Siemens SINAMICS SH150 - Table 9-3 Tightening Torque for Screws; Table 9-4 Tightening Torques for Screw Terminals for Copper Cables Without Cable Lug 1)

Table 9-3 Tightening torque for screws
Screw type Soft materials S3
1
Hard materials S2
2
Hard materials S1
3
nm in - lb nm in - lb nm in - lb
M3 0.8 7.1 1.8 15.9 1.3 11.5
M4 1.8 15.9 3.9 34.5 3.0 26.6
M5 3.0 26.6 7.8 69.0 6.0 53.1
M6 6.0 53.1 13.0 115 10.0 88.5
M8 13.0 115 32.0 283 25.0 221
M10 25.0 221 65.0 575 50.0 443
M12 50.0 443 115.0 1020 88.0 779
M16 115.0 1020 270.0 2390 215.0 1900
1
Examples of soft materials are Cu, Al, CuZn cable entries, laminate materials, plastics, cast
resin post insulators, press nuts, welding nuts, blind rivet nuts, and cage nuts.
2
Hard materials S2 are materials with friction-enhancing washer components, e.g. a contact
washer.
3
Hard S1 materials include steel, for example.
Table 9-4 Tightening torques for screw terminals for copper cables without cable lug
1)
Screw type Set screws and
headless screws
Head screws with
slit
Head screws with
hexagon profile
nm in - lb nm in - lb nm in - lb
M2 - - -
M2.5 0.25 2.2 0.5 4.4 0.5 4.4
M3 0.3 2.7 0.6 5.3 0.6 5.3
M3.5 0.5 4.4 1.0 8.9 1.0 8.9
M4 0.8 7.1 1.3 11.5 1.3 11.5
M5 1.0 8.6 2.5 22.1 2.5 22.1
M6 1.3 11.5 3.0 26.6 3.5 31.0
M8 1.8 15.9 3.9 34.5 7.2 63.7
M10 - - 4.8 42.5 13 115
M12 - - - - 18 159.3
M16 - - - - 30 265.5
Observe the tightening torques of the terminal manufacturer and the test torques according to
DIN EN 60999-1, VDE 609-1
Maintenance
9.7 Repair
SINAMICS SH150 6SL3805
100 Operating Instructions 05/2020