Makita 6916D Instruction Manual page 12

Hold the tool firmly and place the point of the driver bit in the screw head. Apply forward
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:
When fastening screw M8 or smaller, carefully adjust pressure
on
the switch trigger so
Hold the tool pointed straight at the screw.
If you tighten the screw for a time longer than shown in the figures, 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 fastening time for your
screw.
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
fastening 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
fastening torque.
Even though the torque coefficient and the class of bolt are the same, the proper fas-
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.
3. Bolt
tening 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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