Bearing service life
The bearing lifetime is an important criterion for the availability of motors. The
operating conditions influence the bearing service life L
10h
considerably.
The following boundary conditions apply to the bearing service life L
10h
:
● Operation within the specified permissible loads (radial and axial force)
● Operation within the permissible ambient conditions (temperature range
0 … 40 °C, vibration, ... )
● Operation within the thermally permissible operating characteristic curve
The bearing lifetime also depends on the service life of the grease. A calculated
grease service life was used for the mentioned specifications, taking into consid-
eration the following boundary conditions.
● Horizontal installation
● Low vibration and impact loads
● No oscillating bearing movement < 180°
● Mean speed according to Table 4-14:
Type Mean speed
MS2N03, -04, -05, -06 ≤ 3500 1/min
MS2N07 ≤ 3000 1/min
MS2N10 ≤ 2000 1/min
MS2N13 ≤ 1800 1/min
Tab. 4-14: Mean speed - basis of calculated grease service life
The following standard values apply under the specified preconditions for the
60K and 100 K operation modes:
L
10h
in case of operation after S1-60K
L
10h
= 30.000 h, in case of utilization after S1-60K and max. load factor 95% dur-
ing the runtime.
L
10h
in case of operation after S1-100K
L
10h
= 20.000 h, in case of utilization after S1-100K and max. load factor 90%
during the runtime.
When exceeding or not complying with these conditions, a reduced
service life is to be expected.
Explanation of radial and axial force
During operation, both radial and axial forces act upon the motor shaft and the
motor bearing. The permissible radial force F
R
in distance x from the shaft shoul-
der and the mean speed is specified in the radial force diagrams.
MS2N Synchronous Servomotors
33/101
About this product
R911347581_Edition 04 Bosch Rexroth AG
To Next Page
Loading...
