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DOK-MOTOR*-MSK********-PR12-EN-P
Synchronous Servomotors MSK
9.8
Bearing lifetime
Bearing lifetime with increased ra‐
dial force
The bearing lifetime for MSK motors for operation within the specified limits
for radial and axial load and for ambient conditions is:
L
= 30000 h (calculation acc. to ISO 281, edition 12/1990)
10h
Different loads may have the following effects:
●
Premature failure of the bearing due to increased wear or mechanical
damage.
●
Reduction of the grease lifetime leads to premature failure of the bear‐
ing.
Calculation of mechanical bearing lifetime at increased radial force:
L
Bearing service life (according to ISO 281, Version 12/1990)
10h
F
Determined allowed radial force in N (newton)
radial
F
Actually acting radial force in N (newton)
radial_act
Fig. 9-11:
Calculation of bearing lifetime L10h at increased radial force:
The actually acting radial force F
the maximum allowed radial force F
Bosch Rexroth AG
Operating conditions and application notes
may never be higher than
radial_act
.
radial_max
219/279
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