Roller Centro S 1 Instructions D'emploi page 16

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is also a danger of the diamond core drilling crown becoming corroded,
making it difficult to remove.
Important: 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 diamond core drilling crowns are supplied ready-sharpened.
If feed pressure is kept at the correct level, the diamond-tipped seg-
ments will sharpen themselves. Incorrect feed pressure can lead to the
diamond-tipped segments becoming „polished", which causes their
cutting performance to diminish. If this occurs, use the diamond core
drilling crown to drill 10 mm to 15 mm into sandstone, asphalt or a shar-
pening stone (available as an accessory) in order to sharpen the dia-
mond-tipped segments once more.
2.4. Manually-controlled dry boring ROLLER'S Centro S1 and
ROLLER'S Centro S3
Secure the holder-up (12) to the drill collar (13) of the drive unit.
Important: Never carry out manually-controlled drilling without first
fitting the holder-up. DANGER OF ACCIDENTS!
The water supply system (15) gets in the way of manually-controlled dry
boring, and it should therefore be disconnected. Remember to shut off
the water inlet with its sealing cap (14) to prevent dust from getting into
the machine.
Important: Always wet drilling for steel-reinforced concrete!
2.4.1. Tapping tool
Manually-controlled tapping is made considerably easier, thanks to the
ROLLER'S tapping tool (49). This is fitted with a conventional harde-
ned-metal Ø 8 mm masonry bit, which is secured in place with an SW
3 hexagon socket head wrench. The G
tapping tool into the spindle of the drive unit, where it is gently tightened
with an SW 19 wrench.
2.4.2. Dust extraction ROLLER'S Centro S1 and ROLLER'S Centro S3
We recommend the use of a dust extraction system to remove drilling
dust from the machine during core-drilling operations. This consists of
the ROLLER'S suction rotor for dust extraction (available as an acces-
sory) and a fine-dust suction extractor designed for industrial use. The
suction rotor (46) is screwed to the drive spindle (11) of the drive unit
using the G 1 / connector. The combined annular core bit connector (47)
2
on the opposite side permits the fitting of diamond core drilling crowns
with female thread UNC 1 1 /
4
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 gap causing the diamond core
drilling crown to become blocked.
2.5. Wet boring
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), re-
move the cover (14) and attach the water supply system with the fillister
head screw supplied. The quick-action coupling with water shutoff de-
vice should be fitted with a
exceed 4 bar.
If there is no direct water connection available, water throughflow can
be achieved using the water pressure tank (51) (accessory). Be aware
that there is sufficient water flow.
A water extractor unit (44) (accessory) should be used if required. This
consists of a water-collection ring and a pressure ring which is secured
to the foot of the boring trestle (1). The water-collection ring is to be
connected to a wet-suction extractor designed for industrial use. The
size and shape of the rubber gasket (45) in the water-collection ring must
exactly match the diameter of the annular bit.
2.6. Boring with a drill upright
Good results can be obtained by operating with a drill upright. The pur-
1 / thread is used to screw the
2
and the attachment of the tapping tool (49).
1 / " water hose. Water pressure should not
2
pose 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 po-
werful infeed of the diamond core drilling crown. ROLLER'S Centro S1
and ROLLER'S Centro S3 can be mounted optionally on the ROLLER'S
drill upright S or ROLLER'S drill upright D. ROLLER'S Centro S2/3,5
must be mounted on ROLLER'S drill upright D 300.
In the case of the ROLLER'S drill upright S, the feed slider (2) supplied
with the unit must be inserted into the boring trestle (1), along with the
feed lever and clamping angle, and advanced by turning the feed lever
(4). The two reverse adjustment screws (5) should also be screwed in.
With the ROLLER'S drill upright D, the clamping angle (10) and short
fillister head screws (supplied with the unit) should be screwed to the
feed slider (2). In this configuration, the ROLLER'S drill upright D can
be used to drill at up to Ø 132 mm. For larger core-drilling operations,
the spacer (38, supplied with unit) must be inserted between the feed
slider (2) and clamping angle (10), and secured with the long fillister
head screws. The spacer should however only be fitted if you actually
intend to drill at > Ø 132 mm, as the drive unit runs in a more stable way
without the spacer.
ROLLER'S drill upright D 300 is immediately ready for operation upon
delivery.
The boring trestle (1) of ROLLER'S drill upright D and D 300 is infinitely
adjustable up to an angle of 45°. This allows angled core-drilling ope-
rations to be carried out within this range. To adjust the angle, use a
wrench to loosen the screws (37) at the foot of the boring trestle (1),
along with all the screws on the two struts (40). The boring trestle can
now be swivelled to the desired position. Retighten all screws before
proceeding. The swivel adjustment of the boring trestle causes the use-
ful stroke range of the feed device of the ROLLER'S drill upright D to in-
crease or decrease accordingly. This means that you may have to use
corresponding annular-bit extensions (see 3.7.).
The feed slide (2) can be locked in certain positions on the drill stands.
In the case of the ROLLER'S drill upright S, this is done by moving the
slotted sleeve (3) on the feed shaft, while at the same time turning the
feed lever axially in relation to the feed-mechanism housing until it en-
gages. On ROLLER'S drill upright D and D 300, push the sliding bolt
(36) in the direction of the struts and turn the feed lever (4) at the same
time until the sliding bolt snaps into place.Locking prevents such unde-
sired movements as the accidental lowering of the drive unit while the
diamond core drilling crown is being replaced.
On the ROLLER'S drill upright S, ROLLER'S drill upright D and D 300,
the feed lever (4) can be secured, in accordance with operating condi-
tions, on either the right- or left-hand side of the feed slider (2). The feed
slider should be locked, as described above, when doing so. In the case
of the ROLLER'S drill upright S, the turning handle (9) and two washers
on the opposite side of the feed lever are removed; then the feed shaft
is pulled out of the feed-mechanism housing, along with the feed handle,
and pushed in again from the other side. Refit the washers and turning
handle. On the ROLLER'S drill upright D and D 300, only the feed lever
(4) is pulled off the feed shaft. It is then pushed onto the shaft butt end
on the opposite side.
3. Operation
Connect by plugging into the mains supply. Always check the PRCD
fault-current safety switch (19) for correct functioning before starting a
drilling operation. To do so, press the RESET button (17) and watch for
the red indicator light (16, operating status). The indicator light should
go off when the mains plug is pulled out. Push the mains plug back into
its socket and press the RESET button. The indicator light should be
red (operating status). Press the TEST button (18), and the indicator
light should go out. Press the RESET button (17) again, and the drive
unit is ready for operation.
Important: DO NOT start drilling operations if any of the above PRCD
functions are defective! DANGER OF FATAL ACCIDENT!
Different material characteristics (concrete, steel-reinforced concrete,
porous or solid masonry) require different and varying feed pressures
on the diamond core drilling crown. Further influence is brought to bear
by the varying peripheral speed and size of the bit. It is inevitable, espe-
cially during manually controlled boring, that the machine will occasio-
nally become slightly tilted as it operates. These factors, which are merely
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