Staffa HMC Motor | HMC200, HMB080 | Two Speed Radial Piston Motor

Staffa HMC Series Two-Speed High Torque Radial Piston Motors

Product Overview: The Staffa HMC Series motor is a premier drive solution recognized globally in heavy industry and marine engineering. As a dual-displacement (two-speed) radial piston motor, it allows operators to switch displacements under load, providing a perfect balance between “High Torque/Low Speed” and “Low Torque/High Speed” modes. This featured selection includes the high-specification HMC-200/S/188/40/S04/X/70 (featuring frame size 200 with dual-displacement capability) and the base single-displacement model HMB080. Celebrated for its exceptional volumetric efficiency and smooth operation at ultra-low speeds, the HMC series is the preferred choice for crane winches, constant tension systems, and injection molding machinery.

Key Technical Advantages:

• Dynamic Two-Speed Shifting: Utilizing a reliable distribution mechanism, displacement can be shifted via pilot control (e.g., from 188in³ to 40in³) under load, optimizing operational cycle efficiency.

• Exceptional Starting Torque: The unique hydrostatically balanced connecting rod structure ensures that the motor delivers over 95% of nominal torque at startup, effectively preventing load slippage.

• Superior Low-Speed Stability: Radial piston technology eliminates low-speed “cogging” or jitter, supporting high-precision power output at speeds below 1 RPM.

• Robust Industrial Construction: Engineered for high fatigue life, the motor is built to withstand substantial radial loads and frequent direction reversals, significantly lowering long-term maintenance costs.

• Target Applications: Marine deck machinery (winches, windlasses), offshore drilling platforms, large-scale shredders, metal recycling extruders, and Tunnel Boring Machines (TBM).

Detailed Models & Parameters:

• Core Series: Staffa HMC Series (Dual Displacement Radial Piston).

• Model Keywords: HMB080, HMC200, HMC-200/S/188/40/S04, S04, X/70.

• Technical Specs Decoding:

  • HMC-200/S/188/40: Frame size 200, Max displacement 188 cu.in, Min displacement 40 cu.in.

  • S04/X/70: Specialized codes denoting splined shaft specifications, seal types, and technical revision levels.

• Pressure Specs: Rated operating pressure up to 250 Bar (3625 PSI), with peak pressures up to 293 Bar.

• Displacement Range: Flexible transition from high to low displacement to suit multi-functional duty cycles.