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OPERATION
014066
The proper fastening torque may differ depending upon
the kind or size of the screw/bolt, the material of the
workpiece to be fastened, etc. The relation between
fastening torque and fastening time is shown in the
figures.
N.m
Standard bolt
(ft.lbs)
120
(87)
100
(72)
80
(58)
M12
60
(43)
(3/8")
40
M10
(29)
20
(5/16")
M8
(14)
0
1.0
2.0
Fastening time
009220
N.m
High tensile bolt
(ft.lbs)
120
(87)
M12
(1/2")
100
(72)
M10
(3/8")
80
(58)
60
(43)
(5/16")
M8
40
(29)
20
(14)
0
1.0
2.0
Fastening time
009221
M14
(9/16")
(1/2")
(M14)
(9/16")
(M12)
(1/2")
(M10)
(3/8")
(M8)
(5/16")
3.0
(S)
(M12)
(1/2")
(M10)
(3/8")
(M8)
(5/16")
(S)
3.0
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:
Use the proper bit for the head of the screw/bolt
•
that you wish to use.
When fastening screw M8 or smaller, choose a proper
•
hammer force and carefully adjust pressure on the
switch trigger so that the screw is not damaged.
Hold the tool pointed straight at the screw.
•
If the hammering force is too strong 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.
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.
3.
Bolt
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.
4.
The manner of holding the tool or the material of
driving position to be fastened will affect the torque.
5.
Operating the tool at low speed will cause a
reduction in the fastening torque.
MAINTENANCE
CAUTION:
Always be sure that the tool is switched off and the
•
battery cartridge is removed before attempting to
perform inspection or maintenance except for the
following troubleshooting related to the light.
Cleaning
From time to time wipe off the outside (tool body) of the
tool using a cloth dampened in soapy water.
CAUTION:
Never use gasoline, benzine, thinner, alcohol or the
•
like. Discoloration, deformation or cracks may result.
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