Metalfab Industrial Electric Vibrator - Manual (Page 15)

Metalfab, Inc. M3258-09/08
11
Electric Vibrators
Reassembly of new
bearings Before proceeding with bearing replacement it is necessary to:
1. Completely clean the bearing flange bore.
2. Check the bearing flange bore dimensions and compare with the outer
diameter of the outer race of the bearing. The bearing must have an
interference fit with the bearing flange seat. In other words, the outer
diameter of the bearing must be slightly larger than the inside diameter of
the bearing flange seat. Do not assemble the bearing into the flange if an
interference fit does not exist.
3. Be sure you keep the bearings together as a set, so the removable inner
races are not switched.
For reassembly of the new bearings, you must have a press of at least two tons
force that is adjustable from zero to two tons.
In order to press the bearings into the bearing flange seat, it is necessary to
machine a bearing pressing tube having slightly less diameter than the outer
diameter of the outer race of the bearing.
NOTE
The inner side of this bearing pressing tube must be relieved
in order to avoid pressing on the bearing rollers, inner race, or
cage.
When inserting the bearing, lay the bearing flange on a flat ring with
machined surfaces and insert the bearings by means of the bearing pressing
tool. Use the least amount of pressure required for introducing the bearing
into the bearing flange seat. Make sure the bearing reaches the bottom ledge
of the seat.
Then lubricate the bearing by hand-packing with the appropriate grease (see
the "Lubrication” section of this manual. It is then necessary to replace the
bearing seal using the same pressing tool as was used for the bearing. For
inserting the bearing seal into the flange, carefully tap the seal in place with a
plastic hammer.
Reassembly of the inner race of the bearing onto the shaft should be done in
adherence with the above mentioned bearing pressing operation and without
the use of direct heat.
Reassembly of
motor
When reassembling the motor, be sure to tighten all bolts securely and use the
compression washers.
For reassembly of the motor, care should be taken when reinstalling the
second bearing flange into the motor housing. This second bearing flange
should be slowly and—most important—evenly introduced into the stator
housing to prevent binding the bearing onto the shaft and damaging the
bearing.
After assembling both bearing flanges, it is necessary to check the shaft for
axial movement. The axial clearance should be from 0.010 to 0.060 inch.