Operation - Makita 6953 Instruction Manual

Fig.4
Move the O-ring out of the groove in the socket and
remove the pin from the socket. Fit the socket onto
the anvil of the tool so that the hole in the socket is
aligned with the hole in the anvil. Insert the pin
through the hole in the socket and anvil. Then return
the O-ring to the original position in the socket
groove to retain the pin. To remove the socket,
follow the installation procedures in reverse.
Installing and removing hook
Fig.5
The hook is convenient for temporarily hanging the tool.
This can be removed without using a tool. This can be
installed on either side of the tool.
Expand the upper part of the hook in both directions and
remove it. To install the hook, follow the removal
procedure in reverse.

OPERATION

Holding the tool
Fig.6
Hold the tool only by the handle when performing an
operation. Do not touch the metal part.
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
.
(kg cm)
140
(1428)
120
(1224)
100
M14
(1020)
80
M12
(816)
60
(612)
40
(408)
20
(204)
0
1 2
Fastening time
005309
M16
M16
M14
M12
Seconds
3
High tensile bolt
.
N m
.
(kgf cm)
140
(1428)
120
(1224)
100
(1020)
M10
80
(816)
60
(612)
M8
40
(408)
20
(204)
0
1
2
Fastening time
005310
Hold the tool firmly and place the socket over the bolt or
nut. Turn the tool on and fasten for the proper fastening
time.
NOTE:
When fastening screw M8 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.
Excessive fastening torque may damage the
•
bolt/nut or socket. Before starting your job, always
perform a test operation to determine the proper
fastening time for your bolt or nut. Especially for
the bolt smaller than M8, 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.
4. The use of the universal joint or the extension bar
somewhat reduces the fastening force of the
impact wrench. Compensate by fastening for a
5
M12
M12
M10
M8
(S)
3