ABRASIVE DISC

Abrasive discs are constructed using one (or more) types of backing. Backings are the flexible material to which abrasive grain is adhered to make coated abrasives and similar products. Typical backing materials include cloth, fiber, film, foam, sponge, and metal. Cloth discs consist of a woven fabric such as cotton and are used in aggressive applications such as abrasive planing. Fiber discs are denser than cloth and contain vulcanized or chemically treated cotton or cellulose fibers; however, fiber discs may curl under humid conditions. Film discs use abrasive grains on plastic film, while foam and sponge discs use abrasive grains bonded onto a foam layer, sponge, felt, or other soft, resilient materials. Similarly, metal discs use abrasive grains bonded onto a metal backing such as aluminum or brass. Other types of disc backing include paper, screen, non-woven, or aggregate materials. 

Features

Abrasive discs also differ in terms of mounting and special features. For example, hook and loop mounting attaches the abrasive using a hook and loop fabric whereas bore or center mounting use a central hole through which the disc attaches to the integral mandrel, arbor, spindle, or shaft. Other types of mounting include quick change and PSA/adhesive. In terms of features, abrasive discs may use an open or closed coat, metal bond, or disc roll. DeLappe and flutter discs have a series of radially cut shifts emanating from the center or around the disc periphery.