SIEMENS
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Siemens D 83.1 · 2016
1
Introduction
General technical specifications
Grease lifetime, relubrication intervals, grease quantities
■
Overview
(continued)
Reinforced bearings
The specified relubrication intervals are valid for maximum
ambient temperatures of 40 °C.
For every 10 °C increase in temperature, the lubrication interval
is reduced by a factor of 0.7 of the value in the table (max. 20 °C
= factor 0.5). Times for operation on 60-Hz systems on request.
Special aspects of grease lifetime
For VARIO types in vertical types of construction, angular-
contact ball bearings or combined bearings are sometimes
installed at NDE. This reduces the grease lifetime for the
NDE bearings.
At an ambient temperature of
25 °C, the grease lifetime can be
expected to be doubled. Due to the durability of the grease in
years, it is limited to a maximum of 40000 h.
The grease lifetime or relubrication interval must be regarded
independently of the mechanical service life of the bearing.
In coupling operation with an elastic coupling, for example,
the calculated mechanical service life of the bearing is
L
10h
= 50000 h. The grease lifetime for permanently lubricated
bearings is, however, limited to 40000 h. Relubrication must be
performed within the specified intervals.
The intervals for operation on 60-Hz systems are available on
request. They can be estimated for higher speeds by means of
the following rule.
At speeds above the rated speed on 50-Hz systems, the grease
lifetime and relubrication intervals are reduced. With reference to
the time
t
f50
at 50 Hz, the reductions are as shown in the table
below.
Reduction in grease lifetime of relubrication interval
The specified relubrication intervals are valid for maximum
ambient temperatures of 40 °C. For every 10 °C increase in
temperature, the lubrication interval must be reduced to half of
the value in the table.
Frame size
Relubrication interval
in operating hours at rated speed
Horizontal type of construction (B)
Vertical type of construction (V)
3000 rpm
1500 rpm
1000 rpm
3000 rpm
1500 rpm
1000 rpm
LOHER CHEMSTAR 1PS0, 1PS1, 1PS5 and SIMOTICS XP 1MD5 motors
160
2800
5600
8000
2000
4000
5600
180
200
225
250
2000
1400
2800
4000
280
4000
5600
315
355
2800
LOHER VARIO 1PS0, 1PS1, 1PS4 and 1PS5 motors
355 … 500
Values on request
Rated frequency
60 Hz
70 Hz
80 Hz
90 Hz
100 Hz
t
f
/
t
f50
0.75
0.65
0.55
0.50
0.45
© Siemens AG 2016