3M 70070996171 20 in. No Hole Disc 80-Grit Sanding Screen

3M Sanding Screens remove raised wood grain in the final sanding stage and scuffing between finish coats. Silicon carbide bonded to an open mesh for less loading, more consistency and long life. 3M Sanding Screen is a mesh screen with a strong fiber, uniform open construction and consistent cut from start to finish.

• Mineral coated sanding screen
• Shape: round
• Color: brown
• Open mesh fabric construction
• Use both sides of screen for long life
• Rinse and re-use screen
• Use wet or dry
• Sanding screen resists clogging

3M sanding screen uses silicon carbide as the abrasive material and has a diameter of 20 in. 3M incorporates this silicon carbide material into the sanding screen forming a grit of 80.
Specification parameters description:

Abrasive Material:
Values: A/O Aluminum Oxide AO A/Z Alumina Zirconia AZ S/C Silicon Carbide SC Alumina Zirconia Alumina zirconia is very dense and can be used under high temperatures for heavy-duty stock removal, wood planing, and grinding of fiberglass and plastics. The abrasive grain is designed to fracture during use so that it maintains sharpness. Aluminum Oxide Aluminum oxide is an artificial abrasive suited for general purpose stock removal and finishing. It is the mostly commonly used abrasive and can be used for most steels and ferrous alloys. Aluminum oxide is slightly softer but tougher than silicon carbide. Ceramic Ceramic is used for aggressive cutting and grinding of stainless steel, titanium, and metal alloys. The abrasive grain is designed to fracture during use so that it maintains sharpness. Diamond Diamond can be either natural or manufactured and is one of the hardest abrasive materials. It is commonly used for grinding and polishing stone and very hard steels, and for sharpening other cutting tools. Silicon Carbide Silicon carbide is a manufactured material that is extremely hard but brittle. It is commonly used for fast cutting under light pressure, particularly on cast iron, nonferrous metals, and materials such as glass and plastic. Synthetic Fiber Zirconium Zirconia Ceramic Aluminum Oxide
Grit:
Grit is a measurement of the size of abrasive particles embedded in coated abrasives. The most common standards for grit size are the United States CAMI (Coated Abrasive Manufacturers Institute) and the European FEPA (Federation of European Producers of Abrasives). A smaller grit number means larger particles and a coarser grade, while high number grits are used for finer work. Grit is generally a unitless measure but is sometimes measured in microns.