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The Grand Unified Grit Chart

Discussion in 'Maintenance, Tinkering & Embellishment' started by Komitadjie, Jun 13, 2011.

  1. cbwx34

    cbwx34

    Dec 27, 2004
  2. Komitadjie

    Komitadjie

    May 31, 2011
    They suggest a 400 mesh as the grit size there, which translates (roughly) to 37 microns.

    Missed that one the first time around, thanks! I'll add that to the next revision. :)

    I think I will also be presenting the next revision as both an image screenshot, and through Google Docs, so everyone can play with the numbers if they want.
     
  3. sinnyc

    sinnyc

    118
    Sep 9, 2013
    This is great info, thanks Komitadjie! Would it be possible to post this as a shareable spreadsheet, like in Google Apps/Google Drive? I'd like to be able to download the sheet and remove portions that I don't need. Just a thought.

    - Tim
     
  4. bobasaurus

    bobasaurus

    112
    Mar 13, 2013
    Thank you for posting this. I've always struggled converting between grits and microns, so this is very useful to me. Is there any way you could add buffing/stropping compounds to the list? I know some have a wide range of particle sizes (like how chromium oxide claims 0.5 microns but often has much larger grits mixed in), so it may be hard. It would be really interesting for buffing purposes, as the names are really generic and confusing... green rouge, white rouge, red rouge, white diamond, tripoli, bobbing, etc.
     
  5. kevhagan

    kevhagan

    1
    Nov 19, 2010
    Can we add the 3m finishing films to GUG? i use the psa poly backed aluminum oxide finishing films at 50, 40, 30, 15, 12, 8, 5, 3, 2, 1, .5, .2, and topping out at .05µ which should be 1,000,000 grit i think..the GUG needs lower numbers...and there is the cubic boron nitride in .75, .5, .25, .125, and .1µ
     
  6. Sadden

    Sadden

    795
    Dec 19, 2011
    Putting things already labeled in microns on this chart is redundant to me. Also 0.05u is equal to 320,000 grit not 1,000,000 grit.
    The CBN also goes much coarser , all the way to 200 and 300 microns. Then we would have to add Poly Diamond , Mono Diamond and Boron Carbide as well. Which are again all already measured in microns making it redundant , and clogging up the chart.
     
  7. VT Darkangel

    VT Darkangel

    52
    Dec 29, 2013
    Where do the Naniwa Superstones fall in here?
     
  8. Those are Japanese waterstones, so I'd assume they're graded to the JIS standard ('Japanese Industrial Standard'; first column). Vendor info shows 8 grits available from 220 through 12000 grit (see vendor description for the Naniwa Superstones below). Comparing those values in the JIS column, to the other columns in the chart, should give some idea as to how they compare to other stone/abrasive types.


    David
     
    Last edited: Feb 21, 2014
  9. landromus

    landromus

    47
    Jun 26, 2013
    I can not find the chart anymore! :(
    Is there a fresh link?
     
  10. loonybin

    loonybin Gold Member Gold Member

    May 18, 1999
    Not sure. Send me an email, and I'll attach the copy that I have to a reply.
     
  11. EatingPie

    EatingPie

    4
    Jan 15, 2013
    Seems that ImageShack is no longer hosting the images.

    Would you mind posting the latest version of the original chart again? It really is an absolutely great resource!

    I did find a reformatted/recolored copy [which I'm just linking to] in another forum that links to another forum.

    Source: http://www.razorandstone.com/showthread.php?1738-Grit-to-Micron-Comparison-Charts&p=18887&viewfull=1#post18887

    Please Note: Per loonybin, this chart is out of date.

    -Pie
     
    Last edited: Jun 21, 2014
  12. loonybin

    loonybin Gold Member Gold Member

    May 18, 1999
    That one is very outdated.
     
  13. EatingPie

    EatingPie

    4
    Jan 15, 2013
    Oh, uh… oops! Thanks for pointing that out. I didn't save off Komitadjie's last, so I have no frame of reference. I did try to check dates, but there was no way to know when something was created, only posted.

    -Pie
     
  14. fervens

    fervens

    291
    Apr 26, 2009
    [​IMG]
     
  15. Thanks, fervens.^^

    I would've sworn I saved a copy of that some time ago, but darned if I could find it. I was starting to kick myself... :)


    David
     
  16. Silver C.

    Silver C.

    1
    Jun 22, 2014
    Hi guys! I recently got a new knife. It's a spring assisted opener. After havering it for about a week, it started to make a rattling noise when I shook it. Now it's starting to make the noise when it's closed, but still fainter than when it's opened. Do you have any advice for
     
  17. adrieni

    adrieni

    12
    Sep 13, 2014
    what system does smith use and where would arkansas stones fall on this?
     
  18. FrankP999

    FrankP999

    9
    Aug 22, 2014
    the Edge Pro 1000 and 2000 are reversed in the table. The progression should be 600, 1000, 2000 not 600,2000,1000.

    Is there an excel spreadsheet version available?

    Thanks

    Frank
     
  19. loonybin

    loonybin Gold Member Gold Member

    May 18, 1999
    Actually, they are not reversed. The micron size of the stone was confirmed, but the micron size of the polishing tapes has not been verified, so they weren't moved from where they were originally thought to be. As far as I know, the micron size of the polish tapes are basically unknown.
     
  20. loonybin

    loonybin Gold Member Gold Member

    May 18, 1999
    Actually, they are not reversed. The micron size of the stone was confirmed, but the micron size of the polishing tapes has not been verified, so they weren't moved from where they were originally thought to be. As far as I know, the micron size of the polish tapes are basically unknown.
     

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