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    KYB Hydrostar MRH and MR Radial Piston Motors

    KYB Hydrostar MRH and MR Radial Piston Motors


    KYB Hydrostar MRH and MR series motors are low speed high torque (LSHT) radial piston motors. They act as a very durable ‘workhorse’ in a wide variety of industries and applications,

    With displacements from 208 cc/rev (12.7 in³/rev) to 8795 cc/rev 536.7 in³/rev the series comprises :

    • Single displacement models: MRH-12 | MRH-30 | MRH-45 | MRH-60 | MRH-80 | MRH-95 | MRH-135 | MRH-190 | MRH-270 | MRH-375 | MR-525 and MRHD-540
    • Multiple displacement models include: MRH2-45-1 | MRH2-45-2 | MRH2-95-1 | MRH2-95-2 | MRH2-135-1 | MRH2-135-2 | MRH2-190-1 | MRH2-190-2 | MRH2-270-1 | MRH2-270-2 | MRH2-375-1 | MRH2-375-2.

    Features include:

    • Speed is infinitely variable and the torque is constant over the entire speed range;
    • Excellent efficiency allows precise positioning of driven equipment;
    • Rapid acceleration, deceleration and reversing;
    • Large main bearings assure long life and allow heavy side load capacity;
    • 25 standard models offering up to 20,000 lb. torque;
    • Many multiple displacement models;
    • SAE ports including 4 bolt flanges and straight threads;
    • SAE splines and tapered keyed shafts are standard;
    • Several drain port locations to ease mounting;
    • Seals made of VitonÆ.

    Hydrostar MRH MR Series Technical Catalogue >>>

    Click on the “Model Codes and Technical Data” tab for more details on the full range of KYB Hydrostar MRH and MR series motors.

    Contact us for further technical details and configuration option

    Single Displacement

     Displ. in³/rev (cc/rev)Max Cont. Pressure (psi)Inter. Peak Pressure (psi)Speed Range (rpm)Max Cont. Power (hp)      
    MRH-1212.7 (208) 53535703-60042
    MRH-3030.4 (498)130035703-50085
    MRH-4545.5 (746)204035703-400120
    MRH-6061.3 (1005)256035703-380155
    MRH-8082.8 (1357)356035703-300175
    MRH-9593.4 (1531)413035703-300190
    MRH-135133.9 (2194)594035703-220200
    MRH-190191.6 (3140)867535703-175230
    MRH-270268.4 (4398)1164835703-125225
    MRH-375377.5 (6186)1630035703-120300
    MR-525523.9 (8585)1952030003-80220
    MRHD-540536.7 (8795)1980030003-100280

    Multiple Displacement

     Displ. in³/revMax Set. Pressure (psi)Inter. Peak Pressure (psi)Max Speed Range (rpm) @ 3000 psi Max Speed Range (rpm) @ 3570 psi Max Free Wheeling Speed (rpm)Max Horse Power (hp)      
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