20 ENGLISH
NOTICE:
Never use “rotation with hammering”
when the drill chuck is installed on the tool.
The
drill chuck may be damaged.
Also, the drill chuck will come off when reversing the
tool.
NOTICE:
Pressing excessively on the tool will
not speed up the drilling.
In fact, this excessive
pressure will only serve to damage the tip of your drill
bit, decrease the tool performance and shorten the
service life of the tool.
Set the action mode changing knob to the symbol.
For model GRH08
Optional accessory
Attach the chuck adapter to a keyless drill chuck to
which 1/2"-20 size screw can be installed, and then
install them to the tool. For details on how to install
the adapter into the chuck, refer to the instructions on
installing drill bit.
1
2
Fig.50
►
1.
Keyless drill chuck
2.
Chuck adapter
For model GRH09
Use the quick change drill chuck as standard equip-
ment. For details on how to install the quick change drill
chuck, refer to the instructions on changing the quick
change chuck for SDS-plus.
Hold the ring and turn the sleeve counterclockwise to
open the chuck jaws. Place a drill bit in the chuck as
far as it will go. Hold the ring firmly and turn the sleeve
clockwise to tighten the chuck.
2
1
Fig.51
►
1.
Sleeve
2.
Ring
To remove the drill bit, hold the ring and turn the sleeve
counterclockwise.
Diamond core drilling
NOTICE:
If performing diamond core drilling
operations using “rotation with hammering”
action, the diamond core bit may be damaged.
When performing diamond core drilling opera-
tions, always set the action mode changing knob to
the position to use "rotation only" action.
Blow-out bulb
Optional accessory
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Fig.52
Using dust cup set
Optional accessory
Fit the dust cup set against the ceiling when operating
the tool.
Fig.53
NOTICE:
Do not use the dust cup set when drill-
ing in metal or similar. It may damage the dust
cup set due to the heat produced by small metal
dust or similar.
NOTICE:
Do not install or remove the dust cup
set with the drill bit installed in the tool. It may
damage the dust cup set and cause dust leak.