Staffa HMB & HMC Motor | HMB-200, HMB200/S/FM4 | Two-Speed Radial Piston

Staffa HMB & HMC Series LSHT Radial Piston Motors

Product Overview: The Staffa HMB and HMC Series motors are the premier choice for heavy-duty industrial and marine drives. As a global leader in radial piston technology, these motors are renowned for their exceptional torque stability and high-pressure reliability. This selection features core specifications: HMB-200-S3-S04-70 (Fixed displacement classic) and HMB200/S/FM4 (Series specification with dedicated porting). Utilizing a hydrostatically balanced connecting rod design, Staffa motors minimize internal friction while delivering pulse-free power even at ultra-low speeds.

Key Technical Advantages:

• Exceptional Starting Torque: Precision-engineered valve and piston arrangements ensure a starting torque of over 95% of nominal torque, effectively eliminating “stick-slip” under heavy loads.

• HMC Series Dual Displacement Shifting: Allows for dynamic displacement switching via pilot control while under load, balancing high-torque/low-speed and low-torque/high-speed requirements.

• High-Pressure Robustness & Long-Life Bearings: Rated for 250 Bar (3625 PSI) continuous pressure, with reinforced bearing systems capable of handling extreme radial and axial loads.

• Modular Versatility: Available with multiple shaft options (e.g., S04 splined) and porting backplates (e.g., FM4), allowing seamless integration into complex hydraulic control systems.

• Target Applications: Marine winches and windlasses, injection molding screw drives, mobile cranes, TBM rotation, and heavy-duty conveyor systems.

Detailed Models & Parameters:

• Core Series: Staffa Radial Piston LSHT Motor (HMB & HMC Series).

• Model Keywords: HMB200, HMB-200, HMC200, S3, S04, FM4, 70 (Design Code).

• Technical Specs Decoding:

  • HMB-200-S3-S04-70: Frame size 200, S04 splined shaft, design sequence 70.

  • HMB200/S/FM4: Frame size 200, S-type structure with FM4 specialized distribution manifold.

• Pressure Specs: Nominal pressure 250 Bar, Peak pressure 293 Bar.

• Displacement: 200 Series delivers a robust 3287 cm³/rev (200.6 in³/rev) output.