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MKE Synchronous Servomotors
Features and functions
Bosch Rexroth AG
R911414374, Edition 01
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
conditions.
•
Horizontal installation
•
Low vibration and impact loads
•
No oscillating bearing movement < 180°
•
Mean speed according to the following table
Table 11: Mean speed - basis of calculated grease
service life
Type
Mean speed
MKE037
≤ 3,500 1/min
MKE047
≤ 3,500 1/min
MKE098
≤ 3,000 1/min
MKE118
≤ 2,000 1/min
The following standard values apply under the
specified preconditions:
L
10h
= 30.000 h, in case of utilization after
S1-60K and max. load factor 95% 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. 4: Point of action of radial force F
R
and axial
force F
A
The axial force values are the minimum per-
missible 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
6.2.11 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 60034-7:1993 +
A1:2001)
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
IM V3 / IM 3031
Flange attachment on
the drive side of
the flange, drive side
facing up
