![]() ![]() Norton 3X as such and such and Micro Mesh as such and such and the beall compound as such and such so I used those three in that order and the polish does not look anything like when I just Micro Mesh the whole thing. I jsut forsee the day somneone will be complaining that the chart shows. switch from a cloth back carbon sandpaper to a paper back aluminum oxide one even if it is the correct grit progression, is not going to be a real good idea and results could very well be pretty poor. What material they are made out of has a lot to do with it and what that material is attached to also has a huge effect. in other words different products work differently for a lot of reasons other than what Micron size they are. smudges or other marks be start getting introduced etc. Sandpaper grit is sized by a gauge number, with lower numbers signifying larger, coarser grits. but if you then switch to using buffing compounds it may take longer for each compound to do it's best work. Microsoft Word - Sand Paper Grit Comparison. Micro mesh may only take a few second per grit to acomplish its best results. SANDPAPER GRIT COMPARISON P-SCALE FEPA US STD CAMI MICRON MICRO MESH AbrasivePads 50 351 P50 326 60 268 P60 260 P80 197 80 192 P100 156 100 141 P120 127 120 116 P150 97 150 93 LT Gray/Green P180 180 78 LT Gray/Green 220 66. I would caution people to watch for diffferences in sanding polishing results any time you switch from one product to another. but it is a very good way to keep products in order and figure out if you should buff with that compound before or after using Micro Mesh XX or whatever. ![]() Do be warned though that it does not show the entire story. 2Sand.Nice chart Larrry, I very good way to put some order to all of it. So next time you are wondering if the 120 grit sanding disk in your hand actually is cutting faster than you thought it would, be sure to check the actual label or talk to your supplier,and see which standard was used for grading!Īs ever, we invite you to share your thoughts and knowledge with us by commenting here on the blog, on our Facebook page, or via Twitter. I know that at times I have rubbed a new sheet of sandpaper on a cement floor to "break down" the grit a little bit because it was just a little too aggressive for the task at hand. You need to choose the grit size of sandpaper depending on the particular job you are trying to accomplish. Micro-fine grit Abrasive media with a Grit Size of 600 or finer is usually only used in wet blast cabinets. Conversion values for micro grit are calculated using ANSI Standard B74.18 (by sedimentation) at the 50 point. Now in truth, for most of us the difference between the CAMI and FEPA scales makes little enough difference on a day to day basis, but it is important to know about since there are times when the grit choice is important. 242 N Dixie Ave Cartersville, GA 30120 United States. Micro grit is measured by hydraulic or pneumatic methods. Add to this that the Japanese abrasives scale is different than the other two, and the plot thickens!Īnd while the rougher abrasives are pretty close if not exactly the same, at higher numbers, the differences become greater so a 400 grit CAMI falls between FEPA's P600 and P800! So P80 sandpaper is slightly more aggressive than 80 grit. 80 grit abrasive particles average 201 microns while P80 averages 192. But the two systems are NOT exactly the same, so an 80 grit sanding disk is NOT exactly the same as one labeled "P80". More recently, most manufacturers have switched to the FEPA system with a "P" preceding the number. For a long time, sanding supplies here in the US were labeled with the CAMI system which just used numbers. ![]() And then, to add to the confusion, a while back manufacturers changed the numbering standards almost without bothering to mention it, or why! We are here to help sort it out for you.įirst, you need to understand that there are different agencies that decide what grits are what numbers! There is the Coated Abrasives Manufacturer's Institute (CAMI) in the US and the Federation of European Producers of Abrasives (FEPA) in Europe. In the case of sandpaper, this means bigger particles and more aggressive stock removal. Like wire sizes, smaller numbers actually mean larger. But the sizing on sandpaper grit numbers seem to be backwards. No matter what sort of sanding supplies you are reaching for, the first decision you need to make is what sandpaper grit to start with. ![]()
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