Roller Bohrstander S2, Instruction Manual

26

WARNING

WARNING

Never lock the safety inching switch (21) of the drive unit when holding 

the drill by hand (risk of injury)! If the drive unit is knocked out of your hand 

by a 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 can only 

be brought to a standstill by Protectoring out the mains plug.

Tap until the diamond core drilling crown has penetrated to a depth of approx. 

5 mm. 

WARNING

WARNING

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

loosen with a size 19 open-ended wrench if necessary. Use a dust extractor 

(see 2.4.2). Switch on the micro-pulse technology of ROLLER’S Centro DP. To 

do this, turn the micro-pulse technology adjusting ring (Fig. 10 (69)) to the 

detent position so that the red markings are in line. Continue drilling until the 

core hole is fi nished. Always hold the drive unit by the insulated grip surfaces 

to safely absorb torque surges (risk of accident!). Make sure that you have a 

safe footing. Carry out larger core-drilling operations with a drill stand.

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 loosened 

lumps of rock or other objects jam in the diamond core drilling crown, the drive 

unit’s suction rotor 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 drilling is not removed, the diamond core drilling 

crown may overheat and suffer damage. There is also a risk that the drilling 

dust compressed in the drilling gap will block the diamond core drilling crown.

NOTICE

NOTICE

If insuffi cient thrust pressure is applied when performing hand-held drilling with 

ROLLER’S Centro DP and micro-pulse technology switched on, the micro-pulse 

technology adjusting ring (Fig. 10 (69)) can turn during drilling and switch off 

the micro-pulse. Switch off the drive unit in this case. Turn the micro-pulse 

technology adjusting ring (Fig. 10 (69)) to the detent position so that the red 

markings are in line. Continue drilling with increased thrust pressure. It is 

recommended to use a drill stand if the micro-pulse technology switches off 

repeatedly. 

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

S3 and ROLLER’S Centro SR

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. 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.

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. 

Connect the water supply (see 2.5.). Using the tapping tool (49) (see 2.4.1.). 

Hold the drive unit by the insulated grip surfaces of the motor handle (20) and 

the brace (12) and place the tapping tool in the centre of the desired core hole.

Switch on the drive unit with safety inching switch (21).

WARNING

WARNING

Use the counter-holder (12) delivered with the power tool for hand-held 

drilling. Losing control of the power tool can cause injuries. Always bear in 

mind that the diamond core drilling crown could block at any time. Never use 

stage 1 for hand-held drilling with ROLLER’S Centro SR. There is a risk of 

injury from the power tool being torn out of your hand and spinning round as 

the torque increases. 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. Remove the tapping tool (49), using a SW 19 wrench 

if required. Adjust the pressure in the water supply system (15) to a point where 

there is a moderate, but constant, fl ow for water from the bore hole. Insuffi cient 

water pressure (where the waste material fl ows out of the bore hole as thick 

sludge rather than liquid) is as bad for the working effi ciency and service life 

of the diamond core drilling crown as is excessive water pressure, which causes 

completely clear water to fl ow out. Continue boring until the core-drilling 

operation is complete. Always hold the drive unit by the insulated grip surfaces 

to safely absorb torque surges (risk of injury!). Check to ensure correct stability. 

Carry out larger core-drilling operations with the drill upright. Suck up the drilling 

water preferably with a suitable dry and wet vacuum cleaner, e.g. ROLLER’S 

Protector L or ROLLER’S Protector M.

WARNING

WARNING

Ensure that no water is allowed to get into the drive unit motor during 

operation. DANGER OF FATAL ACCIDENT!

WARNING

WARNING

ROLLER’S Centro DP is delivered without a PRCD fault current circuit breaker 

and is suitable for dry drilling only. Wet drilling with, as well as connection of a 

water hose to the ROLLER’S Centro DP is not permitted. There is a danger of 

electric shock.

3.3  Ways of securing the drill upright

You are recommended to secure the drill upright without the drive unit and 

diamond core drilling crown. The drill upright becomes top- heavy when the 

drive unit is attached. This makes the task of securing it  more diffi cult. 

3.3.1 Securing with plugs in concrete with knock-in anchor (fi g. 5)

For core-drilling operations in concrete, the drill upright should be  secured with 

a knock-in anchor (steel plug). Proceed as follows:
Mark plug hole for ROLLER’S Bohrständer S2 at distance of approx. 200 mm, 

for ROLLER’S Bohrständer T with clamping angle for ROLLER’S Centro S1, 

ROLLER’S Centro S3, ROLLER’S Centro SR and ROLLER’S Centro DP approx. 

250 mm, for ROLLER’S Bohrständer T with Centro S2/3.5 approx. 290 mm 

from the centre of the core hole. Set plug hole Ø 15 mm, drilling depth approx. 

55 mm. Clean the bore hole, hit the knock-in anchor (23) in with a hammer and 

spread with the fl attener (24). Use only knock-in anchors of approved type (art. 

no. 079005). Observe approval! Screw the knurled threaded rod (25) into the 

knock-in anchor and tighten it by holding a tool such as a screw driver in the 

transverse hole of the knurled threaded rod. Turn the four adjustment screws 

(5) on the drill upright until they no longer protrude from the sole plate. Position 

the drill upright with slot (7) on the knurled threaded rod, while observing the 

desired position of the core-drilling operation. Fit the washer (26) to the knurled 

threaded rod and use an SW 30 wrench to secure the fast-tightening nut (27). 

Turn all four adjustment screws (5) with the SW 19 wrench to compensate for 

irregularities in the ground surface. Take care to ensure that the locknuts do 

not prevent movement of the adjustment screws. Tighten the locknuts as 

required. Using the 4 adjustment screws (5) and the bull’s eye level  ((56) acces-

sory Art. No. 182010), the drill stand can be aligned to drill a right-angled hole.

3.3.2 Securing with plugs in masonry, with expansion anchor (anchor sleeve) 

(fi g. 6)

For core-drilling operations in masonry, the drill upright should be secured with 

an expansion anchor (anchor sleeve). Proceed as follows:
Mark plug hole for ROLLER’S Bohrständer S2 at distance of approx. 200 mm, 

for ROLLER’S Bohrständer T with clamping angle for ROLLER’S Centro S1, 

ROLLER’S Centro S3, ROLLER’S Centro SR and ROLLER’S Centro DP approx. 

250 mm, for ROLLER’S Bohrständer T with Centro S2/3.5 approx. 290 mm 

from the centre of the core hole. Set plug hole Ø 20 mm, drilling depth approx. 

85 mm. Clean the bore hole, and push the expansion anchor (28) with knurled 

threaded rod (25) into the hole. Screw the knurled threaded rod (25) fully home 

and tighten it by holding a tool such as a screw driver in the transverse hole of 

the rod. Turn the four adjustment screws (5) on the drill upright until they no 

longer protrude from the sole plate. Position the drill upright with slot (7) on the 

knurled threaded rod, while observing the desired position of the core-drilling 

operation. Fit the  washer (26) to the knurled threaded rod and use an SW 30 

wrench to secure the fast-tightening nut (27). Turn all four adjustment screws 

(5) with the SW 19 wrench to compensate for irregularities in the ground surface. 

Take care to ensure that the locknuts do not prevent movement of the adjust-

ment screws. Tighten the locknuts as required. Using the 4 adjustment screws 

(5) and the bull’s eye level  ((56) accessory Art. No. 182010), the drill stand can 

be aligned to drill a right-angled hole.

The expansion anchor can be removed after completion of the core-drilling 

operation for reuse elsewhere. To do so, turn the knurled threaded rod back 

by about 10 mm. A light tap on the knurled threaded rod will release the pin of 

the expansion anchor, allowing it to be removed. 

3.3.3 Fastening in masonry with quick clamping set 500

In porous masonry it is to be expected that plug fastening of the drill stand will 

not be successful. In this case we recommend drilling completely through the 

wall with a drill diameter of 18 mm and fastening the drill stand with the quick 

clamping set 500 ((63) accessory art. no. 183607).

3.3.4 Securing with vacuum suction

The vacuum fastening is not approved for drilling with ROLLER’S Centro DP.
The drill stand can be held by a vacuum for core drilling in parts with a smooth 

TT

surface (e.g. tiles, marble) in which no dowel pin fastening is possible. The 

vacuum fastening (accessory art. no. 183603) can only be used for ROLLER’S 

Bohrständer T. The suitability of the parts for vacuum fastening must be checked. 

Coated, laminated surfaces or tiles can come off. The vacuum fastening may 

only be used on regular or smooth surfaces and never on irregular, rough 

surfaces because otherwise the vacuum fastening can come loose and cause 

injuries. Proceed as follows:

Place the sealing ring (43) into the channel on the underside of the  sole plate 

(6). Close off the slot (7) in the sole plate (6) with the cover plate with hose 

connection (42). Connect vacuum pump ((67) accessory art. no. 183670) to 

hose connection (41) and suck drill stand tightly to the base. Check the vacuum 

pressure constantly during drilling (pressure gauge). Observe the operating 

eng eng