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"Vario-Lock"
(Fig. 12)
The Vario-Lock position is intended for use with
chipping bits such as bull points, spades, goug-
es, etc. Choose a position which is best suited
for your operation.
Turn the mode selector dial, to the "vario-lock"
setting. Next, rotate the locking sleeve, along
with the accessory, to the desired position.
Then turn the mode selector dial to the "ham-
mer only" setting and slightly turn the locking
sleeve to have it automatically lock into a defi-
nite position.
Slip Clutch
The tool has a internal pre-set slip clutch. The
output spindle will stop rotating if the accessory
binds and overloads the tool.
Kickback Control
The rapid shut-off feature enables better control
and improves user's comfort. The power tool
automatically shuts off in case of sudden and
unexpected rotation of the power tool around
the drilling axis (for example jamming of the drill
bit in reinforcing steel or wedging application
tool).To restart the machine, release the On/Off
switch and then actuate again.
Kickack Control can activate only when the pow-
er tool is running at maximum operating speed
and can rotate freely around the drill bit axis.
Tool Tips
Following a few simple tips will reduce wear on
the tool and the chance of injury to the operator.
Note: The high efficiency available from the ro-
tary hammers can only be obtained if sharp and
undamaged accessories are used. The "cost" to
maintain sharp and undamaged accessories is
more than offset by the "time saved" in operat-
ing the tool with sharp accessories.
You will extend the life of your bits and do neater
work if you always put the bit in contact with the
workpiece BEFORE pulling the trigger. During
operation, hold the drill firmly and exert moder-
ate, steady pressure. Too much pressure at low
speed will stall the hammer. Too little pressure
160992A8B9 GBH18V-28C 20230316.indd 17
Operating Instructions
Fig. 12
will keep the bit from cutting and cause excess
friction by sliding over the surface. This can be
damaging to the drill and bit.
Shanks of all drill bits should be wiped clean
prior to using and immediately after removing.
Recall these instructions for safe operation:
1. Some materials require slow drilling speeds;
whereas, others require higher speed to pro-
duce the best results.
2. All work must be supported or secured be-
fore drilling and steady, even pressure ap-
plied in line with the drill bit.
3. As the drill bit cuts through the opposite
side, reduce the pressure and continue run-
ning the drill as the bit is withdrawn.
Materials such as glass, porcelain, ceramics,
tiles, plastics, etc., should be drilled at low
speeds with specially designed drill bits and lu-
bricants.
Drilling Masonry
Use carbide-tipped masonry bit for cinder block,
mortar, common brick, soft stone and other ma-
terials. The amount of pressure to be used is de-
pendent upon the type of material being drilled.
Soft materials require less pressure while the
hard materials need more pressure to prevent
the drill bit from spinning.
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3/16/23 4:08 PM
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