C
Tables
Table of screw tightening torques
Maximum tightening MA in Nm
Strength category
8.8
10.9
12.9
Sliding friction coefficient
m
8
0.10
0.15
0.20
0.10
0.15
0.20
0.10
0.15
0.20
M8
20
25
30
30
37
44
35
43
52
M10
40
50
60
59
73
87
69
51
100
M12
69
87
105
100
125
151
120
148
177
M16
170
220
260
250
315
380
290
370
445
M20
340
430
520
490
615
740
570
700
840
M24
590
740
890
840
1050
1250
980
1250
1500
8
µ = 0.10 very good surface, lubricated
µ = 0.15 good surface, lubricated or dry
µ = 0.20 surface is black or phosphate-treated, dry
Table of permissible vibration velocities
According to ISO 14694 (2003), Chapter 8.4
State
Category
Max. vibration velocity,
securely assembled, [mm/s]
Max. vibration velocity, flex-
ibly assembled, [mm/s]
Commissioning
BV-2
5.6
9.0
BV-3
4.5
6.3
BV-4
2.8
4.5
Normal operation
BV-2
5.6 – 9.0
9.0 – 14.0
BV-3
4.5 – 7.1
6.3 – 11.8
BV-4
2.8 – 4.5
4.5 – 7.1
Alarm
BV-2
9.0 – 12.5
14.0 – 17.5
BV-3
7.1 – 9.0
11.8 – 12.5
BV-4
4.5 – 7.1
7.1 – 11.2
Shutdown
BV-2
≥ 12.5
≥ 17.5
BV-3
≥ 9.0
≥ 12.5
BV-4
≥ 7.1
≥ 11.2
Tables
Centrifugal fans REH; RZH; BVREH; BVRA
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