MK*4,MJK*4,MGK*4 series high-precision CNC roll grinding machines are applied to steel rolling，metallurgy，nonferrous metal processing, papermaking, rubber, printing and dying，heavy equipment etc. They are suit for grinding any curve rolls ,for example:process work roll, support roll, press finishing roll, dryer .It is an important equipment for steel production. The precision of grinding machines will directly affect the material quality of the whole production line.