Operation; Maintenance - Makita TW0350 Instruction Manual

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
200
150
100
50
0
0.5
Fastening time (S)
High tensile bolt
300
250
M16(F10T)
(5/8")
200
150
100
50
0
1
Fastening time (S)
M20X80
(3/4"X3-1/8")
M16X80
(5/8"X3-1/8")
M12X80
(1/2"X3-1/8")
1 2 3
1.5 2.5
M16
(5/8")
M12X80
(1/2"X3-1/8")
M12
(1/2")
2 3 4 5 6
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,
carefully adjust pressure on the switch 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 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
factors including the following. After fastening, always
check the torque with a torque wrench.
1. Voltage
Voltage drop will cause a reduction in the fasten-
ing 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 fasten-
ing torque will differ according to the diame-
ter 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 inspec-
tion or maintenance.
• Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.
5 ENGLISH