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MS2S
Features and functions
Bosch Rexroth AG
R911410077, Edition 01
Bearing service life
The bearing lifetime is an important criterion for
the availability of motors. The operating condi-
tions influence the bearing service life L
10h
con-
siderably.
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, and so on).
•
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 consideration the following boundary condi-
tions.
•
Horizontal installation
•
Low vibration and impact loads
•
No oscillating bearing movement < 180°
•
Mean speed according to
speed - basis of calculated grease service
:
Table 9: Mean speed - basis of calculated grease
service life
Type
Mean speed
MS2S03, -04, -05
≤ 3500 1/min
The following standard values apply under the
specified preconditions for the 60K and 100K
operation modes:
L
10h
during operation
L
10h
= 20.000 h, in case of utilization with max.
load factor 90% during the runtime.
Remark:
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 shoulder and the mean speed is specified in
the radial force diagrams.
Fig. 3: Point of action of radial force F
R
and axial
force F
A
The axial force values are the minimum permis-
sible axial forces F
A
without limitations. A
detailed dimensioning is only possible if more
boundary conditions are known:
•
Occurring radial force and axial force with
force application point
•
Installation position (horizontal, vertical with
the shaft end pointing to the top or bottom)
•
Mean speed
For radial force diagrams, refer to the technical
data
5.2.11 Frame size, installation type
The motors can be installed horizontally and ver-
tically with the shaft end pointing to the top or
bottom. The mounting variants comply with the
IM code according to EN 60034-7 for design and
installation type.
Code I / Code II (EN 60034-7)
IM B5 / IM
3001
Flange attachment on the
drive side of the flange
IM V1 / IM
3011
Flange attachment on the
drive side of the flange,
drive side facing down
About this pr
oduct
