ZGM Series Radial Piston Motor

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The ZGM Series is an advanced, high-performance hydraulic radial piston motor (traditionally referred to as an inner five-star motor). Engineered for exceptional mechanical and volumetric efficiency, this radial motor provides outstanding low-speed stability and massive starting torque. Designed as a universal solution for heavy-duty industrial and mobile applications, the ZGM series is dimensionally and functionally engineered to serve as a direct, drop-in replacement for existing GM5, INM5, and XHS5 series motors, making maintenance and system upgrades seamless.

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ZGM Series Radial Piston Motor

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Series Advantages

Product Advantages

Exceptional Low-Speed Stability: This radial piston hydraulic motor is capable of running completely smoothly at speeds as remarkably low as 1 rpm, completely eliminating cogging under heavy loads.

Direct Interchangeability: Features identical installation and flange dimensions to existing industry standards, allowing this motor radial to seamlessly replace GM5, INM5, and XHS5 without expensive system modifications.

High Starting Torque: The internal five-star geometry allows the radial piston motor to translate hydraulic pressure into immediate, massive rotational force right from start-up.

Robust & Durable: Built to handle high continuous pressures of 25 MPa and withstand severe peak pressure spikes up to 31.5 MPa, ensuring a long operational lifespan.

Technical Specifications

Product Series: ZGM Series (Including models ZGM05 through ZGM5)
Displacement Range: 59 $mL/r$ to 115 $mL/r$ (ZGM05 Series); scales up significantly for ZGM5 models
Rated Pressure: 25 MPa
Peak Pressure: 31.5 MPa
Rated Torque: 235 N.m to 458 N.m (ZGM05 Series); scales higher for larger sizes
Speed Range: 1 to 700 rpm (Maximum continuous speed up to 1000 rpm)
Weight: Starting at 22 kg (ZGM05 series)
Interchangeability: Completely replaces GM5, INM5, and XHS5 models
Output Shaft Options: Rectangular male spline, DIN 5480, and UNI 221 compliant options
Port Connections: Standard BSP and G-thread configurations (e.g., G1/2" drain ports)

Application Industries

Application Scenarios

Marine & Deck Machinery: Ideal for heavy-duty marine applications, including anchor winches, mooring capstans, and deck cranes that demand immense lifting torque. Plastic Injection Molding: Provides the perfectly stable, high-torque rotary drive necessary for running extruder screws in large injection molding machines. Construction & Mining: Highly favored for geological drilling rigs, heavy trenchers, and track drives where continuous, reliable pulling power is critical. Industrial Automation: A reliable radial piston hydraulic motor for large-scale conveyor systems, industrial mixers, and heavy material handling equipment.