Thread: Grit diameter vs grit number vs scale

Are there any charts?

Which scales Norton, Naniwa and King use?

Thanks.

Conversion Chart Abrasives - Grit Sizes

ANSI is what Norton uses , JIS is for the Japanese stones

ANSI is only defined up to 1200.

What about 4000 and 8000 Norton?

Based on the chart, ANSI rating is directly proportional to grit size in microns, so you can extrapolate any ANSI rating. The same appears to be true for JIS.

Originally Posted by time2shave

Are there any charts?

Which scales Norton, Naniwa and King use?

Thanks.

What is grit diameter?

This chart shows J2000 roughly equal to ANSI 1000.

But I read elsewhere, that for the same grit number, Naniwa stones are finer than Norton. Were they wrong?

Originally Posted by time2shave

This chart shows J2000 roughly equal to ANSI 1000.

But I read elsewhere, that for the same grit number, Naniwa stones are finer than Norton. Were they wrong?

Depends on what you mean by 'finer'.
Grit rating all by itself, or with a scale is just a useless number.

The only meaningful thing is how a hone abrades particular type of steel and that involves a lot more than 'grit'.

I have read suggestions to go from 8k Norton to 8k Naniwa to 12k Naniwa.

Keep in mind that Grit ratings are at best within each series of hones if you start switching series and brand they become meaningless very fast...

I am trying to remember any thread on here (SRP) that mentions stacking a Norton 8k and a Naniwa 8k in a progression and just can't

Actually, the Norton, Naniwa SS and Chosera and the Shapton 8K's results are quite similar. Little different feeling on each stone though.

Have fun,

Lynn