![]() ![]() This kind of grit is used to sand bare wood to prepare it for varnish removal or final finishing. However, it may not leave behind the smoothest surface texture. ![]() This sandpaper allows you to clear away a layer of finish or debris with little effort. The typical diameter of the sandpaper grit ranges between 336 to 425 micrometers. As per FEPA standards, these are classified as P40 or P50 and are denoted as 40, 50, or 60 by CAMI standards. These types of sandpaper grit classes ensure rapid material removal. The average diameter of the sandpaper grit particles can range anywhere between 530 to 1815 micrometers. As per the FEPA standards, the sandpaper grit sizing is denoted by P30, P36, P12, and P16, while the CAMI standards denote the classes as 24, 30, or 36. Because of the roughness, extra coarse sandpaper is used for the initial round of sanding on hardwood flooring. This highly coarse sandpaper grit ensures expedited removal of all kinds of material. The one thing they all have in common is that abrasive papers in this family all have fewer grains, but the grains they have are large. I’ll be adding to this chart as I get more statistics, but this chart is a good first stab.īelow you can download an Excel spreadsheet (and modify it if you please) and a pdf of the chart for those readers who aren’t chartered accountants.Macro grit sandpapers range across the following sub-types. Please keep in mind that these are published statistics I have no way (or desire) to measure the actual particle size or consistency of the media. – Other stuff (diamond paste, green compound, ceramic diamond media) ![]() – Man-made stones (silicon carbide and aluminum oxide) So with the help of readers and published statistics, I’ve put together a spreadsheet of common sharpening media and converted them to microns for you. So the smaller the number in microns, the finer the grit. One micron is one-millionth of a meter (hey, I just used the metric system). A micron is a measurement of the diameter of each particle of grit in your stone and paper. Now I don’t want to bore you with a discussion of microns, but here’s the short explanation. The good news is that you can convert all sharpening media to microns and get a better picture of where your sharpening stone or paper is in the continuum from cinderblock (coarse) up to baby’s behind (very fine). Your edge won’t improve when you move to the extra-fine stone. Well good luck, both of these stones are the same grit (22 micron). Here’s an example: Say you want to use a soft Arkansas oilstone as your coarse stone and an extra-fine India (aluminum oxide) stone to finish things up. Just start with the coarse media and proceed to the fine one.īut if you start mixing brands or systems, you can get in trouble. If you stick with one system and one brand (say, you use Norton waterstones exclusively), this isn’t a problem. The reason is that sandpaper, waterstones, oilstones, diamond stones and silicon carbide stones all use different systems to tell you how coarse or how fine the material is. (Heck, #1,000-grit sandpaper in the United States isn’t the same as #1,000-grit sandpaper in Europe.) A #1,000-grit waterstone isn’t the same grit as #1,000-grit sandpaper. Your edges get keener but you get more confused about the “grits” used in the process. Once you get serious about sharpening, two things happen.
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