Makita 6953 Manuel D'instructions page 5

Installing and removing hook
Expand the upper part of the hook in both directions and
remove it. To install the hook, follow the removal
procedure in reverse.
1
001645
OPERATION
The proper fastening torque may differ depending upon
the kind or size of the bolt, the material of the workpiece
to be fastened, etc. The relation between fastening
torque and fastening time is shown in the figures.
Standard bolt
N·m
(ft·lbs)
140
(100)
120
(86)
100
M14 (9/16")
(72)
80
M12 (1/2")
(58)
60
(43)
40
(29)
20
(14)
0
1 2
Fastening time
001658
1. Hook
2. Expand
2
M16 (5/8")
M16 (5/8")
M14 (9/16")
M12 (1/2")
Seconds
3
High tensile bolt
N·m
(ft·lbs)
140
(100)
120
M12 (1/2")
(86)
100
(72)
M10 (3/8")
80
(58)
60
(43)
M8 (5/16")
40
(29)
20
(14)
0
1
2
Fastening time
001659
NOTE:
When fastening screw M8 (5/16") or smaller,
•
carefully adjust pressure on the switch trigger so
that the screw is not damaged.
Hold the tool pointed straight at the bolt or nut
•
without applying excessive pressure on the tool.
If you fasten the bolt for a time longer than shown
•
in the figures, the bolt or the socket may be
overstressed, damaged, etc. Before starting your
job, always perform a test operation to determine
the proper fastening time for your bolt. Especially
for the bolt over than M8 (5/16"), perform the
above test operation to prevent the trouble on
socket or bolt, etc.
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
Voltage drop will cause a reduction in the
fastening torque.
2. Socket
Failure to 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
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.
5
M12 (1/2")
M10 (3/8")
M8 (5/16")
Seconds
3