2MK2125, 2MK2135 and 2MK2150 series CNC deep hole honing machine adopt iron casting bed, is suitable for honing and burnishing cylindrical deep-hole parts, such as various hydraulic cylinders. It can also perform honing and burnishing step holes, and the hole diameter accuracy after honing can reach IT8-IT9, the surface roughness can reach Ra0.2-Ra0.4μm. it can also repair the taper, ellipticity and partial hole tolerance with the partial honing. It can directly perform high efficiency honing of cold drawing steel pipes. This series deep hole honing machine is an ideal machine for deep-hole machining with high accuracy and high efficiency.