Mechanical properties
3.7 Radial and axial forces
S-1FT7 synchronous motors
Configuration Manual, 09/2018, A5E45099423B AA
55
c ––– 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
R, perm
When using other configurations, you must take into account the actual forces generated
from the torque being transferred.
Point of application of radial forces
F
R
at the shaft extension
● for average operating speeds
● at nominal bearing lifetime of 25000 hours
Distance between the point of application of the force F
R
and the shaft shoulder in mm.
Figure 3-5 Force application point at DE
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