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 tightening
torque will differ according to the diameter of
bolt.
• Even though the diameters of bolts are the
same, the proper tightening torque will differ
according to the torque coefficient, the class of
bolt and the bolt length.
4. The manner of holding the machine or the mate-
rial of driving position to be tightened will affect the
torque.
5. Operating the machine at low speed will cause a
reduction in the tightening torque.
MAINTENANCE
CAUTION:
Always be sure that the machine is switched off and
the battery cartridge is removed before carrying out
any work on the machine.
To maintain product safety and reliability, repairs,
maintenance or adjustment should be carried out by a
Makita Authorized Service Center.
6903VD (E) (’100. 3. 22)
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