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6.3.13 Fitting a diamond core bit
(drive unit with Hilti BL chuck)
– The core bit may become hot during use or during
sharpening. It may burn your hands. Wear protective
gloves when changing the core bit.
1. Lock the carriage in position on the column (activate
the carriage locking mechanism) and check that the
drill stand is fastened securely.
2. Open the chuck by turning it in the direction of the
"open” symbol (open brackets).
3. Push the connection end of the diamond core bit into
the chuck on the drive unit from below until it engages
with the gear teeth.
4. Close the chuck by turning it in the direction of the
"closed” symbol (closed brackets).
5. Check that the diamond core bit it is held securely
(check by hand for play and try to pull it away from
the chuck).
6.3.14 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
be used.
2. Move the gear selector switch to the desired setting
while rotating the core bit by hand.
6.4 Transport
-CAUTION-
Transport the drive unit, drill stand and diamond core
bit as separate units.
Use the wheel assembly (accessory) to facilitate trans-
port.
7. Operation
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).
4. Press the "ON" button on the PRCD ground fault inter-
rupter (the indicator must light).
7.2 Core bit diameters and corresponding
gears
Gear Core bit diameter Speed under no load
1 202–400 mm / 8" – 16" 320 r.p.m.
2 102–182 mm / 4" – 7" 550 r.p.m.
3 25– 97 mm / 1" – 3
3
/
4
"1120 r.p.m.
7.3 Operating the drilling machine without the water
collector system and wet vacuum cleaner
-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
volume of water is flowing.
2. Press the on / off switch on the drive unit (switch posi-
tion " I ”).
3. Release the carriage lock.
4. Turn the hand wheel until the core bit comes into con-
tact with the material in which the hole is being drilled.
5. Apply only light pressure until the core bit has become
centered and then gradually increase the pressure.
-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.
(35 pages)
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