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VMC Mill spindle runout

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Hopper

21/11/2022 03:47:34

7881 forum posts
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That's a pretty good result. Reduced the original .035mm runout to .01mm. Not perfect but should work ok for home hobby use.

I would not worry too much about runout 200mm down from the nose. How many milling cutters that long will you be running? Try a piece of ground bar about as long as a typical milling cutter for a more useful idea of what to expect under cutting conditions.

You could heat bearings up a bit more than that for installation, as long as they have steel or brass cages etc and not the plastic ones. 120C would be ok in most cases. And you can freeze the spindle overnight too. But probably would not make a great difference in fit from 80C on such a small diameter.

Edited By Hopper on 21/11/2022 03:48:00

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