User Manual

8
Water should always be used to cool and lubricate the bit and to flush out
abrasive particles formed while drilling.
To connect the water supply. Attach the quick-release water coupling to a
water hose.
WARNING: Never allow water to enter the motor. It could lead to an
electric shock.
WARNING: Check all connections of the water feed system to ensure there are no leaks. Inspect hoses
and other critical parts which could deteriorate.
WARNING: The maximum water pressure should not exceed 70 psi (4 bar).
Use a water collector with a wet vacuum to collect cooling water if nearby objects could be damaged by water.
WARNING: Never allow water to enter the motor. A perfectly functioning water collector set up must be
used for any drilling performed at an upward angle.
SPECIAL INSTRUCTIONS FOR DRY DRILLING:
(Dry drilling models only)
Dry drilling is a different process from wet drilling. With wet drilling, it is more of a grinding process and you
need a lot of downforce to grind away the material. But with dry drilling, it is more of a cutting process and you
must use a much lighter touch.
When dry drilling, you must not push too hard. Allow the tool to work at its own pace.
Dry drilling is normally done in softer materials. Note that in very hard materials it may not be possible to drill
dry.
PERCUSSION SELECTOR
On models which are equipped with soft percussion for dry drilling, the percussion function can be turned on
and off.
The selector is a knurled collar at the front of the gearbox. To select,
first unplug the machine, then push down on the collar against the
spring tension to disengage the teeth of the selector from the slots. It is
sometimes helpful to pull out on the spindle to give the collar enough
room to push in. Observe the symbol laser engraved on the selector
and turn to either the "Hammer" symbol for soft percussion or the "No
Hammer" symbol to turn off the percussion.
Open
Closed
Water Feed Valve
Hammer (percussion ON)
No Hammer (percussion OFF)