Chuck Reconditioning

Ja_cain · Aug 24, 2021

Going through this old chuck as wondering what the best way to clean up the taper? I have removed a fair amount of th rust just from hitting it with red and gray scotch Brite, but want to make sure I'm removing any high spots. Appreciate any help/advice.

Justin

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plastikdreams · Aug 24, 2021

500 or 1000 grit emory

TGTool · Aug 24, 2021

It's a little harder on that curved surface but on a table or fixture, stoning lightly with an India stone will show up any dings as bright spots, often crescents, that tell you if the surface needs more attention.

I had a supervisor give an apprentice one of those sponge backed sanding blocks to go over the milling table with. Worthless proposition.

michiganbuck · Aug 24, 2021

plastikdreams said:
500 or 1000 grit emory

If you can spin the chuck 320, 500, and 1000 grit emory set on the surface with a backer so it does not dip into the jaw cavities..move slowly in one direction only makes a pattern that looks like the original manufacturing process. The backer might be the likes of an old charge card. Yes, it is a little tricky doing that so be very careful...may need to double back tape the emory on. 100 Rpm is Ok.

eKretz · Aug 24, 2021

I would try using a little dykem and then giving it a rub on your mating taper. Concentrate on the high spots only until they are all knocked down, only then do the polish.

Ja_cain · Aug 24, 2021

michiganbuck said:
If you can spin the chuck 320, 500, and 1000 grit emory set on the surface with a backer so it does not dip into the jaw cavities..move slowly in one direction only makes a pattern that looks like the original manufacturing process. The backer might be the likes of an old charge card. Yes, it is a little tricky doing that so be very careful...may need to double back tape the emory on. 100 Rpm is Ok.

Can chuck it in my 4 jaw. My only hangup is that keyway. Lol!! Not sure I want to try that on a 15hp lathe. I might be able to chuck I in the smaller lathe though.

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