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Operating Conditions
3.3.2
Shaft strain
The endurance strength of the shaft and the lifetime of the bearing determine the permissible lateral force FRm
at the D (rive-End) -side shaft end
F
Rm
d
1
F
Am
3.3.3
Output component
The minimum effective pulley diameter of the driving element is calculated as follows:
k • 2 • M
D
=
–––––––
W
F
Rm
3.3.4
Preloading factor
Empirical values for the preloading factor k:
approx. k = 1.5
approx. k = 1.2 to 2.0
approx. k = 2.2 to 3.0
For dynamic processes like braking and accelerating, the permissible radial force F
to avoid a mechanical destruction of the motor.
GB - 18
.
F
F
R2
L/2
F
Rm
L
D
:
Effective pulley diameter of the driving element
W
k:
preloading factor
b
F
: permissible radial force
Rm
M
:
acceleration torque of the drive
b
for pinion
for toothed belt
for flat belt
F
= 0,35 • F
Am
R1
n
2
F
F
Am
Rm
n
1
F
A2
A1
is not to be exceeded in order
R
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