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Operation
The proper tightening torque may differ depending upon the kind or size of the screw,
the material of the workpiece to be tightened, etc. The relation between tightening
torque and tightening time is shown in the figures below.
+
( 4 )
0
Machine screw
for M6 (1/4")
Proper tightening torque
for M5 ( 3 / 1 6 " )
1
I
0 5
1
seconds
Kg
.
cm
Ift
.
lbsl
Standard bolt
Kg
.
cm
( f t
.
Ibs)
500
-
( 3 6 )
M10
( 3 / 8 " )
M8
(5/16"1
Proper tightenlng torque
for M10 ( 3 / 8 " )
Proper tightening torque
for M8 (5116")
Proper tightening torque
for
M6
(1/4")
1
0
1
2
seconds
Tightening time
8
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