Sandpaper grit chart plastic4/30/2024 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. 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. 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.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |