PRODEM PDS Series Operating Instructions Manual page 36

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