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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 below.
Standard bolt
N
. m
(ft
.
Ibs)
I
(72)
100
a ,
60
.-
g
(43)
20
(14)
0
1.0
2.0
3.0
Fastening time
High
tensile bolt
Proper fastening torque for M I 4 (9/16")
Proper fastening torque for M12 (1/2')
Proper fastening torque for M I 0
(3/8")
Seconds
N . m
(ft
.
Ibs)
120
-
(87)
Proper fastening torque for M12 (1/2")
Proper fastening torque for M I 0
(3/8")
Proper fastening torque for ME (5116")
Seconds
1.0
2.0
3.0
4.0
5.0
Fastening time
12
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