Roller Bohrstander S2, Instruction Manual

25

To achieve better stability when drilling with ROLLER’S Bohrständer T and 

ROLLER’S Centro SR, the spacer set (38) can be mounted. For this, the 

clamping angle (10) may have to be disassembled from the ROLLER’S 

Bohrständer T by loosening the screws (52). Then clamping angle (10) is pushed 

onto the drill collar (13) of the ROLLER’S Centro SR so that the tapped holes 

(60) of the gearbox casing of Centro SR are positioned in relation to the screw 

holes of the clamping angle (10). Insert the spacer (without fi llister head screws) 

and align. Screw in the fi llister head screws included in the set and tighten. 

Tighten the fi llister head screws (8) of the clamping angle (10). Fix the mounted 

clamping bracket together with Centro SR to the ROLLER’S Bohrständer T as 

described in 3.4.

NOTICE

NOTICE

Remove dirt from between rack and slide immediately otherwise the slide can 

block. The rack and slide could also be damaged.

2.7  Laser drilling centre pointer

To position the ROLLER’S drill stand, the laser drilling centre pointer ((58) 

accessory art. no. 183604) is inserted into the clamping bracket (10) and 

tightened with the fi llister head screws (8). After switching on the laser drilling 

centre pointer, the drill stand can be aligned accurately at the marked drilling 

centre with the laser point and fi xed in position.

WARNING

WARNING

Do not look directly into the laser beam!

2.8  Drilling template ROLLER’S Bohrständer T

A drilling template ((64) accessory art. no. 183605) can be used for ROLLER’S 

Bohrständer T for easier location of the plug hole.

3 Operation 

  Use eye protection                   

  Use a respirator

  Use ear protection                   

  Use hand protection

Suitable safety vacuum cleaners/dust extractors, e.g. ROLLER’S Protector M, 

a respirator and disposable overalls must be used for work which could produce 

health hazardous dusts. Observe the national regulations.

Plug the mains plug into the socket. Check the function of the PRCD fault 

current circuit breaker (19) every time before starting drilling (see 2.1 Electrical 

connection); not necessary for ROLLER’S Centro DP.

Different material characteristics (concrete, steel-reinforced concrete, porous 

or solid masonry) require different and varying feed pressures on the diamond 

core drilling crown. Further infl uence is brought to  bear by the varying periph-

eral speed and size of the bit. It is inevitable, espe cially during manually controlled 

boring, that the machine will occasionally become slightly tilted as it operates. 

These factors, which are  merely examples of those that might arise, can lead 

to overloading of the drive unit during drilling operations. You will normally hear 

the turning speed of the motor drop, although the diamond core drilling crown 

may  become completely blocked. This can lead, especially during manually-

con trolled boring, to torque-related jarring – which will affect the operation. 

WARNING

WARNING

Note that the diamond core drilling crown can become blocked at any 

time. During hand-held core drilling, there is a risk of injury from the diamond 

core drilling machine being torn out of your hand and spinning round as the 

torque increases. Never use stage 1 for hand-held drilling with ROLLER’S 

Centro SR.

In order to simplify the handling of the machine, and to avoid damage, the 

ROLLER’S Centro S1, ROLLER’S Centro S3, ROLLER’S Centro S2/3.5, 

ROLLER’S Centro SR and ROLLER’S Centro DP are equipped with a multi-

function electronic system, along with a mechanical sliding clutch. The 

 multi- function electronic system performs the following tasks:

   ●  Initial-current limitation and jerk-free startup for smooth tapping. 

   ●  Limiting of idling speed in order to reduce noise and prevent wear to the motor 

and transmission.

   ●  Motor overload regulation relative to feed pressure. Before the drive unit can 

be overloaded by excessive feed pressure on the diamond core drilling crown, 

or as the result of a blockage, the motor supply current – and thus its turning 

speed – is reduced to a minimum. The drive unit does not shut down however. 

As the feed pressure is reduced, the turning speed of the drive unit is increased 

once more. This procedure, even if it is repeated several times in succession, 

prevents damage to the  drive unit. If the motor remains stopped despite the 

reduction in feed pres sure, the drive unit must be shut down and the diamond-

tipped annular bit freed manually (see 5.).

NOTICE

NOTICE

DO NOT switch the drive unit on and off to loosen a jammed diamond core 

drilling crown. This can cause a machine defect (see 5.1.).

3.1.1 Manually-controlled dry boring ROLLER’S Centro S1, ROLLER’S Centro 

S3 and ROLLER’S Centro SR (fi g. 4)

WARNING

WARNING

Use the counterholder (12) provided with the diamond core drilling machine for 

hand-held drilling. Losing control of the diamond core drilling machine can 

cause injuries. Always be prepared for blocking of the diamond core drilling 

crown. Never use stage 1 for hand-held drilling with ROLLER’S Centro SR. 

There is a risk of injury from the diamond core drilling machine being torn out 

of your hand and spinning round as the torque increases.

CAUTION

CAUTION   

When drilling dry by hand, the mounted water supply system (15) gets in the 

way and should be removed. The holder for the water connection must be 

sealed with the lid (14) otherwise dust can get into the machine.

Use dust extraction and suitable safety vacuum cleaner/dust extractor, e.g. 

ROLLER’S Protector M. Screw the selected ROLLER’S universal diamond core 

drilling crown/ROLLER’S universal diamond core drilling crown LS onto the 

drive spindle (11) of the drive unit and lightly hand-tighten. There is no need to 

 tighten it with a wrench. Use the G ½ UDKB tapping tool (49) (see 2.4.1.). Hold 

the drive unit by the motor handle (20) and the brace (12) and place the G ½ 

UDKB tapping tool (49) in the centre of the desired core hole. 

Switch on the 

drive unit with safety inching switch (21).

WARNING

WARNING

Never lock the safety inching switch (21) of the drive unit during hand-held 

drilling (Risk of injury)! If the drive unit is knocked out of your hand by a 

drilling (Risk of injury)!

drilling (Risk of injury)!

blocking diamond core drilling crown, a locked safety inching switch can no 

longer be unlocked. The drive unit will then run out of control, and the unit must 

be shut down by unplugging it from the mains  supply.

To make a tapping hole, drill until the diamond core drilling crown has bored to 

a depth of about 5 mm.

WARNING

WARNING

Protector out the mains plug! Screw out the G ½ UDKB tapping tool (49); 

loosen with a size 19 open-ended wrench if necessary. Using the dust-extrac-

tion system (see 2.4.2.). Continue boring until the core-drilling opera tion is 

complete. Always hold the drive unit by the insulated grip surfaces to safely 

absorb torque surges (risk of accident!). Check to ensure correct stability. Carry 

out larger core-drilling operations with the drill upright.
Make sure that the suction hose of the safety vacuum cleaner/dust extractor does 

not kink and impair the dust extraction. Also make sure that no fragments of stone 

or other objects jam in the diamond core drilling crown, the suction rotor ((46) 

accessory art. no. 180160) and/or the suction hose. Empty the dust bag of the 

safety vacuum cleaner/dust extractor early and clean/renew the fi lter regularly. 

Observe the operating instructions of the safety vacuum cleaner/dust extractor.

If the dust produced by dry boring is not removed, the diamond core drilling 

crown may overheat and suffer damage. There is also a danger of the compressed 

drilling dust in the drilling gap causing the diamond  core drilling crown to become 

blocked. If you need to work without the dust-extraction system when handling 

fi ne-pored materials, Protector the diamond core drilling crown out at regular 

intervals and push it back in with a slight turn, so that the drilling dust is expelled 

from the drilling gap. Suitable safety equipment, e.g. respirator, disposable 

overalls, must be used. Observe the national regulations.

NOTICE

NOTICE

Always wet drilling with ROLLER’S universal diamond core drilling crowns 

and ROLLER’S universal diamond core drilling crowns LS for steel-

reinforced concrete!

Always dry drilling with ROLLER’S dry diamond core drilling crowns LS 

with core drilling machines with micro-pulse technology. Suck off the 

resulting drilling dust with a suitable safety vacuum cleaner/dust extractor! 

Observe the national regulations.

3.1.2 Hand-held dry drilling ROLLER’S Centro DP (Fig. 10)

WARNING

WARNING

Use the counterholder (12) provided with the diamond core drilling machine for 

hand-held drilling. Losing control of the diamond core drilling machine can 

cause injuries. Always bear in mind that the diamond core drilling crown could 

block at any time. There is a risk of injury from the diamond core drilling machine 

being torn out of your hand and spinning round as the torque increases.

NOTICE

NOTICE

For dry drilling in concrete/steel-reinforced concrete with ROLLER’S Centro 

DP and the ROLLER’S dry diamond core drilling crowns LS, it is necessary to 

switch on the micro-pulse technology and use a suitable safety vacuum cleaner/

dust extractor of dust class M, e.g. ROLLER’S Protector M, for dust extraction. 

For drilling in masonry and other materials, the micro-pulse technology can be 

switched off and a suitable safety vacuum cleaner/dust extractor, e.g. ROLLER’S 

Protector M, must be used. Observe the national regulations.

Screw the selected ROLLER’S dry diamond core drilling crown TDKB LS onto 

the drive spindle (11) of the drive unit and lightly hand-tighten. There is no need 

to tighten it with an open-ended wrench. Use the G ½ TDKB tapping tool (49) 

(see 2.4.1.). Connect a suitable safety vacuum cleaner/dust extractor, e.g. 

ROLLER’S Protector M, to ROLLER’S Centro DP (see 2.4.2.). Switch off the 

micro-pulse technology of ROLLER’S Centro DP for tapping. To do this, turn 

the micro-pulse technology adjusting ring (Fig. 10 (69)) to the detent position 

so that the red markings are not in line. Hold the drive unit by the insulated grip 

surfaces of the motor handle (20) and the brace (12) and place the G ½ TDKB 

tapping tool (49) in the centre of the desired core hole. Switch on the drive unit 

with safety inching switch (21). 

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