9 ENGLISH
High tensile bolt
N m
(ft lbs)
40
30
20
10
0
0
1
2
3
M8(5/16")
M6(1/4")
(M8(5/16"))
(M6(1/4"))
(29)
(22)
(15)
(8)
2
1
3
►
1.
Fastening time (second)
2.
Fastening torque
3.
Proper fastening torque corresponding to each
bolt diameter
For cordless angle impact driver
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.
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 reduc-
tion in the fastening torque.
NOTE:
Use the proper bit for the head of the screw/
bolt that you wish to use.
NOTE:
Hold the tool pointed straight at the screw.
NOTE:
If the impact force is too strong or you tighten
the screw for a time longer than shown in the figures,
the screw or the point of the driver bit may be over-
stressed, stripped, damaged, etc. Before starting your
job, always perform a test operation to determine the
proper fastening time for your screw.
For cordless angle impact wrench
Hold the tool firmly and place the impact socket over the bolt or
nut. Turn the tool on and fasten for the proper fastening time.
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.
Impact socket
•
Failure to use the correct size impact socket
will cause a reduction in the fastening torque.
•
A worn impact 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.
6.
Operating the tool at low speed will cause a reduc-
tion in the fastening torque.
NOTE:
Hold the tool pointed straight at the bolt or nut.
NOTE:
Excessive fastening torque may damage the
bolt/nut or impact socket. Before starting your job,
always perform a test operation to determine the
proper fastening time for your bolt or nut.
