MR2800I-F1N1N1S2NX Parker Calzoni Radial Piston Motor 2792cc

Product Overview

The MR2800I-F1N1N1S2NX CM24-2800 is a low-speed high-torque (LSHT) radial piston hydraulic motor from the Parker Hannifin Calzoni MR series. Featuring Parker’s unique fluid column technology, this fixed-displacement radial piston motor is engineered for demanding hydraulic transmission applications across mobile machinery, marine engineering, and industrial equipment.

The Parker Calzoni MR series covers 10 frame sizes with 39 standard displacements, ranging from 75 cc/rev to 9000 cc/rev. The MR2800I, as a large-frame model in the series, delivers 2792 cc/rev displacement, with 250 bar rated pressure, 300 bar intermittent pressure, and 420 bar peak pressure.

MR series motors are renowned for their high efficiency, high starting torque, excellent low-speed performance, and extended service life, achieving mechanical efficiency up to 96% and volumetric efficiency up to 99%. Minimum stable speed reaches 0.5 rpm, with starting torque up to 95% of theoretical value.

Designed as a 100% interchangeable direct replacement for original Parker Calzoni MR series motors, this product matches OEM specifications in mounting dimensions, porting interfaces, and performance characteristics. Every unit undergoes 100% simulated duty cycle testing prior to shipment, validating volumetric efficiency, mechanical efficiency, and sealing integrity under actual operating load conditions.

Technical Specifications 

MR2800I-F1N1N1S2NX CM24-2800

• Model: MR2800I-F1N1N1S2NX CM24-2800

• Brand: Parker Hannifin Calzoni Series

• Product Type: Fixed Displacement Radial Piston Hydraulic Motor

• Displacement: 2792 cc/rev

• Rated / Continuous Pressure: 250 bar (3,625 psi)

• Intermittent Pressure: 300 bar (4,350 psi)

• Peak Pressure: 420 bar (6,090 psi)

• Maximum Speed: 215 RPM

• Minimum Speed: 0.5 RPM

• Rotation Direction: Clockwise

• Shaft Type: Male spline DIN 5463

• Connection Type: Six-bolt connection

• Flange Size: 335 h7

• Seal Material: Buna-N

• Speed Feedback Option: None

• Control Type: Fixed Displacement

• Circuit Type: Open circuit / Closed circuit

MR Series – Full Model Range (Typical Displacements)

MR600: 600–800 cc/rev (medium displacement)
MR700: 700–900 cc/rev (medium displacement)
MR1100: 1100–1400 cc/rev (medium-large)
MR1600: 1600–2000 cc/rev (large)
MR1800: 1800–2300 cc/rev (large)
MR2400: 2400–3000 cc/rev (extra-large)
MR2800: 2792–3000 cc/rev (extra-large)
MR3600: 3600–4500 cc/rev (extra-large)
MR4500: 4500–5500 cc/rev (extra-large)
MR6500: 6500–8000 cc/rev (ultra-large)
MR7000: 7000–9000 cc/rev (ultra-large)

Key Technical Advantages

1. Unique Fluid Column Technology for Ultra-High Efficiency

Parker Calzoni MR series employs unique fluid column technology specifically engineered for high mechanical and volumetric efficiency across a wide range of speed and torque. Mechanical efficiency reaches up to 96% and volumetric efficiency up to 99%. This technology minimizes internal friction and leakage, ensuring stable and efficient operation during prolonged continuous duty.

2. Exceptional Low-Speed Performance with High Starting Torque

MR series motors operate smoothly at minimum speeds as low as 0.5–1 rpm, with starting torque up to 95% of theoretical value. This makes them ideal for applications requiring precise positioning and heavy-load start-up—such as winch constant tensioning and slew drive positioning.

3. High Pressure Rating with High Torque Output

The MR2800I delivers 250 bar rated pressure, 300 bar intermittent pressure, and 420 bar peak pressure. With a compact 2792 cc/rev displacement package, it achieves exceptional torque density—meeting the most demanding heavy machinery applications.

4. 100% Interchangeability – Zero-Modification Drop-In Replacement

Manufactured to exact OEM mounting dimensions, porting specifications, and performance standards, this motor achieves 100% interchangeability with original Parker Calzoni MR series units. No machine modifications are required—simply replace and resume operation, minimizing downtime and reducing maintenance costs.

5. 100% Simulated Duty Cycle Testing for Extreme Environment Reliability

Every motor undergoes 100% simulated duty cycle testing before shipment, validating performance under rated, intermittent, and peak pressure conditions—ensuring long-term reliability in demanding marine, mining, construction, and industrial applications.

6. Robust Construction with Extended Service Life

MR series features roller bearing design for extremely long service life. High resistance to thermal shocks, wide operating temperature range, and broad fluid compatibility enable reliable operation across extreme environments. A full range of parking brakes is available.

7. Very Low Noise Operation with Reversible Capability

MR series motors deliver very low operating noise levels. Reversible operation (motor and pump) is supported, enhancing system design flexibility.

Application Areas

• Winches & Hoisting: Marine anchor windlasses, offshore platform winches, constant tension winches

• Injection Molding: Screw drives

• Travel Drives: Construction equipment wheel drives, tracked travel mechanism drives

• Slew Drives: Crane swing drives, excavator swing drives

• Marine & Offshore: Steerable thrusters, jack-up systems

• Recycling & Shredding: Shredder drives

• Mining Equipment: Mining and construction machinery hydraulic drives

• Industrial Equipment: Heavy industrial machinery hydraulic transmissions

Expert Maintenance Tips

1. Pre-Installation Preparation: Before using the MR series motor, read and understand the complete Parker Calzoni technical manual. For first commissioning, fill the motor housing with hydraulic fluid using a filling unit with filtration not less than 10 µm. Never operate the motor without fluid.

2. Case Drain Line Orientation: MR series motors are sensitive to housing backpressure. Ensure the case drain line is unobstructed and returns to a separate oil tank to prevent seal damage from excessive housing pressure.

3. Cooling Flow Requirements: MR series motors require adequate cooling flow during continuous high-power operation. Ensure the system design meets the motor’s cooling requirements to prevent overheating and internal wear.

4. Minimum Speed Considerations: MR series motors operate at minimum speeds as low as 0.5 rpm. During ultra-low-speed operation, ensure smooth loading and avoid shock loads that could damage the motor.

5. Oil Cleanliness Control: Recommended system filtration not less than ISO 4406 18/13. Regular oil analysis is recommended with filter change intervals adjusted based on contamination levels.

6. Seal Selection: MR series offers multiple seal options. Standard configuration uses Buna-N. For high-temperature or special fluid applications, select FKM (Viton) seals.

7. Regular Inspection Schedule: Regular inspection of the hydraulic system and motor is recommended. Check hydraulic fluid level daily and monitor operating temperature, noise levels, and case drain flow regularly. Abnormal increases may indicate internal wear or seal degradation.