Rolling-Contact Bearings; Cleaning The Spent Grease Chamber - Siemens 1PH818 Operating Instructions Manual

Maintenance
9.1 Inspection and maintenance
NOTICE
Inspection if there are faults or unusual conditions
Unusual conditions or faults that represent electrical or mechanical overstressing of the
three-phase motor, such as overload, short circuit, etc. can cause consequential damage to
the machine.
If there are faults or unusual conditions such as overload or short circuit etc. immediately
perform the inspections.
Measures, maintenance intervals
Operating conditions and characteristics can vary widely. For this reason, only general
maintenance intervals can be specified here.
● Maintenance intervals should therefore be scheduled to suit the local conditions (fouling,
● Perform the following measures after the operation time or the interval specified in the
Table 9-1
measures
Initial inspection
Regreasing
Permanent lubrication (with coupling
output)
Cleaning
Main inspection
[ID: 357.01]
9.1.2.3

Rolling-contact bearings

The motors have rolling-contact bearing bushes for grease lubrication. Depending on the
version, the motors are permanently lubricated or are equipped with a regreasing device.
Depending on the type of load, a deep-groove ball bearing or a cylindrical-roller bearing is
fitted as a floating bearing on the drive end. For the bearing assignments as well as the
associated permissible lateral forces and minimum loads when cylindrical-roller bearings are
installed at the drive end, refer to the catalog or contact your sales partner.
The DE bearing contains built-in compression springs that help to rebalance the axial play of
the external bearing rings.
9.1.2.4

Cleaning the spent grease chamber

The rolling-contact bearing's spent grease chamber only has room for a limited amount of
spent grease. When the spent grease chamber is full, the spent grease must be removed,
58
switching frequency, load, etc.).
following table elapses.
Measures after operating times or intervals
Operating tines and intervals
After 500 operating hours, at the latest after 1/2 years
See lubricant plate plate
Replace bearings after approximately 20,000 operating hours,
at the latest after 3 years
Depending on degree of local fouling
After approximately 16,000 operating hours, at the latest after
2 years
Siemens AG Operating Instructions V1.0 1PH8
A5E02605207A AA