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Post by Pat on May 30, 2012 17:57:21 GMT -5
???How can I tell what grit a diamond bur is? I have been advised to start with X grit and end with Y grit. Yet I cannot tell by looking which mandrel is which grit. There must be a way. Thanks!
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jason12x12
freely admits to licking rocks
Member since October 2011
Posts: 798
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Post by jason12x12 on May 30, 2012 18:35:52 GMT -5
Jason (shrugs)
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Don
Cave Dweller
He wants you too, Malachi.
Member since December 2009
Posts: 2,616
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Post by Don on May 30, 2012 18:59:06 GMT -5
an experienced eye can tell the grits apart, up to a point...the really fine grits are tough to distinguish. you could score some glass with them and look at the size of the scratch marks they make.
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Post by Pat on May 30, 2012 19:14:51 GMT -5
Don, good idea. I'm going to try to mark them. It would be useful if the manufacturers stamped the grit number on the mandrel somewhere!
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Post by jakesrocks on May 30, 2012 23:09:12 GMT -5
You could try to color code them. Just put a ring of paint around the shank just below the grit. Make a chart and color code each grit with a different color. You'll be able to tell at a glance which grit you have. If the paint won't stay on the shanks, try different colors of heat shrink tubing. Use tubing just big enough to slip over the shank. A 1/8" piece should be long enough. Just shrink it with a hair dryer or match.
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Post by johnjsgems on May 31, 2012 10:36:06 GMT -5
I like Don's ideas. Of course it would be easier if you did it when burs are new and still in whatever assortment pack they came in. If used and all mixed up, good luck. Most common grit for import burs is 120. It is easy to spot as well as really coarse like 30 or 40. Picking out 400 from 600 by sight would be harder. You could match them all by sight as best you can and then test them on a rock.
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