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Diamond Mesh Finish

Diamond Mesh Finish

Diamond Mesh Finish

(OP)
Hello All


I have a drawing of a Quartz (Glass) component calling for a 220 Diamond Mesh finish.

Does any one know what is the equivalent is in either Micro inches or metric Um ?

Thanks

 JimP
equifilant

RE: Diamond Mesh Finish

Nope, and I don't believe there really is one, since it would depend on the process used (grit blast?  lapping?  buffing with a cotton buff?).  Realistically, I think you could expect about an 8 u-in finish, plus or minus, using 220 mesh grit/polish.  A bit higher if used in a tumbler or vibratory deburr process.

RE: Diamond Mesh Finish

The customer may be refering to the grit size in the grinding wheel used for fabrication.  I would expect a 220 grit (US mesh size) diamond wheel to produce a 32 microinch or better (probably no better than 20 microinch) finish on fused quartz.

Bruce
www.accuratus.com

RE: Diamond Mesh Finish

Hi jimp187,

Further to my post on a fixed abrasive wheel, I have attached a curve showing surface roughness vs. abrasive size on BK7 glass.  This glass is a little softer than fused silica but results should be similar.
Source:
Zschlommer, W. Precision Optical Glassworking A Manual for Craftsmen and Designers.  SPIE vol. 472. trans. Sachdev and Maxwell. 1984.

Bruce
www.accuratus.com

RE: Diamond Mesh Finish

The curve shown in my last post is for loose abrasive finishing eg lapping/polishing.

Bruce
www.accuratus.com

RE: Diamond Mesh Finish

Why don't you simply ask the customer what it means. It sounds like they may have a standard setup for this finish.

At one time we were making a part with wrinkle paint surface. The customer actually supplied paint samples showing acceptable finish and unacceptable finish.

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