂushing.

The Grind Matic Manual B-DTH is a

mechanized air-powered grinding

machine for button bits. It is mounted

in a steel box-barrow, which can be

wheeled easily around the worksite.

The Grind Matic Manual B-DTH uses

diamond-impregnated grinding wheels.

For “permanent” grinding stations, a

mechanized stationary grinding

machine is available, the Grind Matic

BQ3-DTH. It is equipped with automat-

ic feeding devices and grinds both the

cemented-carbide buttons and the

bit-body steel in one operation.The

machine uses diamond-impregnated

grinding wheels.

Further information about grinding equipment can be found in the

respective product leaﬂets.

Always use water ﬂushing with grinding wheels.

• Use water if possible also with grinding cups and

hand-held grinders.

IMPORTANT

Care & maintenance

The service life and performance of DTH hammers depends to a

large extent on good operating practice and regular maintenance.

The following recommendations should be observed:

• Make sure that the compressed air is always clean and dry.

• Always blow clean the air hoses before connecting them to the rig.

• Make sure that the drill pipes are stored properly in the pipe

rack, or stacked on trestles in such a way that dirt cannot enter the

pipes.

• Fit thread guards to the ends of the drill pipes whenever practi-

cable. Keep the threads and the insides of the pipes clean.

• Always cover the “open” thread end of the drill pipe during

pipe-jointing operations.The ingress of dirt into the drill string will

cause blockages and/or seizure in the hammer, which can result in

breakdown.

• Check regularly that the dosage of lubricating oil into the oper-

ating air is sufﬁcient. Check that the lubricating-oil tank on the rig

is ﬁlled with oil of the correct type and quality. See “Recommend-

ed lubricants”, page 15.

• Check the wear on the driver chuck and hammer cylinder regu-

larly.The diameter of the driver chuck must never be less than that

of the hammer cylinder.The service life of the hammer cylinder

can be prolonged by always ﬁtting a driver chuck with a greater

outside diameter than that of the hammer cylinder. When the

components are approaching their minimum permissible diam-

eters, frequent inspection is necessary. Alternatively, change the

components in good time – it makes good economic sense.

N�B� When the hammer cylinder is replaced, the driver chuck

should be replaced at the same time (see “Wear limits”, page 10).

A general overhaul of the hammer should be carried out at suita-

ble intervals, depending on the operating conditions and empiri-

cal statistics.The abrasiveness of the rock will have a considerable

effect on the rate of wear, and will affect the overhauling intervals

accordingly.

Lubrication

Lubricating oil is vital for the satisfactory

operation of DTH hammers. Apart from

regular checking of the oil level in the

lubricating-oil tank, always make sure that

there is oil in the compressed air.This can

be checked whenever the rotation unit is

free, i.e. disconnected from the drill string.

Simply place a plank over the drill-steel

support and blow operating air on to the

plank. After a few moments, the surface of

the plank should become oily, which con-

ﬁrms that lubricant is being carried to the

hammer in the operating air.

The importance of adequate lubrication of the hammer cannot

be over-emphasized. Poor lubrication will accelerate wear and

ultimately result in breakdown.The effective lubrication of the

DTH hammer is not always a straight-forward matter, owing to

wide variations in operating conditions, e.g. extreme temperature

differentials between the hammer and the lub-ricator, water or

foaming concentrate added to the operating air, etc.

Different lubricants have different properties. Mineral oils have

the best lubricating properties and are preferable in most cases.

Mineral-base oils have good adhesion properties and are pro-

duced in different viscosity and temperature- range grades.

Since mineral oils have good resistance to water, they are suitable

for use even when comparatively large volumes of water are

injected into the operating air. In this case, however, the dosage

must be increased.

Glycol-based lubricants, such as Epiroc Air Oil, are water soluble,

and must not be mixed with mineral oils.They are used primarily

to prevent freezing, and should be used only when there is a min-

imal water content in the operating air. Glycol-based lubricants

are used extensively in water-well drilling for reasons of water

hygiene. If there is a lot of condensation in the drill string, which

is often the case in long drill strings, then lubrication may become

unsatisfactory because dilution seriously affects the function of

glycol-base lubricants.

Other lubricants worth mentioning are the so-called “edible”

oils, which consist of vegetable oils, synthetic lubricants of the

ester type, or a mixture between these two. Edible oils can be

mixed with mineral oils, have good lubricating properties and are

non-toxic.

Lubricators

Both plunger-pump and nozzle-type lubrication systems are

available.

The plunger pump is relatively insensitive to the viscosity of the

lubricant and gives a more reliable dosage compared with the

nozzle-type lubricator.This is of major importance when the ambi-

ent temperature is low.

About 1 ml of oil per m3of operating air consumed should be the

minimum dosage for bench drilling. As a rule, higher dosages are

needed in water-well drilling.

Normal lubrication dosage

COP 44 0,3–0,5 l/hr

COP 54 0,4–0,6 l/hr

COP 64 0,5–0,8 l/hr

In case of water injection, increase dosage by 0,1–0,2 l/hr.

N�B�The distribution of lubricating oil through the compressed air

system generally takes place in the form of so-called “wall ﬂow”.

If the air system has been shut off for a long period of time, it can

take quite some time for the lubricant to reach the hammer. In

such cases, a small amount of oil must be poured directly into the

hammer or air hose before drilling.

Choice of lubricating oil

For COP down-the-hole hammers it is recommended to use Epi-

roc COP oil. When choosing between other types of lubricants, the

oil should have:

• Suitable viscosity

Ambient temp�°C(°F) Viscosity grade

–20 to +15 (-4 to +59 ISO VG 46-100

+15 to 35 (59 to 95) ISO VG 100-150

> +35 (95) ISO VG 150-220

• Good adhesion properties

• High ﬁlm strength

• Corrosion inhibitors

• EP additives

For reasons of water hygiene, lubricating oils used in water-well

drilling should be non-toxic.

The temperature limits given above refer to the temperature

of the oil in the tank, i.e. the ambient temperature. In cases

where the hammer is powered by warm compressed air at high

operating pressures, e.g. when connected to a nearby portable

compressor, the temperature of the operating air must be taken

into consideration. In such cases it may be necessary to choose a

thicker oil than what is recommended in the table.

Recommended lubricants

Lubricating oil tank Epiroc COP oil

Threads and splines Epiroc thread grease

O-rings and rubber parts Silicone grease (temperature limits

-20 to +120°C)

Ordering No� Epiroc COP oil:

Can 10 litres 3115 3125 00

Can pallet 48 x 10 litres 3115 3126 00

Drum 208 litres 3115 3127 00

Wear limits

Component Wear limit Action Comments

Drill bit (diameter). Min. 6–10 mm (COP 34 4–7

mm) greater than the max.

diam. of the cylinder.

Fit new bit. Min. measurement at lower working pressures.

Max. measurement at higher working pressure.

Driver chuck (diameter). Never less than the diameter

of the cylinder.

Replace. Failure to replace in good time will cause severe

wear to hammer cylinder.

Cylinder (diameter). COP 44 – min. 89 mm

COP 54/54Qm – min. 111 mm

COP 64/64qm – min. 132 mm

Replace. Measure the diameter along the full length of the

cylinder, with the exception of the outermost 100

mm at each end. Risk of fracture.

Bit bushing (inside diameter). COP 64 max. 87,6 mm Replace. Measure the bit bushing at its waist.

Piston / Cylinder. Diametric clearance:

max. 0,20 mm

Replace worn

parts.

Outside diameter of piston should be measured at

the sealing surface of the piston.

Piston / Control tube. Diametric clearance:

max. 0,20 mm

Replace worn

parts.

Inside diam. of the piston against outside diam. of

the control tube.

Check valve. Valve seat worn or damaged. Replace worn or

damaged parts.

Tightness of check valve can be tested by pouring a

small amount of oil into the valve with the hammer

in vertical position.

Sleeve (flushing valve). Worn or damaged. Replace.

Buffer. Worn or damaged. Replace.

Trouble shooting

Fault Cause Remedy

Impact mechanism does

not operate, or works with

reduced effect.

Air supply throttled or blocked. Check the air pressure. Check that all air passages leading to

the hammer are open.

Oil is not reaching the impact mechanism

of the hammer. Poor or no lubrication,

causing increased wear, scoring or seizure.

Let operating air blow through rotation spindle on dry

plank or similar. After a few moments, plank surface should

become oily. Inspect lubricator. Top-up with oil if necessary

or increase lube oil dosage.

Too large clearance (wear) between the

piston and cylinder, or between piston and

control tube.

Disassemble the hammer and inspect the wear (see ”Wear

limits”). Replace worn parts.

Hammer clogged with dirt. Disassemble the hammer and wash all components.

Compression ring worn or damaged. Check clearance between top sub and cylinder. (See

”Checking the clearance between the top sub and cylinder”,

page 10) Replace worn or damaged compression ring.

Worn buffer rings in the cover. Disassemble the hammer and replace the buffer rings.

O-rings in bit bushing (COP 64) are worn or

damaged.

Disassemble the hammer and replace the O-rings.

Dirt enters the hammer when drilling in

water-bearing formation.

Make sure the check valve seals against the seat in the top

sub (see ”Dirt in hammer”, page 9). Remove the top sub and

replace check valve.

Lost drill bit and chuck Impact mechanism has been operated

without rotation to the right.

Fish out the lost equipment using a fishing tool. Remember

to always use right-hand rotation, both when drilling and

when lifting the drill string.

Excessive air

consumption

Flushing valve parts damaged.

Foot valve worn or damaged.

Disassemble and replace damaged parts, see page 7.

Replace foot valve, see page 12.

Overhauling

DTH hammers should be overhauled at suitable intervals depending on the drilling conditions and empirical service records. Since the

abrasiveness of the rock has a considerable bearing on the rate of wear, it will affect the overhauling intervals accordingly. Before the DTH

hammer is sent to an authorized Epiroc service workshop for overhauling, the joints at the top sub and driver chuck should be ”cracked” on

the rig.

Secoroc COP 44

Down-the-hole hammer

Hammers and Kits Prod. No. Product code

COP 44 complete,

2 3/8” API Reg Pin

89000482 9704-CO-00-10P-34-000

COP 44 complete,

2 7/8” API Reg Pin

89001236 9704-CO-00-12P-34-000

O-ring kit incl. item 5x3, 1x11, 1x18 89000708 9704-CO-00-000-00-000-K47

Economy kit, 2 3/8” API Reg Pin (incl. item 2, 5x3,

5, 7, 2x9, 12, 13, 18, 19 )

89000736 9704-CO-00-10P-34-000-K40

Economy kit, 2 7/8” API Reg Pin (incl. item 2, 5x3,

5, 7, 2x9, 12, 13, 18, 19 )

89001317 9704-CO-00-12P-34-000-K40

Ref. Part Prod. No. Product code

1 Exhaust tube 86002883 9227

2 Chuck 89000053 9704-CO-00-000-34-000-001

3 O-ring* for Bit retaining ring

4 Bit retaining ring assembly incl. O-ring 89000010 9704-CO-00-000-34-000-A02

5 Casing 89000051 9704-CO-00-000-00-000-004

6 Piston 89000085 9704-CO-00-000-34-000-005

7 Lock ring 89000052 9704-CO-00-000-00-000-006

8 Control tube 89000045 9704-CO-00-000-00-000-007

9 Buer ring, 2 pcs required 89000047 9704-CO-00-000-00-000-009

10 Cover assembly incl. O-ring 89000046 9704-CO-00-000-00-000-021

11 O-ring* for Cover

12 Compression ring 89000025 9704-CO-00-000-00-000-014

Shim for Compression ring 89000087 3161-1422-00

13 Valve body 89000026 9704-CO-00-000-00-000-015

14 Spring for Check valve 89001019 9704-CO-00-000-00-000-016

15 Check valve 89001020 9704-CO-00-000-00-000-017

16 Seal for Check valve 89001021 9704-CO-00-000-00-000-018

17 O-ring* for Backhead

18 Backhead assembly, 2 3/8” API Reg

Pin, incl. O-ring

89000451 9704-CO-00-10P-00-000-A20

18 Backhead assembly, 2 7/8” API Reg

Pin, incl. O-ring

89001237 9704-CG-00-12P-00-000-A20

17 18

13 14 15 16

910 11

1 2 3 4

*O-rings not sold separately. Included in dierent kits - see table.

9866 0134 01 2018-04.

Wear limits

Casing Min. OD 89 mm

Piston / Casing clearance Max. 0,2 mm

Piston / Control tube clearance Max. 0,2 mm

Exhaust tube Min. OD 26,8 mm

Exhaust tube protrusion 45 +/– 1 mm

Epiroc Drilling Tools AB

Box 521, SE-737 25 Fagersta, Sweden

Phone +46 223 461 00

epiroc.com

Secoroc COP 54

Down-the-hole hammer

Hammers and Kits Prod. No. Product code

COP 54 complete, 2 3/8” API Reg Pin 89000477 9705-CO-00-10P-37-000

COP 54 HD complete, 2 3/8” API Reg Pin 89000868 9705-CO-00-10P-37-H00

COP 54 complete, 2 7/8” API Reg Pin 89001228 9705-CO-00-12P-37-000

COP 54 complete, 3 1/2” API Reg Pin 89000481 9705-CO-00-14P-37-000

COP 54 QM complete, 3 1/2” API Reg Pin 89000565 9705-CO-00-14P-37-HB0

O-ring kit incl. item 5x3, 1x11, 1x19 89000710 9705-CO-00-000-00-000-K47

Economy kit, 2 3/8” API Reg Pin