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Torque limiter
The torque limiter will actuate when a certain torque level is reached. The motor will
disengage from the output shaft. When this happens, the bit will stop turning.
CAUTIO
N :
As soon as the torque limiter actuates, switch off the tool immediately. This will help
prevent premature wear of the tool.
Hole saws, core bits, diamond core bits, etc. cannot be used w i t h this tool. They tend
to pinch or catch easily in the hole. This will cause the torque limiter t o actuate too
frequently.
Hammer drilling operation
Position the bit at the desired location for the hole, then pull the trigger. Do not force the
tool. Light pressure gives best results. Keep the tool in position and prevent it from slipping
away from the hole.
Do
not apply more pressure when the hole becomes clogged with chips
or particles. Instead, run the tool at an idle, then remove the bit partially from the hole. By
repeating this several times, the hole will be cleaned out and normal drilling may be resumed.
CAUTIO N:
There is a tremendous and sudden twisting force exerted on the tool/bit at the time of hole
breakthrough, when the hole becomes clogged w i t h chips and particles, or when striking
reinforcing rods embedded in the concrete. Always use the side grip (auxiliary handle) and
firmly hold the tool by both side grip and switch handle during operations. Failure to do
so may result in the loss of control of the tool and potentially severe injury.
Bit grease
Coat the bit shank head beforehand w i t h a small amount (about 0.5
-
1 g;
0.02
-
0.04
oz.) of bit grease. This chuck lubrication assures smooth action and longer service life.
Using the cold chisel or bull point
When using optional cold chisel or bull point, proceed as follows.
1. Unplug the tool.
2. Remove the side grip from the tool.
3.
Set the action mode changing knob to "rotation w i t h hammering".
4. Install the chisel on the tool. Refer to "installing or removing the drill bit" described on
5. Install the chisel adapter (optional accessory) on the tool
so that the chisel is inserted
the previous page.
through the chisel adapter.
I
1
I
Chisel adapter
Chisel
I
\
Clamp screw
I
12
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