PANDROL CD100, User And Maintenance Manual

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USER AND MAINTENANCE MANUAL I ENG_OMM_CD100_P07 I 2022-10-19
@Pandrol 2022
11. Mounting Torque For Screws And Nuts
The preload force must be maintained at a level where the tensile stress and the intensity of the torsional
stress do not exceed the screws yield stress for the specific material. Its main function is to clamp together
the assembled parts and produce friction force between the assembled parts.
At Pandrol AB we mainly use steel screws and nuts. The table below shows the nominal tightening torque in
Nm for the screws and nuts that are used
These torques do not apply to wheel bearings!
Thread diameter Tightening Tourque (per bolt grade) [Nm]
[mm] 8.8 10.9 12.9
5 5,7 8,1 9,7
6 9,8 14 17
8 24 33 40
10 47 65 79
12 81 114 136
14 128 181 217
16 197 277 333
18 275 386 463
20 385 541 649
22 518 728 874
24 665 935 1120
27 961 1350 1620
30 1310 1840 2210
33 1770 2480 2980
36 2280 3210 3850
Ì
IMPORTANT Check that all bolts and nuts are tightened at least every 8 hours
until 80 hours have been reached. If necessary, use spanner to tighten.