Thread: What is the highest grit you have used on a stone?

Originally Posted by Brighty83

Edit: This jnat stone i lapped from a 40 grit lol but it was in really bad condition. I first started with the 220 DMT and when i realised that wasn't working i put in on my belt sander. That didn't do anything so i purchased some 40, 80, 160 grit and so on - Took me 6 hours to get it flat (minus a break here and there).

I find SiC powders on float glass considerably faster. It may be there is no cushioning from the sandpaper but I can't imagine spending 6 hours, even on a hard stone.

Originally Posted by onimaru55

I find SiC powders on float glass considerably faster. It may be there is no cushioning from the sandpaper but I can't imagine spending 6 hours, even on a hard stone.

Its sorta relaxing, once i started to see results. lol. Its not something i would want to do too often.

I have done a google for SiC (silicon carbide powder) powders on float glass but i cant find much. The lowest grit i could find was 120. Do you have a site you recommend of the powders and the glass?

Originally Posted by Brighty83

Its sorta relaxing, once i started to see results. lol. Its not something i would want to do too often.

I have done a google for SiC (silicon carbide powder) powders on float glass but i cant find much. The lowest grit i could find was 120. Do you have a site you recommend of the powders and the glass?

Glass -- a local glass shop.
My grit -- hunt a local astronomy club.

Originally Posted by Brighty83

I have done a google for SiC (silicon carbide powder) powders on float glass but i cant find much. The lowest grit i could find was 120. Do you have a site you recommend of the powders and the glass?

Gem polishing sites are what you want

Tumbling Grit and Abrasives

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