Rockwell Automation 1329R Std. Industrial AC Induction Motors - Manual (Page 15)

Standard Industrial AC Induction Motors 15
Removing Brackets and Rotor
1. Remove bearing cartridge nuts or screws (if used).
2. Remove opposite drive end bracket bolts.
3. Pull bracket.
4. Remove drive end bracket in same manner.
5. Remove rotor.
Removing and Replacing Ball Bearings
Bearings should not be removed unless they are to be replaced. When
removal is necessary, use a bearing puller. A bearing puller may be
rigged by using a metal plate with holes drilled to match the tapped
holes in the inner cap. Use care to keep the pressure equal to prevent
breaking the cap.
To install a bearing, heat the bearing in an oven at 121 degrees C (250
degrees F). This will expand the inner race, allowing it to slip over the
bearing seat. All bearings must be replaced with the identical part. In
many cases special bearings are used which cannot be identified by
markings on the bearing. In all cases, when replacing bearings, use
markings on bearings and motor identification number to obtain
correct replacement bearing. The majority of bearings used now have
a C3 internal fit.
Reassembly
Follow reverse procedure as outlined above. Having marked the
brackets in the original position, replace as marked.
Lubrication of Bearings Motors covered by this Instruction Manual are equipped with several
types of bearings. This description covers regreasable anti-friction
bearings only. Non-regreasable ball bearings require no periodic
maintenance.
Grease Lubricated Bearings
This motor has been properly lubricated at the time of manufacture. It
is not necessary to lubricate at time of installation unless the motor
has been in storage for a period of six months or more.
Lubrication of anti-friction bearings should be done as a part of a
planned maintenance schedule. The Recommended Lubrication
Interval should be used as a guide to establish this schedule.
Cleanliness is important in lubrication. Any grease used to lubricate
anti-friction bearings should be fresh and free from contamination.
Similarly, care should be taken to properly clean the grease inlet area
of the motor to pre vent grease contamination.