Roller Bohrstander S2, Instruction Manual

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2.3.2 Removing the diamond core drilling crown

WARNING

WARNING

Unplug from the mains power supply! Use an SW 32 wrench to hold the 

Unplug from the mains power supply!

Unplug from the mains power supply!

drive spindle (11) and an SW 41 wrench to loosen the diamond core drilling 

crown (48). 

Always unscrew the diamond core drilling crown from the drive unit when the 

drilling task is fi nished. With wet-drilling operations in particular,  there is also 

a danger of the diamond core drilling crown becoming corroded, making it 

diffi cult to remove.

NOTICE

NOTICE

The casing pipes of the diamond core drilling crown are not hardened. Hitting 

(with tools) and impact (during transport) on the  casing pipe will lead to damage 

that is likely cause the diamond core drilling crown and/or drilling core to become 

seized. The diamond core drilling crown may then be rendered unusable.

2.3.3 Sharpening the diamond core drilling crown

ROLLER’S Universal diamond core drilling crowns have roof-shaped diamond 

segments and do not have to be sharpened in the as-delivered state. At the 

right thrust pressure and possibly by adding water, the diamond segments 

sharpen themselves. Unsuitable thrust pressure as well as dry drilling in concrete 

leads to the diamond segments being “polished” and no longer being able to 

cut. If this occurs, use the diamond core drilling crown to drill 10 mm to 15 mm 

into sandstone, asphalt or a sharpening stone ((55) accessory art. no. 079012) 

in order to sharpen the diamond-tipped segments once more.
ROLLER’S dry diamond core drilling crowns LS are delivered sharpened. 

The diamond-tipped segments sharpen themselves with the micro-pulse tech-

nology on the the core drilling machine switched on, with the use of a safety 

vacuum cleaner/dust extractor of dust class M, e.g. ROLLER’S Protector M 

(Art. No. 185501) and with the correct thrust pressure. If the diamond-tipped 

segments are polished due to unsuitable thrust pressure, for example, and 

therefore no longer cut properly, they can be sharpened. In this case, the 

diamond core drilling crown is drilled 10 to 15 mm deep into sandstone, asphalt 

or a sharpening stone ((55) accessory Art. No. 079012) to resharpen the 

diamond-tipped segments.

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

S3 and ROLLER’S Centro SR (fi g. 4), ROLLER’S Centro DP (fi g. 10)

Secure the holder-up (12) to the drill collar (13) of the drive unit.

WARNING

WARNING

Only use the tool held by hand with the counterholder (12) fi tted (danger 

counterholder

counterholder

of injury)! Never perform hand-held dry drilling with ROLLER’S Centro 

SR in stage 1. The resulting high torque can lead to injury.

Inhalation of the dusts produced by dry drilling is harmful to the health. Observe 

the national regulations. It is recommended to use a safety vacuum cleaner/

dust extractor of dust class M, e.g. ROLLER’S Protector M (Art. No. 185501) 

with the appropriate fi lter; observe the operating instructions of the safety 

vacuum cleaner/dust extractor. Use the suction rotor ((46) accessory Art. No. 

180160) with ROLLER’S Centro S1, ROLLER’S Centro S3 and ROLLER’S 

Centro SR. Connect the safety vacuum cleaner/dust extractor to the suction 

hose connection (68) on ROLLER’S Centro DP.

CAUTION

CAUTION   

The mounted water supply system (15) gets in the way of hand-held dry drilling 

with ROLLER’S Centro S1, ROLLER’S Centro S3 and ROLLER’S Centro SR 

and should therefore be disconnected. Remember to shut off the water inlet 

with its sealing cap (14) to prevent dust from getting into the machine. 

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.

2.4.1 Only use tapping tool G ½ UDKB for ROLLER’S Centro S1, Centro S3 and 

Centro SR and tapping tool G ½ TDKB for Centro DP

Manually-controlled tapping is made considerably easier, thanks to the ROLL-

ER’S tapping tool (49). This is fi tted with a conventional hardened- metal Ø 8 

mm masonry bit, which is secured in place with an SW 3  hexa gon socket head 

wrench. The G ½ thread is used to screw the tapping tool into the spindle of 

the drive unit, where it is gently tightened with an SW 19 wrench. 

Due to different lengths of the ROLLER’S UDKB and UDKB LS to the ROLLER’S 

TDKB LS, the G ½ UDKB tapping tool cannot be used for the ROLLER’S TDKB 

and the G ½ TDKB tapping tool not for the ROLLER’S UDKB and UDKB LS!

2.4.2 Dust extraction ROLLER’S Centro S1, ROLLER’S Centro S3 and ROLLER’S 

22

Centro SR (fi g. 4), ROLLER’S Centro DP (fi g. 10)

WARNING

WARNING

Inhalation of the dusts produced by dry drilling is harmful to the health. Observe 

the national regulations. It is recommended to use a dust extractor to remove 

drilling dust from the core bore. For ROLLER’S Centro S1, ROLLER’S Centro 

S3 and ROLLER’S Centro SR, this consists of the ROLLER’S suction rotor 

((46) accessory Art. No. 180160) for dust extraction and a safety vacuum 

cleaner/dust extractor of dust class M suitable for commercial use, e.g. ROLL-

ER’S Protector M (Art. No. 185501).. Observe the operating instructions of the 

safety vacuum cleaner/dust extractor. The suction rotor (46) is screwed to the 

drive spindle (11) of the drive unit using the G ½ connector. The combined 

annular core bit connector (47) on the opposite side permits the fi tting of diamond 

core drilling crowns with female thread UNC 1¼ and the attachment of the 

tapping tool (49).

ROLLER’S Centro DP has an integrated suction rotor for dust extraction. The 

suitable safety vacuum cleaner/dust extractor of dust class M, e.g. ROLLER’S 

Protector M (Art. No. 185501) is connected directly to ROLLER’S Centro DP 

at the suction hose connection (68).

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

crown may overheat and suffer damage. There is also a risk of injury when the 

drilling dust compressed in the gap blocks the diamond core drilling crown.

2.5  Wet boring ROLLER’S Centro S1, Centro S3, Centro S2/3.5 and Centro SR

Optimum drilling performance will only be achieved if the diamond  core drilling 

crown is provided with a constant supply of water. This keeps the diamond core 

drilling crown cool and allows drilled-out material to be swilled from the bore 

hole. To connect the water supply system (15), remove the cover (14) and 

attach the water supply system with the fi llister head screw supplied. The 

quick-action coupling with  water shutoff device should be fi tted with a ½” water 

hose. Water pressure should not exceed 4 bar.

If there is no direct water connection available, water throughfl ow can be 

achieved using the water pressure tank ((51) accessory art. no. 182006). Be 

aware that there is suffi cient water fl ow.

When drilling with ROLLER’S Bohrständer T or ROLLER’S Bohrständer S2 the 

water extractor ((44) accessory art. no. 183606) can be used. See Fig. 11 and 

12 for assembly. This consists of a water collecting ring, a pressure ring and a 

12

12

rubber washer (45). The water extractor is fi xed to the base of the drilling column 

(1). The water collecting ring is connected to a wet vacuum cleaner suitable 

for commercial use, e.g. ROLLER’S Protector L or ROLLER’S Protector M. 

The rubber washer (45) must be cut out exactly to fi t the diameter of the diamond 

core drilling crown.

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.

2.6  Boring with a drill upright

Good results can be obtained by operating with a drill upright. The purpose of 

the drill upright is to guide the drive unit. Its power transfer rack-and-pinion 

drive system ensures both hole-tapping with „feel“ and powerful infeed of the 

diamond core drilling crown. ROLLER’S Centro S1, ROLLER’S Centro S3, 

ROLLER’S Centro SR and ROLLER’S Centro DP can be mounted optionally 

on the ROLLER’S Bohrständer S2 or ROLLER’S Bohrständer T drill stand.

ROLLER’S Centro S2/3,5 must be mounted on ROLLER’S Bohrständer T.

In ROLLER’S Bohrständer T the clamping angle (10) or the ROLLER’S Centro 

S2/3.5 must be mounted. The clamping angle (10) or the ROLLER’S Centro 

S2/3.5 must be inserted in the guide (53) and fastened with the screws (52) for 

this.

The boring trestle (1) of ROLLER’S Bohrständer T is infi nitely adjustable up to 

45°. This allows angled core drilling operations to be carried out within this 

angle range. The degree marks on the struts (40) serve for orientation. To adjust 

the angle, the two screws (31) at the foot of the boring trestle (1) are removed. 

The hexagon head screw (37) and all the screws on the two struts must be 

loosened. The boring trestle can now be swivelled to the desired position. 

Retighten all screws before proceeding. The screws (31) are not installed to 

produce the angled core drilling operation(s). The swivel adjustment of the 

boring trestle causes the useful stroke range of the feed device of the ROLLER’S 

Bohrständer T to decrease more or less. This means that you may have to use 

corresponding annular bit extensions ((50) accessory art. no. 180155) (see 

3.7).

The feed slide (2) can be locked on the drill stands. Tighten the wing nut (32) 

for this. Locking prevents such undesired movements as the accidental lowering 

of the drive unit while the diamond core drilling crown is being replaced.

On all drill stands the feed lever (4) can be fi tted to the right or left of the feed 

slider (2) according to local conditions (not preassembled in the as-delivered 

state of ROLLER’S Bohrständer S2). Lock the feed slider as described above 

for this. Unscrew the fi llister head screw (34). Protector the feed lever off the 

feed shaft and push it onto the shaft stump opposite. Screw in and tighten the 

fi llister head screw (34).

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