Hilti DD 160 Manual page 40

6.5 Using the Rota-Rail (column swivel)
The Rota-Rail allows quick and easy access to the hole or core being drilled, with no need to partly or fully
dismantle the system.
WARNING
Risk of injury caused by incorrect use! The drill stand can be damaged or it can break.
▶ Never use the Rota-Rail as a column extension.
1. Lock the carriage with the carriage lock. Check to ensure that it is securely fastened.
2. Remove the end stop screw from the rear section of the column.
3. Secure the Rota-Rail so that the toothed racks are facing the same direction.
4. Tighten the screw on the Rota-Rail.
5. Release the carriage lock and run the carriage on to the Rota-Rail.
6. Slacken the securing screws of the Rota-Rail and pivot the machine with the Rota-Rail to the left or right.
This will give you access to the drill hole.
7. Remove the core or change the core bit.
8. With the Rota-Rail, pivot the machine back to its original position and tighten the securing screws of the
Rota-Rail.
9. After removing the Rota-Rail, refit the end stop screw to the end of the rail.
6.6 Switching off the diamond core drilling machine
WARNING
Risk of personal injury and material damage The diamond core bit fills with water during overhead drilling.
The diamond core drilling machine may become damaged and the risk of electric shock is increased.
▶ As a first step, carefully allow the water to drain away after completing overhead drilling. This is done
by disconnecting the water supply from the water flow regulator and draining the water by opening the
water flow regulator. Do not allow the water to run over the motor and cover.
1. Connect the water flow regulator to the diamond core drilling machine.
2. Remove the diamond core bit from the hole.
3. Lock the diamond core drilling machine with the carriage lock.
4. Switch off the diamond core drilling machine.
5. Switch off the wet-type industrial vacuum extractor, if used.
6.7 Procedure in the event of the core bit jamming
If the bit jams the safety clutch disengages. The electronic control system then switches the motor off and
subsequently on again; this is done twice without manual intervention by the user. If this does not free the
core bit, the electronic control system switches the motor off for 90 seconds. You can free a jammed bit
manually, as follows:
6.7.1 Using an open-end wrench to free the core bit
1. Unplug the supply cord from the power outlet.
2. Grip the diamond core bit with a suitable open-end wrench close to the connection end and turn the
diamond core bit to free it.
3. Plug the supply cord into the power outlet.
4. Resume the drilling operation.
6.7.2 Using the hand wheel to free the core bit
1. Unplug the supply cord from the power outlet.
2. Free the core bit from the base material by turning the hand wheel.
3. Plug the supply cord into the power outlet.
4. Resume the drilling operation.
6.8 Removal of the diamond core drilling machine
1. Unplug the supply cord from the power outlet.
2. Remove the diamond core bit from the BI+ chuck. → page 32
34 English
Printed: 09.08.2019 | Doc-Nr: PUB / 5069586 / 000 / 08
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