Transport, installation and assembly
3.4 Aligning
A5E01083943A AB
44 Siemens AG Operating Instructions 2.02 1FW4
Alignment accuracy
The coaxial characteristic of the shafts of the motor and driven machine may not be more
than 0.05 mm. Align the motors with coupling output in such a manner that the center lines of
the shafts are parallel with no offset. This ensures that no additional forces affect their
bearings during operation. The balance condition of the shaft (full-key or half-key balancing)
and alignment errors primarily affect the service life of the bearing, especially under high
motor speeds or when using rigid couplings. Perform the fine adjustments with plates under
the entire motor foot.
KR
H
K
ෙK KKR
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(1) Plates placed under the motor for
alignment
(2) Read alignment
Figure 3-1 Aligning the motor
Table 3-1 Permissible deviations
Permissible deviation for Radial shaft offset [e] Axial shaft offset [Δh]
Rigid coupling 0.03 mm 0.02 mm
Flexible coupling 0.05 mm 0.05 mm
[ID 845.01]
See also
SIEMENS Service Center (Page 23)
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