1966 Brown & Sharpe 618 Micromaster spindle repair (pic heavy)

This was a really awesome thread Jeff. It was great to see you jump in with a "get it done" attitude. The finish on your test pieces looks great.

I have a Bridgeport 815 SG and get about the same finish you got before your build. My surface grinder also has a slightly odd sound, which I suspect is a bearing starting to get annoyed at running. It is going to have to wait though because I have too many projects on my plate.

Thanks for sharing your project!
 
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Looks a lot better; I was hoping that’d be the case. Nice work.
 
I never would have attempted this repair if Richard King hadn’t guided me along the way.
He also lined me up with some of his industry contacts which saved me a ton of money.
 
I tried again this morning using a fine white aluminum oxide wheel. The part now has an almost mirror finish that I just can’t seem to capture.
When you are only taking off .0005” or so the fine grain is ok in my experience.
I typically use course open grain wheels. Seems to do an adequate job.
 

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I just found this thread. My 618 surface finish looks likes Jeff's before he replaced the bearings. I've been hiding the finish with a creep grind retrofit by storagetek where I got it (2 units actually) for $75 at auction.

Jeff, where did you get the bearings ?
 
garymzz said:
I just found this thread. My 618 surface finish looks likes Jeff's before he replaced the bearings. I've been hiding the finish with a creep grind retrofit by storagetek where I got it (2 units actually) for $75 at auction.

Jeff, where did you get the bearings ?
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Sorry, I just saw your reply.

This is a quote from the third page of this thread

"
I highly recommend Bearing Brokers Inc.
The bearings were $103.89 each!!
Not $685 each which was quoted to me by the company that purchased Brown & Sharpe.
I’m good with NSK, Made in Japan.""

PM me if you can't find them.

 
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