Maintenance
73
Tightening
torques
All screwed joints on this machine must be torqued in accordance with
the values given in this table below unless indicated otherwise.
On this machine, 8.8 is both standard and minimum quality used. If not
indicated anyhow use this quality for determination of torque (in most
cases the quality can be found on the head of the respective bolt).
* Values in brackets = spanner size of lock bolts and nuts with toothed
flange are given in brackets if different from standard.
T
IP
•
The listed values are applicable for dry or slightly oiled joints
•
Do not use plated bolts/screws/nuts without grease
•
When a stiff grease is applied decrease the given value by 10%
•
In case lock nuts, lock screws or lock bolts are used increase the
given value by 10%
Thread
Torque value
Spanner
size*
8.8
10.9
12.9
Nm
mm
M3
1.3
1.8
2.1
6
M4
2.9
4.1
1.9
7
M5
5.7
8.1
9.7
8
M6
9.9
14
17
10
M8
24
34
41
13
M10
48
68
81
17 (15)
M12
85
120
145
19 (17)
M14
135
190
225
22 (19)
M16
210
290
350
24 (22)
M18
290
400
480
27
M20
400
570
680
30
M20 x 1.5
-
640
-
30
M22
550
770
920
32
M24
700
980
1180
36
M27
1040
1460
1750
41
M30
1410
1980
2350
46
M33
1910
2700
3200
50
M36
2450
2546
3063
55
M39
3200
4500
5400
60
Summary of Contents for 7420
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