Operation - Makita 6935FD Instruction Manual

OPERATION

Standard bolt
.
N m
(Kgf.cm)
M14
80
(1020)
M12
60
(612)
40
M10
(408)
M8
20
(204)
0 1.0 2.0
Fastening time
.
N m High tensile bolt
(Kgf.cm)
M12
120
(1224)
100
(1020)
80
(1020)
60
(612)
M8
40
(408)
20
(204)
0 1.0 2.0
Fastening time
When the hook is installed on the right side of the tool in back view, place the
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tool upside down with the hook facing up.
The proper fastening torque may differ depending upon the kind or size of the
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screw/bolt, the material of the workpiece to be fastened, etc. The relation
between fastening torque and fastening time is shown in the figures.
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:
(M14)
• Use the proper bit for the head of the screw/bolt that you wish to use.
• When fastening screw M8 or smaller, carefully adjust pressure on the
switch trigger so that the screw is not damaged.
(M12)
• Hold the tool pointed straight at the screw.
(M10)
• 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,
(M8)
damaged, etc. Before starting your job, always perform a test operation
to determine the proper fastening time for your screw.
3.0
The fastening torque is affected by a wide variety of factors including the fol-
lowing. After fastening, always check the torque with a torque wrench.
1. When the battery cartridge is discharged almost completely, voltage will
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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 reduc-
tion in the fastening torque.
(M12)
3. Bolt
•
M10
•
(M10)
4. The manner of holding the tool or the material of driving position to be
fastened will affect the torque.
(M8)
5. Operating the tool at low speed will cause a reduction in the fastening
torque.
3.0
Even though the torque coefficient and the class of bolt are the
same, the proper fastening torque will differ according to the
diameter of bolt.
Even though the diameters of bolts are the same, the proper
fastening torque will differ according to the torque coefficient, the
class of bolt and the bolt length.
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