Advertisement
DOK-MOTOR*-MSK*EXGIIK3-PR09-EN-P
Synchronous Servomotors MSK For Potentially Explosive Areas
10.7
Bearing and shaft load
10.7.1
Radial load, axial load
Maximum allowed radial force
Permissible radial force
Permissible axial force
Average speed
During operation, radial and axial forces act on the motor shaft and the motor
bearings. The design of the machine, the selected motor type and the shaft-
side mounting of drive elements must be coordinated to ensure that the
specified load limits are not exceeded.
x
Point of application of force
Fig. 10-6:
Example diagram of shaft load
The maximum permissible radial force F
factors
●
Shaft breaking load
●
Force action point x
●
Shaft plain or with keyway
The permissible radial load F
●
Arithmetically averaged speed (n
●
Force action point x
●
Bearing service life
The maximum permissible axial force F
shown in the following table.
F
[N]
Motor
axial
MSK030
0
MSK04x
30
MSK050
40
MSK060
40
MSK061
40
Tab. 10-7:
Maximum permissible axial force F
Axial forces are permissible without restriction up to the specified values.
Larger axial forces may be possible after detailed examination by your
Rexroth sales partner. Specify the following information for the valuation:
●
Axial and radial force with force application point
●
Installation position (horizontal, vertical with the shaft end pointing to the
top or bottom)
●
Average speed
Run-up and braking times can be omitted from the calculation if the time dur‐
ing which the drive is operated at constant speed is considerably longer than
the acceleration and braking times. In the exact calculation of the average
speed according to the following pattern, acceleration and braking times are
taken into account.
Bosch Rexroth AG
Operating conditions and application notes
depends on the following
radial_max
depends on the following factors
radial
)
average
for the individual motor sizes is
axial
Motor
MSK070
MSK071
MSK076
MSK100
MSK101
axial
125/175
F
[N]
axial
60
60
60
80
80
Advertisement
