6.2 Torques
Tighten all screw connections, for which no tightening torque or no pretension force is
specified in drawings or Assembly Instructions, according to VDI 2230.
Exceptions to this rule are all connections with screws that are not screw connections in
the real sense. This includes hose clips, cable glands, screw fittings, gas connections,
screws for circuit boards etc. Tighten these screw fittings as evenly as possible with a
much lower torque (hose clips 1 Nm, other screw fittings according to manufacturer
specifications).
Select the next lowest torque valid for the screw for mixed materials and special screws
such as relieved screws.
The friction coefficient serving as basis is (screw fitting without lubrication)
µk=µG=0.14. The calculated values are valid for room temperature (T=20°C).
Table 13: Torques
Dimension Slope P Tightening torque M
A
(Nm) according to strength class (see screw
head)
3.6 4.6
A2-50
A4-50
5.6
Alu
A2-70
A4-70
A2-80
A4-80
8.8
Titan
10.9 12.9
M 1.6 0.4 0.05 0.05 0.05 0.11 0.16 0.19 0.26 0.31
M 2 0.45 0.1 0.1 0.11 0.22 0.32 0.39 0.55 0.66
M 2.5 0.45 0.21 0.22 0.23 0.46 0.67 0.81 1.13 1.36
M 3 0.5 0.54 1 1.2 1.39 1.51 1.98 2.37
M 3.5 0.6 0.85 1.3 1.54 1.75 1.9 2.6 3.2
M 4 0.7 1.02 2 2.5 3 3.3 4.8 5.6
M 5 0.8 2 2.7 4.2 5.6 6.5 9.5 11.2
M 6 1 3.5 4.6 7.3 9.7 11.3 16.5 19.3
M 8 1.25 8.4 11 17.5 23.3 27.3 40.1 46.9
M 10 1.5 17 22 35 47 54 79 93
M 12 1.75 29 39 60 79 93 137 160
M14 2 46 62 94 126 148 218 255
M 16 2 71 95 144 192 230 338 395
M 18 2.5 97 130 199 266 329 469 549
M 20 2.5 138 184 281 374 464 661 773
M 22 2.5 186 250 376 508 634 904 1057
M 24 3 235 315 485 645 798 1136 1329
M 27 3 350 470 708 947 1176 1674 1959
M 30 3.5 475 635 969 1289 1597 2274 2662
M 33 3.5 645 865 1319 1746 2161 3078 3601
M 36 4 1080 1440 1908 2350 2778 3957 4631
M 39 4 1330 1780 2416 3016 3597 5123 5994
6 TECHNICAL DATA
20
A D D E N D U M T O O P E R A T I N G I N S T R U C T I O N S | MARSIC300 8026470/AE00/V1-0/2021-04 | SICK
Subject to change without notice
To Next Page
Loading...
Need help?
General
