Mounting and options
3.3 Bearing version
SIMOTICS S-1FT2 synchronous motors for SINAMICS S120
34
Operating Instructions, 07/2021, A5E50610821B AB
3.3
Bearing version
The 1FT2 motors have deep-groove ball bearings with life grease lubrication.
3.4
Permissible radial and axial forces
3.4.1
Axial forces
When using, for example, helical toothed wheels as drive element, in addition to the radial
force, there is also an axial force on the motor bearings.
The following axial forces on the shaft extension are permitted.
Motor
Static axial forces in N
1FT2☐03
75
1FT2☐04
100
1FT2☐05
120
1FT2☐06
200
1FT2☐08
300
1FT2210
450
The specified axial forces are determined by the spring loading and therefore also apply to motors with
holding brake.
Note
Applications with an angular toothed pinion directly on the motor shaft are not permitted in
case the permissible axial forces are exceeded.
3.4.2
Radial forces
As a result of the bearing arrangement, 1FT2 is designed for aligned forces. Forces such as
these occur for belt drives, for example.
All radial forces always refer to aligned forces.
NOTICE
Motor damage caused by circulating forces
Circulating forces can cause bearing motion, and therefore damage the motor.
•
Circulating forces are not permissible.
