0-21
InTroduCTIon
0.3.4 - Tightening torques
The method used to calculate tightening torques (Cs) and traction forces (F0) is compliant with the standard VDI 2230-1.
The coefficient of safety applied is 0.70 of the yield strength of the material.
Tightening torques for 4.8 unI En Iso 898-1 screws
Table 20
ThrEad
CaTEgorY
nomInal TIghTEnIng TorquEs
µ 0,10 (VI)
µ 0.14 (VII)
µ 0.17 (II)
Cs* nom (nm)
Cs* nom (nm)
Cs* nom (nm)
4x0.70
1
0.9
1.1
1.2
2
0.8
1.0
1.1
3
0.7
0.9
1.0
5x0.80
1
1.8
2.2
2.4
2
1.7
2.0
2.3
3
1.5
1.8
2.0
6x1.00
1
3.0
3.6
4.0
2
2.8
3.4
3.8
3
2.5
3.0
3.3
7x1.00
1
4.9
6.0
6.7
2
4.6
5.6
6.3
3
4.0
5.0
5.6
8x1.00
1
7.8
9.7
10.9
2
7.3
9.1
10.2
3
6.5
8.0
9.0
8x1.25
1
7.3
9.0
10.0
2
6.9
8.4
9.4
3
6.1
7.4
8.3
10x1.00
1
15.9
20.0
22.5
2
14.9
18.7
21.1
3
13.2
16.6
18.6
10x1.25
1
15.2
18.9
21.2
2
14.2
17.7
19.8
3
12.6
15.6
17.5
10x1.50
1
14.4
17.8
19.9
2
13.5
16.7
18.6
3
12.0
14.7
16.4
12X1.25
1
27
34
38
2
25
31
35
3
22
28
31
12x1.50
1
26
32
36
2
24
30
34
3
21
27
30
12x1.75
1
25
31
34
2
23
29
32
3
20
25
28
14x1.50
1
42
53
59
2
40
49
56
3
35
44
49
14x2.00
1
39
49
54
2
37
46
51
3
33
40
45
16x1.50
1
65
82
92
2
61
76
86
3
54
67
76
16x2.00
1
61
76
85
2
57
71
80
3
51
63
70
18x1.50
1
94
119
134
2
88
111
125
3
78
98
111
18x2.50
1
85
105
117
2
79
98
109
3
70
87
97
Содержание R3 EVO 85
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Страница 19: ...0 1 0 Introduction...
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