9.5.1
Torques
Table 9-1
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 9-2
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
Note
A different torque of 8 - 10 Nm is applicable for the M8 screw connection for the Power Card.
Maintenance
9.5 Repair
SINAMICS SM150 6SL3810-7NN38-0AA1
156
Operating Instructions Rev.201910281406 EXAMPLE
