Norton Ceramic Aluminum Oxide PSA Disc - 50 Grit, 20" Diameter, Non-Woven Abrasive Sanding Disc - Compatible with Bench Grinder & Angle Grinder - Perfect for Metal Finishing, Wood Sanding, and Surface Preparation

Norton R980 SG Blaze large-diameter, ceramic aluminum oxide wheels have longer life on hard-to-grind materials such as nickel and titanium alloys, stainless steel, chrome, and similar. The self-lubricating ”supersize” treatment helps cut cooler and improve workpiece finish.Coated abrasives have individual abrasive grains spaced at a predetermined distance from one another. This is a closed-coat disc. A closed-coat covers 100 percent of the surface with abrasive grains, for more stiffness and better surface finish than an equivalent open coat, where abrasive grit covers 50 to 70 percent of the surface. "Supersize" lubricant extends abrasive life by creating less heat at operation than an unlubricated abrasive. The lubricant also helps cut faster for an improved workpiece finish. The cloth backing is stiffer, tougher, and thicker than a paper or film backing. Cloth resists tearing while bending and flexing during use. Pressure-sensitive adhesive sticks when pressure is applied, without messing with solvents, water, or heat.Ceramic aluminum oxide is tougher than aluminum oxide, and is self-sharpening. It is formed in a process where alumina gel is dried and then crushed. These engineered crystals fracture and refracture at fine levels, to form a smooth, self-sharpening abrasive material. Ceramic aluminum oxide is most commonly used for medium-to-high material removal on metals.Abrasives are used for a variety of applications from shaping a part to fine finishing, depending on the grit size. Low grit numbers like 40 are coarse and are used for removing excess material and shaping a part. High grit numbers like 400 are fine and help to create a smooth surface finish.Norton Abrasives manufactures a wide variety of sanding, grinding, and polishing abrasives, and has been located in the United States since 1885. In 1990, Saint-Gobain purchased Norton, keeping its manufacturing facilities and offices in the same location. Norton/Saint-Gobain has been recognized as a Global 100 Sustainable Company, as well as earning ISO 9000 and 14001 certification for quality and environmental management standards.

Ceramic aluminum oxide is a self-sharpening grit that is harder, tougher, and lasts longer than aluminum oxide

Supersize lubricant helps cut faster and cooler for an improved workpiece finish

Large diameter disc for use on stationary disc machines for dimensioning and finishing metal and wood

Closed coat for a higher-quality finish than an open-coat disc

This disc is used with a molded rubber back-up pad (sold separately)