Axial Force - Siemens SIMOTICS M 1PH8 Configuration Manual

4.7.2

Axial force

The axial force acting on the locating bearings comprises the following components:
- Axial force in operation
•
forces through the tool)
• Axial forces from the coolant pressure of the coolant fed through the rotating union
- Force due to spring loading of the bearing
- Where applicable, force exerted by the rotor weight when the motor is vertically
mounted
This results in a maximum axial force that is a function of the direction.
Axial force due to effective hydraulic diameter of the rotating union
Pay attention to the axial force due to the effective hydraulic diameter (area) of the rotating
union.
Force = A x
• Force = F [N]
• A
• p
1 bar = 10
For axial forces in the direction of the motor, the spring-loading of the bearings can be
overcome so that the rotor moves in accordance with the axial bearing play (up to 0.2mm).
The permissible axial force F
When, for example, helical toothed wheels are used as the drive element, an axial force is
exerted on the motor bearings in addition to the radial force. For axial forces in the direction
of the motor, the spring-loading of the bearing can be overcome. This must be prevented as
otherwise it could reduce the bearing and encoder service life.
The permissible axial force F
table "Calculating the permissible axial force").
1PH8 SIMOTICS M main motors
Configuration Manual, 12/2022, A5E51895839A
Axial forces acting externally on the motor (e.g. gearbox with helical gearing, machining
CAUTION
p
= area [m²]
= coolant pressure [N/m²]
N/m²
5
in operation depends on the motor mounting position.
AZ
in operation depends on the motor mounting position (see
AZ
Mechanical properties
4.7 Radial and axial forces
113