I always use minimum force in removing old bearings but I do not hesitate
to use heat, oxy torch or the good old hammer if that is what it takes to
remove the bearing. I have never had a shaft fail directly because of the
method I have used to remove an old bearing.
There are some rules to observe to remove old bearings from a shaft.
1. Minimum force only. Do not use the oxy torch or a hammer if you can get
it off with a puller kit.
2. Only experts should try to use an oxy torch. By very precise application
you can cut the bearing away completely without touching the shaft.
3. If using a hammer to remove a bearing, use a drift or a punch of a
softer metal than the bearing and only strike it near to the point that the
bearing is holding.
A bearing stuck on a shaft or in a housing is not the end of the world. It
is not a job that the amateur should try unless he or she is supremely
confident. However, any professional engineer should have no difficulty in
removing it for you at minimal cost.
Cheers
Rod Diery
Kulin, Western Australia
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