Operation; Maintenance - Makita TW0350 Instruction Manual

To remove the socket, depress the detent pin through
the hole in the socket and pull the socket off the anvil.

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
300
250
(3/4"X3-1/8")
200
M16X80
150
(5/8"X3-1/8")
100
M12X80
(1/2"X3-1/8")
50
0
0.5 1 1.5 2
Fastening time (S)
High tensile bolt
300
250
M16(F10T)
(5/8")
200
150 M12X80
(1/2"X3-1/8")
100
50
0
1 2 3 4
Fastening time (S)
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 M12 (1/2") or smaller, care-
fully adjust pressure on the switch so that the screw
is not damaged.
• Hold the tool pointed straight at the bolt or nut with-
out applying excessive pressure on the tool.
004009
M20X80
3
2.5
004010
M16
(5/8")
M12
(1/2")
5 6
• If you fasten the bolt for a time longer than shown in
the figures, the bolt or the socket may be over-
stressed, 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 M12 (1/2"), perform the above
test operation to prevent the trouble on socket or
bolt, etc.
The fastening torque is affected by a wide variety of fac-
tors 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 longer
period of time.
5. The manner of holding the tool or the material of
driving position to be fastened will affect the torque.

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection
or maintenance.
Replacing carbon brushes
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
5
001145
1. Limit mark
1