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THM – BMM/OMM- Orbital Motors

When your machinery requires high-torque performance but is constrained by strictly limited space and weight requirements, the THM BMM/OMM Series is the ultimate solution. This economical, ultra-compact orbital motor utilizes a precision Gerotor gear set and an efficient shaft distribution flow design to deliver massive power from a micro-volume package. With displacements ranging from 8cc to 50cc/rev and the ability to handle intermittent inlet pressures up to 225 bar, the BMM series provides the smooth, reliable rotation needed for high-precision, small-scale industrial and mobile applications.

Core Technical Specifications:-

  • Motor Architecture: Micro-Orbital Motor (Gerotor Gear Set)
  • Displacement Range: 8 cc to 50 cc/rev
  • Maximum Continuous Pressure: 100 bar (Nominal) / 175 bar (Inlet)
  • Maximum Intermittent Pressure: 225 bar (Inlet)
  • Design Profile: Ultra-Lightweight, Economical, Shaft Distribution Flow


Key Features & Engineering Advantages:-

  • Exceptional Power-to-Weight Ratio: Engineered with an advanced construction that prioritizes high power output while maintaining an incredibly low weight. This makes it perfect for mounting on mobile arms, handheld tools, or lightweight machinery where every gram matters.
  • Precision Gerotor Gear Set: Manufactured using state-of-the-art devices to ensure a small physical volume without sacrificing volumetric efficiency. The Gerotor design provides a long, reliable working life with consistent performance across all speed ranges.
  • High-Pressure Shaft Seal: Features a robust, resilient shaft seal designed to bear high back-pressures. This critical feature allows the BMM/OMM motors to be safely integrated into complex hydraulic circuits in either parallel or series configurations.
  • Compact Shaft Distribution: Utilizes an efficient shaft distribution flow design that eliminates unnecessary bulk, allowing for a streamlined motor body that fits into the tightest mechanical envelopes.
  • Economical & Versatile: Provides a highly cost-effective rotary drive solution for engineers who need dependable, high-speed fluid power without the high price tag or footprint of larger orbital units.


Ideal Industry Applications:-

The ultra-compact size and high-speed capability of the BMM/OMM Series make it the preferred hydraulic drive for:

  • Specialized Handheld Tools: Hydraulic saws, pruners, and small-scale industrial drills.
  • Agricultural Attachments: Small seeders, fertilizer spreaders, and vineyard machinery.
  • Robotics & Automation: Compact drive systems for automated assembly lines and specialized robotic arms.
  • Mobile Utility Vehicles: Drive motors for small cooling fans, sweepers, and salt spreaders.

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