Riva Calzoni S.p.A. MRDE500498336 Radial Motor

The Riva Calzoni MRDE500/498-336 Radial Piston Motor (part number 5247788) is a radial hydraulic motor in the MRD/MRDE family from Riva Calzoni Oleodinamica SpA, engineered to convert pressurized fluid into rotational motion at low speed and high torque. MRDE denotes the expanded, dual-displacement version, where the drive shaft’s eccentric cam can move radially to vary displacement as the motor operates. Its mechanism uses a telescoping cylinder and piston arrangement that transmits force through a fluid column, enabling self-aligning seals, reduced wear, and high starting torque with smooth, pulsation-minimized performance. This model is specified for demanding hydraulic drive applications and is cataloged as MRDE500/498-336 with the associated part number 5247788.