Numerical Control (NC) grinding machines are machine tools that use grinding tools to process the surface of workpieces through numerical control technology. Most grinding machines utilize high-speed rotating abrasive wheels for the grinding process, while a few use oil stones, abrasive belts, and other grinding tools with free abrasive materials, such as honing machines, ultra-precision grinding machines, abrasive belt grinders, polishing machines, and lapping machines, etc. NC grinding machines include NC flat grinding machines, NC centerless grinding machines, NC external and internal circular grinding machines, NC vertical grinding machines, NC coordinate grinding machines, and NC form grinding machines, among others.