You may also use it in some cases to remove varnish or paint. It's commonly used for sanding floors with a drum sander. For heavier projects, extra-coarse sandpaper may be an option. This grit range includes numbers 24 through 36. This section is for CAMI grit classes and numbers, which range between 24 and 1,000. While FEPA numbers are not identical matches to CAMI numbers, there are similar options. Higher numbers indicate a finer grit, and smaller numbers are for coarser sandpaper. Sandpaper comes with a number, which indicates the coarseness or fineness of the grit. This makes it simpler to select the right sandpaper grit for your project. However, it's easier to quickly learn the key points of different sandpaper grits. What are the different grits of sandpaper? There are several different sandpaper grit charts online. These are the most common sandpaper materials: Choosing a material depends on the project, which you'll learn more about in upcoming sections. For example, one material that may be suitable for metal may not be suitable for softer woods. There are several abrasive materials used to make sandpaper grains. Also, some types of metal shouldn't be sanded with too coarse of sandpaper. This can make it harder to paint or may make it look bad. For example, if the grit is too coarse for polishing wood, it can leave grooves instead of smoothness. Also, it's important to avoid an unsatisfactory aesthetic result. The main reason why the right grit is critical is to avoid surface damage. This is because finer grits helps to remove grooves or roughness left by coarser sanding products. Many sanding projects require a coarser grit at the beginning and a finer grit at the end. Sandpaper comes with a grit number grade. Also, there are angled or circular sandpaper discs that stick to power tools. For instance, there are larger sandpaper sheets for sanding heads that attach to poles. In addition to there being different grits, there are various sizes and types. People may sand objects by hand or with special tools. The abrasive substance is attached firmly with glue. Sandpaper is a special craft paper with an abrasive substance on one side. First, it's important to understand what sandpaper is and the different grit materials and numbers. What is the finest grit of sandpaper? What grit of sanding paper for wood is better? How about metal? This guide will answer those questions and more. On the other hand, because FEPA does have a tighter tolerance for particle size (= more consistent scratch pattern), some woodworkers prefer FEPA graded paper for fine finish sanding tasks.You have a project that requires sanding, but which sandpaper is right for your needs? Choosing the right grit is more important than most people realize. This is not a big deal for coarser grits because a finished surface is not the goal and hence CAMI is still used for grades coarser than 80 grit by most major abrasive manufacturers. In addition, CAMI is less stringent than FEPA in that it tolerates a wider range of particle sizes for a given grit grade. Above this, FEPA graded sandpaper becomes increasingly coarser than CAMI graded paper for a given grit size. The CAMI and FEPA scratch patterns are similar for the coarser grits up to 220 grit or so. (There are other standards such as JIS but it is rarely used outside of Japan). If there is a “P” in front of the grit number (ex: P180), the grading system is FEPA. Sandpaper is labeled on the back with the grit size. The “ought” system is an older grading system that is seldom used anymore but included here for sentimental reasons. CAMI is used primarily in North America whereas FEPA is used in Europe and many other parts of the world. CAMI and FEPA are the two most common grading systems in use today. This chart compares sandpaper grits using three different grading systems: 1) Coated Abrasives manufacturer’s Institute (CAMI), 2) Federation of European Producers Association (FEPA), and 3) the “0” or “ought” grade system. This entry was posted in Finishing on Decemby Bill Kovalick
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