The grinding wheel consists of three parts: abrasive, binder (binder), pores:

1. Abrasive: It is the main grinding part of the grinding wheel. It has sharp edges and corners, that is, a small cutting edge to cut the workpiece. The abrasive is often a very hard material, usually a compound such as silicon carbide (chemical composition is silicon carbide). Corundum (chemical composition is aluminum oxide), diamond, etc., the most common are emery grinding wheel and corundum grinding wheel.

2. Binder: According to different grinding wheel applications, there are ceramics, resin, rubber, metal, etc. The main function is to bond the abrasives together to form a grinding wheel with a certain shape.

3. Pore: Pore is also the main component of the grinding wheel. The purpose of the pore is to reduce the bonding strength of the binder and store the ground steel scrap. When the sharp part of the small abrasive is abraded, it will be bonded due to the pore. The strength is reduced and peeled off, revealing new sharp abrasive grains for further grinding.