HDCNC traditional cylindrical grinder(other name: manual external grinder) is divided into M14 series and M13 series. M14 series is a universal cylindrical grinding machine, which can grinding the outer circle, the outer conical surface and the inner hole. The head frame can realize the grinding process according to the chuck. The Angle of the grinding wheel frame and the table can be adjusted to adapt to the workpiece grinding with different taper. While M13 series is a special cylindrical grinding machine, which can grind the outer circle and conical surface. The grinding wheel of the same specification is larger than that of M14 series, which can realize long-term and stable grinding. The series of grinding wheelhead is not rotatable, and can realize cone grinding by adjusting the Angle of the table.