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piston rings

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Philip Burley19/06/2018 20:41:07
66 forum posts
1 photos

How could I reduce the thickness of a piston rings from 3./16 to 1/8 inch with out a proper grinder


Jeff Dayman19/06/2018 20:55:32
1372 forum posts
36 photos

glue to temporary faceplate / faced bar end with good superglue CA glue, fill ring end gap with CI scrap 3/16 thick

mount temporary faceplate in lathe chuck

CAREFULLY with VERY light cuts face to 1/8" thick

mount Dremel-like motor tool in toolpost, with fine grit grinding wheel grind ring face smooth.

Do not let ring get hot at any stage, or ring will detach.

After finishing the ring detach glue with water and low heat.

Tricky, but I have done a few that way when there is no alternative.

not done it yet19/06/2018 23:27:35
2566 forum posts
11 photos

If doing as above, I would be doing it “belt and braces” by fitting the ring(s) into a 1/8” jig to emulate piston and cylinder.

The last time I had a similar problem I increased the ring gooves on the piston, but the difference on the rings and grooves were 1.50 and 2.00mm.

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