A machine tool for grinding the surface of a workpiece. Most grinding machines use high-speed rotating grinding wheel for grinding, and a few use other grinding tools such as oilstone, abrasive belt and free abrasive for processing, such as honing machine, ultra precision machining machine, abrasive belt grinder, grinder and polishing machine.

Grinding machine can process materials with higher hardness, such as hardened steel, hard alloy, etc.; it can also process brittle materials, such as glass and granite. The grinder can be used for grinding with high precision and small surface roughness, as well as for grinding with high efficiency, such as power grinding.