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bearing change

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John Rudd:

--- Quote from: Ben on June 09, 2017, 04:46:05 PM ---Did this on my CJ18A  "taper rollers" did not fit the shaft difference in dimensions damaged the shaft, plus seals are a problem
this cost me a new shaft, so went with angular contact bearings
Looking back i think the original bearings where just as good

--- End quote ---

Shame I did not hear of this earlier.....
Ben, the spindle on the mini mill/lathe is designed for standard ball races, and as such are an interference fit on the shaft and housing.
Taper rollers are designed for a slidibg fit on a shaft with an interference fit in housing.
When I change both of my machines to tr bearings, I used wet n dry paper to polish the spindles for a tight sliding fit of the inner races to ensure the bearings would preload on assembly.

seadog:
On my Boxford they're not John. Had a hell of a job dismantling the spindle.

davidcurtis021:
well i did lots of research read your comment's and sought the opinion of good friend's and i decided i'll go with the taper roller option, but at the same time i'm investing in a new 4 inch spindle.

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