Kungfu Eagle offers plastic backing flap discs (alumina oxide) in a variety of specifications, including 4", 4.5", 5", 6", 7" and other specifications. We also offer customized sizes according to customer requirements. Our flap disc is composed of a plastic backing plate and an abrasive cloth of a alumina oxide combined with glue.
Alumina oxide is a brown artificial corundum made from smelting raw materials of bauxite and coke in high temperatures in an electric arc furnace. It features a high purity and an outstanding grinding performance, ensuring that flap discs made using alumina oxide can be used for grinding general-purpose steel and forging and casting iron, hard bronze or other metal materials.
During usage, the high strength plastic backing will not brake, even when a rotation strength reaches 15200 rpm. The plastic backing plate also features a low cost, making it easily affordable. For customers that will be applying pressure for high hardness polishing applications, upon request, we can replace the plastic backing with iron, based on customer needs.