Chucking up a camshaft in the lathe

[Pevehouse]

You can't put metal back, you can only take it off. Polishing will not improve the performance of an old worn cam.
I'd use a very light abrasive like rubbing compound and a piece of cloth or denim
If you are building a model engine from scratch that's

It depends on the problem.
If take it a hard chrome shop the grind the bearing and chrome oversize and grind back to size . Not cheap.

If trying to save money use a tool post grinder and just a little off as possible. Use center and a steady rest on next close bearing.

Just use some grey scotch bright by hand, or as said above just clean with solvent and reinstall as is. Mike

Thank you

 

[tq60]

You do not polish the lobes, just the bearing areas.

The cam is parkerized, which makes the surface better for oil film if I recall. I have been 45 years since I worked in the Cam Department...

We polished just the bearings.



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[Geswearf]

You do not polish the lobes, just the bearing areas.

The cam is parkerized, which makes the surface better for oil film if I recall. I have been 45 years since I worked in the Cam Department...

We polished just the bearings.



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For a new, modern cam, yes, but would not an old one be polished and worn from use and the parkerization all gone?

 

[tq60]

Based on where the cam goes, old one does not go back in.

New or reconditioned one does.

If a special cam, it can be redone.

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