Grit vs. Micron size - is this chart accurate?

[Nxspam]

Hi,

I found this chart via google. Can any of the experienced honers here confirm whether it's accurate?

http://thesharpenershop.com/2012/03/grit-size-versus-micron-size/

 

[andur]

I'd say it's hard to tell. For example I sometimes use my Dovo green paste and read somewhere that it's supposed to be a bout 6 microns. So in that case the paste should be well suited for removing metal from the edge at a good rate but it doesn't seem to do that very well. It'll still polish the edge even after very high grit stones. Or maybe pastes and stones can't be compared so well? Maybe the cutting/polishing dynamics are different?

 

[Nxspam]

I'd say it's hard to tell. For example I sometimes use my Dovo green paste and read somewhere that it's supposed to be a bout 6 microns. So in that case the paste should be well suited for removing metal from the edge at a good rate but it doesn't seem to do that very well. It'll still polish the edge even after very high grit stones. Or maybe pastes and stones can't be compared so well? Maybe the cutting/polishing dynamics are different?

Well, thanks for the reply, but I'm just trying to get a handle on the accuracy of the table in the link and grit vs. micron ratings. Not any particular medium like stone, film, paper or paste.

 

[Bayamontate]

This is the one I use:

American Standard (Grit)	Mesh	Micron
200,000 100,000	0-0.25 0-0.5	.125 .25
60,000	0-1	.50
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

 

[Nxspam]

Cool. That seems to confirm the one i found on the net. Thanks.

 

[Gamma]

http://stusshed.com/2009/06/05/qa-with-stan-watson-technical-director-dmt/

 

[pmaster]

I have another question. Does this apply to sandpaper as well? I just bought some from the store and was wondering if there was any equivalent to a stone (for example to use one to set the bevel until I buy a 1k hone).
Also, a side question, anyone knows how big a jump it is from 2000 grit sandpaper to mag polish (blue magic)?

 

[PapaFish]

You can check this thread out, and compare points. This is the latest graph (post #29) that I generated. Basically, "grit" is a generic term that gets thrown out, and there are 4 major systems that are used. You may be able to see the difference between American Standard (which you are showing), JIS (Japanese Stones), ANSI, and FEPA-F. Most folks on here are quoting either American Standard (Norton Stones) or JIS (Shaptons, Naniwas, etc.). When people say that 8K is the minimum they are able to shave off of, that is American Standard. Others will say they can comfortably shave off 5K, those are on JIS. 8K American and 5K JIS are both 3 micron stones. Different sources will quote slightly different numbers, so don't be surprised if some of the numbers seem off.

 

[Nxspam]

You can check this thread out, and compare points. This is the latest graph (post #29) that I generated. Basically, "grit" is a generic term that gets thrown out, and there are 4 major systems that are used. You may be able to see the difference between American Standard (which you are showing), JIS (Japanese Stones), ANSI, and FEPA-F. Most folks on here are quoting either American Standard (Norton Stones) or JIS (Shaptons, Naniwas, etc.). When people say that 8K is the minimum they are able to shave off of, that is American Standard. Others will say they can comfortably shave off 5K, those are on JIS. 8K American and 5K JIS are both 3 micron stones. Different sources will quote slightly different numbers, so don't be surprised if some of the numbers seem off.

Nice info. Thanks for that.