Operation The proper fastening torque may differ depending upon the kind or size of the screw, the type of material to be fastened, etc. The relation between fastening torque and fastening time is shown in the figures below. Machine screw
Kg .cm
(ft
. Ibs) 200
(15)
al
3
P
c
p
100
‘E (7)
4-
VI
U
M8x 12
(5/16”
x
1/2”)
Proper fastening torque
for M8 (5/16”)
Proper fastening torque
for M6 (1 /4”)
I

J

Proper fastening torque
for M8 (5/16”)
Proper fastening torque
for M6 (1 /4”)
I
0
0.5 1 Seconds
Fastening time
Standard bolt
0
2
e
Y
P
.-
C
t-
m
v
Kg
.
cm
(ft
. Ibs)
800
(57) T
Proper fastening torque

+/

for
MI 2
(
1
/2”)
Proper fastening torque
for
M10
(3/8”)
Proper fastening torque
for M8 (5/16”)
200
(15)
Proper fastening torque
for M6 (1/4”)
0 1 2
3
Seconds
Fastening time
9