Low Speed High Torque Nhm (S) 31 External Five Star Radial Piston Hydraulic Motor

The NHM(S)31 features a quad-row roller bearing crankshaft and reinforced external five-star stator, delivering up to 50,000 Nm torque at 0.3 RPM with 35 MPa peak pressure, making it the definitive extra large displacement radial piston hydraulic motor for mega-vessel anchor winches and mining excavator swing drives where no other motor can operate reliably under continuous shock loads.

Absolutely. Reversible rotation is factory-standard with symmetrical porting and balanced valve timing, enabling seamless forward/backward operation in anchor winches, mooring systems, and excavator swing circuits without cross-line relief valves, reducing system complexity and maintenance costs in demanding heavy-duty hydraulic systems.

The NHM(S)31 series covers displacements from 31,000cc to 40,000cc per revolution, generating up to 50,000 Nm continuous torque at 25 MPa, specifically engineered for direct-drive applications requiring massive torque without gearboxes, such as tunnel boring machines, bulk carrier capstans, and steel mill coilers.

The NHM(S)31 is manufactured to identical Italian Intermot technical standards with fully interchangeable mounting flanges, shaft dimensions, and port configurations, offering a cost-effective, high-pressure drop-in replacement for Staffa HMC10 and Italgroup NHM31 external five star motors with 50% faster lead times and comprehensive global field support.

Yes, we offer ATEX-certified versions with nickel-aluminum bronze housings and specialized seals for the NHM(S)31, enabling reliable operation in offshore platform subsea systems, LNG carriers, and mining equipment in explosive atmospheres while maintaining full high-pressure performance and safety compliance.