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Hold the tool firmly and place the socket over the bolt or nut. Turn the tool on and fasten
for the proper fastening time.
NOTE:
When fastening screw
M8
or smaller, carefully adjust pressure on the switch trigger
so
Hold the tool pointed straight at the bolt.
* I f
you fasten the bolt for a time longer than shown in the figures, the bolt or the
socket may be overstressed, damaged, etc. Before starting your job, always perform a
test operation to determine the proper fastening time for your bolt. Especially for the bolt
other than M8 (5/16"). perform the above test operation to prevent the trouble on socket
or bolt, etc.
that the screw is not damaged.
The fastening torque is affected by a wide variety of factors including the following. After
fastening, always check the torque with a torque wrench.
1. When the battery cartridge is discharged almost completely, voltage will drop and the
2. Socket
fastening torque will be reduced.
Failure to use the correct size socket will cause a reduction in the fastening torque.
A worn socket (wear on the hex end or square end) will cause a reduction in the fas-
tening 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 fastening torque will dif-
4. The manner of holding the tool or the material of driving position to be fastened will
5. Operating the tool at low speed will cause a reduction in the fastening torque.
fastening torque will differ according to the diameter of bolt.
fer according to the torque coefficient, the class of bolt and the bolt length.
affect the torque.
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