Numerical control (NC) grinding machines are machine tools that use cutting tools to grind the surfaces of workpieces. Most grinding machines utilize high-speed rotating abrasive wheels for the grinding process, while a few employ oil stones, abrasive belts, and other grinding tools with free abrasive materials, such as honing machines, precision finishing machines, abrasive belt grinders, lapping machines, and polishing machines. NC grinding machines include various types like NC flat grinding machines, NC centerless grinding machines, NC internal and external cylindrical grinding machines, NC vertical universal grinding machines, NC coordinate grinding machines, and NC form grinding machines.