Impact Driver User Manual

Hold the tool firmly and place the point of the driver bit in the screw head. Apply for-
ward pressure to the tool to
the extent that the bit will not slip off the screw and turn the
tool on to start operation.
NOTE
:
Use the proper bit for the head of the screw that you wish to use.
Hold the tool pointed straight at the screw.
If you tighten the screw for a time longer than shown in the figures above, the screw or
the point of the driver bit may be overstressed, stripped, damaged, etc. Before starting
your job, always perform
a test operation to determine the proper tightening time for
your screw. When tightening
a standard screw in a steel plate, the proper tightening
torque can be obtained in an extremely short time (approx.
0.1 -- 0.2 seconds). Turn
the tool off
as soon as the impact sound is heard.
The tightening torque
is affected by a wide variety of factors including the following.
After tightening, always check the torque with
a torque wrench.
1. When the battery cartridge is discharged almost completely, voltage will drop and the
tightening torque will
be reduced.
2. Driver bit or socket bit
*Failure to use the correct
size driver bit or socket bit will cause a reduction in the
tightening torque.
3. Bolt
Even though the torque coefficient and the class of bolt are the same, the proper
*Even though the diameters of bolts are the same, the proper tightening torque will
4. The manner of holding the tool or the material of driving position to be tightened will
tightening torque will differ according to the diameter of bolt.
differ according to the torque coefficient, the
class of bolt and the bolt length.
affect the torque.
CAUTION
:
If the tool is operated continuously until the battery cartridge has discharged, allow the
tool to rest for
15 minutes before proceeding with a fresh battery.
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