Product Specifications; Fastener Torque Ratings; General Torque Tightening Values - Danfoss VLT FC Series Service Manual

Product Specifications

14 Product Specifications

14.1 Fastener Torque Ratings

14.1.1 General Torque Tightening Values

Use a torque wrench to ensure that correct torque is
applied. Incorrect torque can cause electrical connection
problems. For fastening hardware described in this guide,
use the values listed in Table 14.1 to Table 14.3.
NOTICE
TORQUE VALUES
The torque values in the following tables are not
intended for SCR, diode, or IGBT fasteners. Refer to the
instructions included with those replacement parts for
correct values.
Shaft Torx/hex
size drives size Nm (in-lb)
M4 T20/7 mm
M5 T25/8 mm
M6 T30/10 mm
M8 T40/13 mm
M10 T50/17 mm
M12 –/18 mm or
19 mm
Table 14.1 Torque Values Standard Thread
Shaft Torx drives
size size Nm (in-lb)
M4.8 T25
M5 T25
Table 14.2 Torque Values for Thread-cutting into Metal
Shaft Torx drives
size size Nm (in-lb)
M4 T20
M5 T25
Table 14.3 Torque Values for Thread-forming into Plastic
Class A: Clamping metal
Class B: Clamping PCA or plastic
MG94A502
Service Guide
Class A Class B
Nm (in-lb)
1.2 (10) 0.8 (7)
2.3 (20) 1.2 (10)
3.9 (35) 2.3 (20)
9.6 (85) 3.9 (35)
19.1 (169) 9.6 (85)
37.9 (335) –
Class A Class B
Nm (in-lb)
5.7 (50) 3.1 (27)
1.7 (15) 1.7 (15)
Class A Class B
Nm (in-lb)
2.8 (24) 2.8 (24)
5.1 (45) 4.0 (35)
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