CB - B type gear pump is the power components in the hydraulic system. The pump gear with high precision, high strength cast iron shell structure, etc. Through mutual meshing gear will be lost by the machine's mechanical energy into hydraulic energy conversion device. In the hydraulic system, in order to provide a certain amount of hydraulic energy. The pump has simple structure, reliable operation, convenient maintenance and good adaptability to shock load, is widely used in machine tool hydraulic system, and can be used for other mechanical hydraulic system.