Siemens SIMOTICS S-1FT2 Operating Instructions Manual page 28

Description of the motors
2.2 Technical features and environmental conditions
Note
It is permissible that the radial shaft sealing ring runs dry.
With degree of protection IP65, it is not permissible for liquid to collect in the flange.
Sealing of the motor shaft
IP64
Labyrinth seal
It is not permissible that there is
any moisture in the area around
the shaft and the flange.
With degree of protection IP64, it is
not permissible for liquid to collect
in the flange.
For additional information, see Chapter "Shaft extension (Page 33)".
26
IP65
Radial shaft sealing ring without annular
spring
Sealing of the shaft exit against splash-
water or coolant. It is permissible that
the radial shaft sealing ring runs dry.
Lifetime approx. 25000 h (nominal
value).
With degree of protection IP65, it is not
permissible for liquid to collect in the
flange.
IP67
Radial shaft sealing ring
For gearbox mounting (for gearboxes that
are not sealed) to seal against oil.
The sealing lip must be adequately cooled
and lubricated by the gearbox oil in order to
guarantee reliable function.
Lifetime approx. 10000 h (nominal value).
If a radial shaft sealing ring runs dry, then
this has a significant negative impact on the
functionality and the lifetime.
SIMOTICS S-1FT2 synchronous motors for SINAMICS S120
Operating Instructions, 07/2021, A5E50610821B AB