G
G
G
G
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SCHEDULED MAINTENANCE
MAINTENANCE
36
Translated by the original
GREASING POINTS
Fig. 6.4.2
TIGHTENING SCREWS OF THE ROTATION THRUST BLOCK
Tightening must be performed exclusively by specialized
technicians with a torque wrench using the torque values
shown in the following table (
Table 6.4.3
).
The screws can only be retightened once and then must
be replaced.
TIGHTENING TORQUES AND TRACTION STRESSES
for nuts and triangular-profile screws with large pitch metric threads as a function of their UNI strength class
UNI 3740
6S
8.8-(8G)
10.9-(10K)
12.9-(12K)
Nominal
diameter
Large pitch
Resistant
section
Tightening
torque
Traction stress on
the screw
Tightening
torque
Traction stress on
the screw
Tightening
torque
Traction stress
on the screw
Tightening
torque
Traction stress on
the screw
d
r
s
(M)
(R)
(M)
(R)
(M)
(R)
(M)
(R)
mm
mm
mm²
Nm
kN
Nm
kN
Nm
kN
Nm
kN
M5
0.8
12.03
5.1
5.3
5.98
6.3
8.5
8.8
10.2
10.6
M6
1
17.3
8.73
7.5
10.3
8.8
14.7
12.4
17.6
14.9
M8
1.25
31.9
21.58
13.7
25.5
16.2
35.3
22.8
42
27.4
M10
1.5
50.9
42.2
21.8
50
25.8
70.6
36.3
85.5
43.6
M12
1.75
74.3
73.6
31.8
87.3
37.7
122.6
52.9
147
63.6
M14
2
102
116.7
43.7
138.3
51.7
194.2
72.7
235.5
87.3
M16
2
141
178.5
60
210.9
71.2
299.2
100
358
120
M18
2.5
171
245
73
289.4
86.5
412
121.6
490.5
146.1
M20
2.5
220
348.5
93.9
412
111.3
578.8
156.5
696.5
187.8
M22
2.5
276
471
117.3
559.2
139.3
784.8
195.7
942
234.5
M24
3
317
598.5
135.4
711.2
160.4
1000.5
225.6
1197
271
M27
3
419
888
178.1
1049.7
210.9
1481
296.3
1776
356
M30
3.5
509
1206.5
215.8
1422.4
256
2011
360
2403
432.6
M33
3.5
636
1628.5
269.8
1932.6
319.8
2717
449.3
3267
539.6
Tab. 6.4.3
Summary of Contents for PDS 030R
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