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Formula abbrevia-
tions
c
d
R
F
R, perm
When using other configurations, you must take into account the actual forces generated
from the torque being transferred.
3.7.2
Radial force loading
Point of application of radial forces
● for average operating speeds
● at nominal bearing lifetime of 25000 hours
F
x
Figure 3-5
S-1FT7 synchronous motors
Configuration Manual, 09/2018, A5E45099423B AA
Unit
–––
m
N
Radial force
R
Distance between the point of application of the force F
Force application point at DE
Description
Pre-tensioning factor; this factor is an empirical value provided
by the belt manufacturer. It can be assumed as follows:
for toothed belts: c = 1.5 to 2.2
for flat belts c = 2.2 to 3.0
Effective diameter of the belt pulley
Permissible radial force
F
at the shaft extension
R
Mechanical properties
3.7 Radial and axial forces
and the shaft shoulder in mm.
R
55
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