CBY gear pumps are divided into three series (CBY2, CBY3, CBY4),with the output volume coverage of 10-200 ml/r, working rotary speed of 600-3000r/min and maximum working pressure up to 25 Mpa.The pump adopts high strength wear-resistant nodular cast iron pump body, Du bearing with high bearing capacity, axial floating side plate forclearance compensation, and radial hydraulic pressure for partial balance structure, which has characteristics of high pressure, wide speed range, reliable operation, long service life, easy maintenance and stable performance, etc..There are three kinds of connection for installation shaft extension,namely, flat key, metric involute multiple keys and rectangular multiple keys. The oil port is equipped with flange connection, and it can also form a multi-pump. Besides, it is an ideal power element in the hydraulic system of loader, bulldozer and other construction machinery, mining machinery and hoisting and transporting machinery.