Hardened Lathe Bearings Refurbishment

[david bennett 8Participant @davidbennett8]

You might well be right. I was thinking of the bushes. The area of concern here is one that is often relieved so a loss of hardness where there should be no contact doesn't matter, but you are right to warn care is needed.

dave8

[david bennett 8Participant @davidbennett8]

Well, after considering Howard Lewis' point, I realised I didn't know if large (relatively) lathe spindles were through hardened or case hardened,or something else. After a bit of research, it is still unclear – it could be either. It is quite reasonable to through-harden a hollow spindle of this size. From what I have seen, this is the most likely in a high-end lathe like this, but some form of selective hardening may have been chosen.

dave8

[James Jenkins 1Participant @jamesjenkins1]

A huge thanks for all your input on these. I think the take away is to maybe just double check for binding where the two tapers meet, address this issue with a very light stoning if needs be, but then await trials and testing to see if there are actually any serious issues.

This is what I will do.

Thanks again,

James

[Author]

Posts