Siemens SIMOTICS M-1PH1 Equipment Manual page 40

Mechanical properties
3.8 Radial and axial forces
NOTICE
Mechanical destruction of the motor
If the motor supports higher forces when force/torque boosting elements are used, the
flange or feet of the motor can be torn off.
• Make sure that the force/torque boosting elements, for example, gearboxes or brakes,
Note
Complying with the belt manufacturer's guidelines
• When dimensioning the radial forces at the shaft extension, make sure that you comply
with the regulations of the belt manufacturers.
• Set the belt tension by means of appropriate measuring instruments.
Calculating the total radial force F
If the belt manufacturer has not provided precise radial force data, the radial force can be
determined approximately via the following formula:
F = c x F
R
Formula ab-
breviations
c
F
U
P
n
D
38
absorb the higher forces. The remedy examples are as follows:
– Choose the correct type of construction.
– Mechanically mount the force/torque boosting elements properly.
for belt couplings
R
F
U U
Unit Description
-- Pre-tensioning factor
The pre-tensioning factor is an experience value provided by the belt
manufacturer. It can be assumed as follows:
•
•
N Circumferential force
kW Motor output
r/min Motor speed
mm Diameter of the belt pulley
= 2 x 10 x P / (n x D)
7
For V belts: c = 1.5 to 2.5
For special plastic belts (flat belts), depending on the load type and
belt type: c = 2.0 to 2.5
Equipment Manual, 09/2021, A5E51077676A-AA
1PH1 main motors