Siemens Sinamics S120M, Equipment Manual

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5.3 Mechanical properties
5.3.1 Shaft sealing ring
Protection against water alone is not adequate for cooling-lubricating mediums that contain oil,
can creep and/or are aggressive.
● Protect the S120M with a suitable cover.
● Choose a degree of protection for the motor that adequately seals the motor shaft.
Table 5-1 Sealing of the motor shaft
Degree of pro‐
tection at shaft
sealing ring acc.
to EN 60034-5
Shaft sealing Area of application
IP65 Radial shaft sealing ring with‐
out annular spring
Sealing of the shaft outlet against splashwater or
coolant. Dry running of the radial shaft sealing ring
is permissible.
Service life: Approx. 25000 h (nominal value)
It is not permissible for liquid to collect in the flange.
IP67 Radial shaft sealing ring Version, shaft flange: IP67 (optional)
For gearbox mounting (for gearboxes that are not
sealed) to seal against oil.
The sealing lip must be adequately cooled and lu‐
bricated by the gearbox oil in order to guarantee
reliable function.
Service life: approx. 10000 h (nominal value)
If a radial shaft sealing ring runs dry, this will nega‐
tively impact its functionality and the service life.
S120M
5.3 Mechanical properties
80
Manual, 06/2019, 6SL3097-5AW00-0BP1