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GRIT AND MESH SIZE QUESTIOn

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docharber has rocks in the head Member since October 2008 Posts: 716	GRIT AND MESH SIZE QUESTIOn Dec 14, 2008 14:14:15 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by docharber on Dec 14, 2008 14:14:15 GMT -5 Does anyone know how grit and mesh sizes compare? How are abrasives graded into a particular size particle? Just wondering- Mark H.

darrad
fully equipped rock polisher

Member since September 2006
Posts: 1,636

GRIT AND MESH SIZE QUESTIOn Dec 14, 2008 15:58:49 GMT -5

Quote

Post by darrad on Dec 14, 2008 15:58:49 GMT -5

This what ya after?

Grit - Mesh - Micron Conversion
American Standard (Grit)
Mesh
Micron

100,000 0-0.5 1/4
60,000 0-1 1/2
14,000
0-2 1
13,000 1-2 1.5
9,000 2-3 2.5
8,000 2-4 3
5,000 2-6 4
4,500 4-6 5
2,800 5-10 7
1,800 6-12 9
1,400 8-20 14
1,200 10-20 15
1,050 12-25 18
800 20-30 25
600 20-40 30
500 30-40 35
325 40-50 45
285 50-60 55
240 60-80 70
225 80-100 90
160 100-120 110
100 120-160 150

Dave

drjo
fully equipped rock polisher

Honduran Opal & DIY Nut

Member since May 2008
Posts: 1,581

GRIT AND MESH SIZE QUESTIOn Dec 14, 2008 16:38:55 GMT -5

Quote

Post by drjo on Dec 14, 2008 16:38:55 GMT -5

They use different size screens to filter with or a buoyancy (in liquid) method to separate sizes. (there was an air method used at one time similar to the buoyancy one but blew the particles up into the air). The liquid was more accurate.

Last Edit: Dec 14, 2008 16:41:31 GMT -5 by drjo

Those Who Can...Do

Those Who Can't...Ask My Advice

docharber has rocks in the head Member since October 2008 Posts: 716	GRIT AND MESH SIZE QUESTIOn Dec 25, 2008 0:32:37 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by docharber on Dec 25, 2008 0:32:37 GMT -5 Thanks, guys. The chart is great. Have a great holiday. Mark H.

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Welcome to the Rock Tumbling Hobby Forum where we share a love of rocks and a sense of community as enduring as the stones we polish. The RTH Forum of www.RockTumbling.com is an Amazon Associate site and we earn money from qualifying purchases you make after clicking on our links such as this Rock Tumbling Supplies on Amazon link for instance, or any of our various product ads and banners. By clicking our links every time you begin your Amazon shopping experience, you are generating a bit of revenue for the forum which helps us cover our expenses. Thank you for your support!