Manual for Induction Motors and Generators
Installation and Alignment -
35
3BFP 000 050 R0101 REV E
Table 3-1. Recommended permissible misalignments
3.7 Care after installation
If the machine will not be in operation for a longer period after it has been installed, the same
measures as mentioned above in
Chapter 2.6.1 Short term storage (less than 2 months)
should
be applied. Remember to rotate the shaft 10 revolutions at least every 3 months, and that self-
lubricated bearings must be filled with oil. If external vibration is present, the shaft coupling
should be opened and suitable rubber blocks should be placed under the feet of the machine.
***Following note for bearing type: Rolling bearing
NOTE: External vibration will damage the bearing rolling surfaces and therefore shorter the
bearing lifetime.
***Following note for bearing type: Sleeve bearing
NOTE: External vibration will damage the bearing sliding surfaces and therefore shorter the
bearing lifetime.
Coupling Information
Permissible Misalignment
Coupling
Diameter
Coupling Type
Parallel
∆
r
Angular
∆
b
Axial
∆
a
100 – 250 mm
(4 – 10”)
Rigid Flange
0.02 mm
(0.8 mil)
0.01 mm
(0.4 mil)
0.02 mm
(0.8 mil)
Gear
0.05 mm
(2 mil)
0.03 mm
(1 mil)
0.05 mm
(2 mil)
Flexible
0.10 mm
(4 mil)
0.05 mm
(2 mil)
0.10 mm
(4 mil)
250 – 500 mm
(10 – 20”)
Rigid Flange
0.02 mm
(0.8 mil)
0.02 mm
(0.8 mil)
0.02 mm
(0.8 mil)
Gear
0.05 mm
(2 mil)
0.05 mm
(2 mil)
0.05 mm
(2 mil)
Flexible
0.10 mm
(4 mil)
0.10 mm
(4 mil)
0.10 mm
(4 mil)
