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6.3.12 Fitting a diamond core bit
(drive unit with Hilti BL chuck)
-DANGER-
Do not use damaged core bits. Check the core bits for
en
chipping, cracks, or heavy wear each time before use.
Do not use damaged tools. Fragments of the workpie-
ce or a broken core bit may be ejected and cause injury
beyond the immediate area of operation.
-NOTE-
Diamond core bits must be replaced when the cutting
performance and/or rate of drilling progress drops sig-
nificantly. This generally is the case when the segments
reach a height of less than 2 mm.
-CAUTION-
Fitting and positioning the core bit incorrectly can lead
to hazardous situations as parts can break and fly off.
Check that the core bit is seated correctly.
-CAUTION-
– The core bit may become hot during use or during
7. Operation
-CAUTION-
– The machine and the core drilling operation emit noise.
Excessive noise may damage the hearing. Wear ear
protection.
– The core drilling operation may cause hazardous frag-
ments to fly off. Flying fragments may cause injury to
the eyes or other parts of the body. Wear eye protec-
tion and a hard hat.
– To avoid injury by sharp edges, wear protective gloves
when handling core bits.
– Wear non-slip shoes or boots to avoid injury as a result
of accidents caused by slippery surfaces.
7.1 Switching on and checking the PRCD ground fault
interrupter
(use an isolating transformer with the GB version)
1. Plug the drive unit supply cord into an electric sock-
et with earth connection.
2. Press the "ON" button on the PRCD ground fault inter-
rupter (the indicator must light).
3. Press the "TEST" button on the PRCD ground fault
interrupter (the indicator must go out).
-DANGER-
If the indicator continues to light, further operation of
the machine ist not permissible. Have the machine repair -
ed by a qualified specialist using genuine Hilti spare parts.
26
Printed: 22.11.2013 | Doc-Nr: PUB / 5069597 / 000 / 03
All manuals and user guides at all-guides.com
sharpening. It may burn your hands. Wear protective
gloves when changing the core bit.
1. Lock the carriage in position on the column (activate
2. Open the chuck by turning it in the direction of the
3. Push the connection end of the diamond core bit into
4. Close the chuck by turning it in the direction of the
5. Check that the diamond core bit it is held securely
6.3.13 Selecting drilling speed
-CAUTION-
Do not change gear while the motor is running. Wait
until rotation has stopped.
1. Select the gear according to the core bit diameter to
2. Move the gear selector switch to the desired setting
4. Press the "ON" button on the PRCD ground fault inter-
7.2 Core bit diameters and corresponding
Gear
1
2
3
When coring heavily reinforced or very hard concrete
(e.g. flint or high-performance concrete), particular-
ly with diameters 82 mm (3
6
3
/
7.3 Operating the drilling machine without the water
-NOTE-
The water flows away in uncontrolled fashion. Overhead
drilling is not permissible!
-CAUTION-
Do not allow water to come into contact with the drive
unit.
7.3.1 Switching on
1. Open the water flow regulator slowly until the desired
2. Press the on / off switch on the drive unit (switch posi-
the carriage locking mechanism) and check that the
drill stand is fastened securely.
"open" symbol (open brackets).
the chuck on the drive unit from below until it engages
with the gear teeth.
"closed" symbol (closed brackets).
(check by hand for play and try to pull it away from
the chuck).
be used.
while rotating the core bit by hand.
rupter (the indicator must light).
gears
Core bit diameter
152–400 mm (6" – 16")
82–162 mm (3
1
/
" – 6
4
25– 82 mm (1" – 3
1
/
4
"), it is recommended to use the lower gear.
8
collector system and wet vacuum cleaner
volume of water is flowing.
tion " I ").
3
/
")
8
1
/
")
4
") and 152–162 mm (6"–
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