Axial piston variable displacement motors are variable motors of the bent-axis design with axial piston rotary group for hydrostatic drive in open and closed circuits. In axial piston units with a bent axis design, the pistons, converting hydraulic pressure and angular displacement into torque, are arranged diagonally to the shaft and located directly above it. Specific torque and displacement can be achieved by adjusting the swashplate. In an open circuit, the hydraulic fluid flows from the reservoir to the hydraulic pump, where it is fed to the hydraulic motor through the directional valve. The output direction of rotation of the hydraulic motor can be changed, for example, by a directional valve. In a closed circuit, hydraulic fluid flows from the hydraulic motor directly back to the axial piston pump. Reversing the flow of hydraulic fluid in the pump changes the rotational output of the hydraulic motor.