SIEMENS
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Siemens MD 50.1 · 2015
Gearbox options
Lubrication and sealing
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Overview
Lubrication
The gearboxes are filled in the factory with a high-quality lubri-
cant. Lubricants permitted for the various gearbox types and
applications are listed in the lubricant table.
Other oils from various lubricant manufacturers that have been
approved by Siemens AG can be found on the Internet in the
Service and Support pages in the List of approved and recom-
mended gear lubricants T 7300:
Note:
For ambient conditions with a high air humidity and salt-laden
atmosphere, we recommend that only mineral or PAO oils are
used.
Oil quantities
The lubricant quantity depends on the gearbox type, size and
mounting position. The corresponding oil quantities are speci-
fied in the operating instructions and on the rating plate of the
geared motor.
Sealing
The standard models of gearbox are supplied with high-quality
radial shaft sealing rings with dust protection lips. This sealing
design is reliable for a wide range of applications.
Special application areas and environmental conditions require
special radial shaft sealing rings and materials, which are coor-
dinated with the particular gearbox oil and environment.
This coordinated sealing system results in a high reliability and
availability of the plant.
When compared to standard sealing systems, the maintenance
intervals can be extended. This therefore reduces maintenance
costs.
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Sealing system
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Roller bearing greases for gearboxes and motors
The roller bearings of gearboxes and motors are lubricated in
the factory with a roller bearing grease that is coordinated with
the selected application area. The quantity of grease between
the rolling elements and the space in front of the bearing de-
pends on the operating conditions and the gearbox mounting
position. For operation in the selected application areas, it is not
necessary to lubricate the roller bearings.
We recommend that the grease filling of the roller bearings is
also changed when the oil or shaft sealing rings are replaced.
Other greases supplied by different lubricant manufacturers that
have been approved by Siemens AG are specified in the List of
approved and recommended gearbox lubricants T 7300.
Output shaft
sealing
Description
Ambient condition
Order code
Normal environmental stress
Standard seal
High-quality NBR radial shaft sealing ring with
dust protection lip.
Environment with low dust and pollution levels with
low moisture.
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Longer service life
Seal with longer
service life
The radial shaft sealing ring with protective lip
is designed with an additional seal on the internal
gearbox side.
The sealing system has a high degree of reliability
due to its resistance to impurities in the oil.
Environment with low dust and pollution levels with
low moisture.
G23
Longer service life and increased environmental stress
Seal for increased
environmental stress
This seal is equipped with an additional fiber disk.
In addition to the longer service life, it also
provides increased protection against higher
environmental stress as a result of dust and dirt
deposits. As a consequence, the sealing system
has a high degree of reliability.
For additional environmental stress, e.g. water jets
or significant levels of pollution as a result of pro-
duction materials, please contact your local
Siemens office.
Environments with increased pollution and dust
levels as well as low moisture.
Typical applications:
Production areas with increased pollution and dust,
such as wood chips, dusts or granulate as well as
occasional spray water.
G24
© Siemens AG 2015