Hand Tools Archive

Subject:
Re: If I understand....
Response To:
If I understand.... ()

AlanWS
I'd agree with this assessment, and say it's consistent with the experience I've had with grinding telescope mirrors: loose grit on glass abrades both surfaces, and requires frequent renewal of grit, but fine grit on softer pitch abrades only the harder glass, and requires less frequent renewal.

When I flattened a severely dished oilstone I found loose grit to be much more efficient than other abrasives I had. To grind quickly I found that sprinkling the grit on sandpaper affixed to glass worked well. The sandpaper can be worn out and any grit because its role is simply to keep the loose grit from easily slipping sideways in use. This cut many times faster than the other methods I tried, but of course I didn't try everything.

© 1998 - 2017 by Ellis Walentine. All rights reserved.
No parts of this web site may be reproduced in any form or by
any means without the written permission of the publisher.

WOODCENTRAL, P.O. BOX 493, SPRINGTOWN, PA 18081