Publicité
Les langues disponibles
Les langues disponibles
EY7550
M10 x 35 mm M12, M14, M16 x 45 mm
N
m
(kgf-cm)
196.0
(2000)
147.0
(1500)
98.0
(1000)
49.0
(500)
M10
0.0
0.0
0.5
Tightening time (Sec.)
M8, M10 x 35 mm. M12 x 45 mm
N
m
(kgf-cm)
196.0
(2000)
147.0
(1500)
98.0
(1000)
49.0
(500)
0.0
0.0
0.5
Tightening time (Sec.)
EY7551
M10 x 35 mm M12, M14, M16 x 45 mm
N
m
(kgf-cm)
245.0
(2500)
196.0
(2000)
147.0
(1500)
98.0
(1000)
49.0
(500)
0.0
0.0
0.5
Tightening time (Sec.)
EY7546_EY7547_EY7550_EY7551_US.indb 13
Standard bolt
M16
M14
M12
1.0
1.5
2.0
2.5
3.0
High tensile bolt
M12
M10
M8
1.0
1.5
2.0
2.5
3.0
Standard bolt
M16
M14
M12
M10
1.0
1.5
2.0
2.5
3.0
M8, M10 x 35 mm. M12 x 45 mm
N
m
(kgf-cm)
196.0
(2000)
147.0
(1500)
98.0
(1000)
49.0
(500)
0.0
0.0
0.5
Tightening time (Sec.)
Bolt
Nut
Tightening conditions
• The following bolts are used.
Standard bolts: Strength type 4.8
High tensile type 12.9
Explanation of the strength type
4.8
Bolt yield point
80
(
32
Bolt tensile strength
40
2) Tightening time
Longer tightening time results in increased
tightening torque. Excessive tightening,
how ever, adds no value and reduces the
life of the tool.
3) Different bolt diameters
The size of the bolt diameter affects the
tight ening torque.
Generally, as the bolt diameter increases,
tightening torque rises.
4) Tightening conditions
Tightening torque will vary, even with the
same bolt, according to grade, length, and
torque coefficient (the fixed coefficient indi-
cated by the manufacturer upon produc-
tion).
Tightening torque will vary, even with
the same bolting material (e.g. steel),
accord ing to the surface finish.
Torque is greatly reduced when the bolt
and nut start turning together.
- 13 -
High tensile bolt
M12
M10
M8
1.0
1.5
2.0
2.5
3.0
Washer
Steel plate
thickness 10 mm (3/8")
Washer
Spring washer
% of tensile strength)
kgf/mm
2
(45000 psi)
kgf/mm
2
(56000 psi)
2011-2-17 13:36:16
Publicité
