Everybody seems to have their own numbers.įWIW, if I wanted to mount abrasive paper or film to something for use on my WEPS, I’d consider removing the old 100/200 plates and replacing them with 1/8″ thick X 3/4″ wide aluminum or brass, using double-faced adhesive tape. That having been said, there are almost no vendors out there who hold to my standard. Twenty-five thousand four hundred divided by 15 is 1,693. One inch is 25.4 millimeters, or 25,400 microns. For instance, 15 micron abrasive would be 1,693 grit, as there are 1,693 fifteen-micron particles that fit into one inch. I, however am old,and therefor old school, which holds that the grit rating is the number of particle diameters which will fit into a span of one inch. For instance, there is a difference between 1500 grit and P1500 grit paper. Mr Wizard, a frequent denizen of these halls of knowledge, will freely share them with you. Good fun!!! Hope that helps…Īs Cliff says, there are several different grit cross-references. I then come back and sometimes put a micro-bevel with the same paper on top. If I had p5000 (5u rating), Id use it in a heartbeat and go straight to strops! B)Īnother neat trick is to take the last grit of paper and go directly sideways along the edge bevel, leaving a perfect satin finish with no scratch lines, even tho you dont take it to mirror finish. You can choose micron abrasive films or paste/strops to finish off to a sweet mirror finish. What you will hopefully find in following the 1000 grit WEPS with the p2500 is that the p2500 can leave a much smoother uniform finish(almost mirror smooth in appearance) I follow that with p3000 which is technically the same micron rating as the original WEPS 1000 grit stone, but there is a WORLD of difference in how it looks.Īfter that you are nearly at the finish line. Compare that to p2500 grit paper at 8.4u. If you look on either chart you can see the WEPS 1000 grit stone is at 7u(microns). There is a BIG micron difference between these types. I have found the very fine grit wet/dry auto paper usually has a designation of “P” in front of the number, p2000, p2500, p3000, etc. Wizard can correct me if I am getting this wrong but most sandpaper here(U.S.A) is in the CAMI(Coated Abrasive Manufacturers Institute) scale. Here is a quick read to see the differences: The confusing part is there are at least 3 or 4 grit “standards”. I also use sandpaper strips in the higher end area with great results. Wizard at one point even mentioned Komitadjie as his inspiration in doing his own independent version. I havent double checked that the values line up for every single thing between charts but Id guess the results are very similar for what we are interested in. Wizard and a fellow named Komitadjie both have made serious attempts and put ALOT of effort to make similar versions of a Comprehensive Grit Comparison Chart.
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