GM4 SERIES

The GM4 Series by SAI Hydraulics is a range of large displacement radial piston hydraulic motors engineered for high-output, low-speed applications that demand extreme torque, long duty cycles, and robust structural integrity. Designed for the most demanding environments, GM4 motors deliver efficient and consistent power in both mobile and industrial systems.

Product Description

Built with a hydrostatically balanced radial piston mechanism, the GM4 Series minimizes internal friction and delivers high mechanical efficiency. The series is tailored for heavy-duty applications, offering a modular configuration that supports integrated brakes, dual displacement control, and other hydraulic management options.

Key Features

• Very high displacement for maximum torque output

• Hydrostatically balanced rotating group ensures long life and smooth operation under load

• Modular construction allows integration of functional components such as brakes and control valves

• Excellent performance at low speeds, ideal for direct-drive and heavy-load applications

• Designed for extreme working conditions, including high pressure and continuous operation

• Consistent efficiency across a wide range of speeds and pressures

Technical Specifications

• Displacement range: Approximately 1,300 cc/rev to over 2,000 cc/rev (varies by configuration)

• Maximum pressure: Up to 450 bar

• Speed range: Optimized for very low to moderate RPM applications

• Torque: Exceptionally high, suitable for direct drive of large mechanical systems

• Mounting options: SAE, ISO, or custom flanges available

• Shaft types: Available in keyed, splined, or specialized forms

• Optional components: Dual displacement control, integrated multi-disc brakes, speed sensors, flushing valves

Applications

The GM4 Series is ideal for applications involving high torque and continuous, rugged duty cycles. Common sectors and systems include:

• Offshore and marine winch drives

• Tunnel boring machines and mining rigs

• Heavy construction machinery

• Steel industry rolling mills and drive rollers

• Large rotary actuators and heavy-duty material handling systems

• Hydraulic propulsion and anchor handling systems