Inclined shaft type axial piston variable pumps. If the media contains water or solvents are to be careful, for open circuit hydrostatic drive. The flow rate, rotational speed and displacement are proportional to each other, and stepless variable can be realized under constant rotational speed.

 Between the rotor and the oil distributor plate for the spherical oil distribution, in operation can be automatically centered, servo according to the different components of the execution is divided into hydraulic servo, electrical servo and pneumatic servo. The circumferential speed is lower, the efficiency is higher, and the drive shaft can bear radial load.