Motor Description
1.8 Bearing design
1PH7/1-28
Siemens AG, 2004. All rights reserved
Induction Motors, 1PH7 (APH7S) – 05.04 Edition
1.8 Bearing design
Out-drive types and bearing versions
1PH7 induction motors are suitable for coupling and belt out-drives. The bearing
versions and their applications are summarized in Table 1-11.
Table 1-11 Out-drive type with the appropriate bearing version
Applications
Bearing version
Coupling out-drive
Planetary gear
Low cantilever forces
SH 100 to SH 160
Deep-groove ball bearings
Deep-groove ball bearings
SH 180
SH 225
Belt out-drive with normal
cantilever force
Pinion out-drive with
straight teeth
Belt out-drive with
increased cantilever force
Deep-groove ball
bearings
Deep-groove
ball bearings
Deep-groove ball bearings
Cylindrical-roller bearing
SH 180
SH 225
Bearing change intervals (t
LW
) SH 100 to 225
The values specified in Tables 1-12 and 1-13 are valid for the following conditions:
Coupling and belt out-drives
Horizontal mounting
The bearing change intervals are reduced for unfavorable operating conditions,
for example
– Average speed > as specified in Table 1-12
– Vibration and shock load
– Frequent reversing operation
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