Micron to Grit Graph
- Thread starter PapaFish
- Start date
Why is it Logarithmic graph?
- Thread starter
- #3
Halving the size of the grit doubles it's micron number, so I use a Log-Log graph to make it look linear.
Example, 120 grit is 120 micron, 1200 grit is 12 micron, 12,000 grit is 1.2 micron (roughly right?).
Does this answer your question?
Example, 120 grit is 120 micron, 1200 grit is 12 micron, 12,000 grit is 1.2 micron (roughly right?).
Does this answer your question?
Sweet geekery!!!
So it will be linear.
Perhaps it is easier to interpolate a given micron size vs. grit with a straight line.
- Thread starter
- #7
Yes you can interpolate, but the problem comes out to be that the "doubling one-halves the other" thing means it's a power law curve. Plus, if you look at the data points, they are not really too exact, but the overall trend on a log-log graph is pretty linear. If I plot it on a standard graph, the low end is completely useless, the middle range is all but useless, and the top end is ok, so you need lots of blow ups to make it work. This is the logical solution to graphing, but if you like, I linked to the data, and you can use that to get close on the numbers (just don't extrapolate!).
What I like about the graph is that I can see fairly accurately what different micron ratings would translate to in grit, so when someone says they have a 16,000 or 30,000 grit stone, I can see what micron paste may be it's equal.
I have to agree!!!
Looks like the largest deviance from the regression line is ~0.5u at ~10.5K. Who cares?
Oops. Sorry - doesn't look like a regresion after all. Just endpoint to endpoint I guess...
Oops. Sorry - doesn't look like a regresion after all. Just endpoint to endpoint I guess...
But, then you have to account for things like the shape of the abrasive, how much is exposed by the binder, friability, etc.
This is useful for me to determine what spray I can use with what grit hone. Seeing that my 12000 nani is roughly more than a micron, anything less than that should be safe to spray on it.
Thx for the info!
Thx for the info!
I thought Naniwa uses JIS, which is different from grit (which itself is also different from the ANSI standard).
- Thread starter
- #12
Not to mention the substrate that is used... These all come into play, so I guess I should have included the all important YMMV!
As for JIS vs. ANSI vs. American Standard Grit vs. Micron vs. whatever else... If you guys can find me a good source of data for them, I can whip out another graph (or two or three etc.) to show them in relation to each other.
Meh, close enough( I think?). I'm spraying .05 micron diamond so I think a few Ks difference is fine...according to the graph around 500,000 grit!?
Last edited:
That would be great!
Sure. I'm just saying that the gap is probably smaller.
Ah, any idea what the 12k nani grit is micron wise?
Hell if I know. Because of how they're measured, it's somewhat challenging to actually compare them. And, none of the charts that I've seen go beyond 8000 JIS. I'm not even sure if the standard technically defines anything higher than that. For anything at or lower than 8000 JIS, this seems useful: http://members.cox.net/~yuzuha/jisgrits.html
Hmm sounds like it's an "ancient Chinese(Japanese) secret". I would bet grit ratings among Japanese manufacturers differ too, although that seems unJapanese.
Thx for that link btw.
Some Japanese manufacturers use the American grit system (different from ANSI/CAMI, which is what is used by Spyderco and slapped on as a "rating" for Arkansas stones) and some use JIS (new or old, although most likely new). Then, as I mentioned earlier, there are the questions about the binder used. So, in other words, "yes".
Best graph so far. Special thanks to Komitadjie at Knife forums for making this.
