Makita 6905H Instructions Manual page 7

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.
Voltage
2. Socket
Voltage drop will cause a reduction in the fastening rorque.
Failure t o 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
fastening 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
4. The use of the universal joint or the extension bar somewhat reduces the fastening
5. The type of materials t o be fastened and the manner of holding the tool will affect
fastening torque will differ according to the diameter of the bolt.
differ according t o the torque coefficent, the class of bolt and the bolt length.
force of the impact wrench. Compensate by fastening for a longer period of time.
the torque.
MAINTENANCE
CAUTION :
Always be sure that the tool i s switched off and unplugged before attempting t o perform
inspection or maintenance.
To maintain product SAFETY and RELIABILITY, repairs, carbon brush inspection and
replacement, any other maintenance or adjustment should be performed by Makita
Authorized or Factory Service Centers, always using Makita replacement parts.
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