ME1300APS2472 SAI Hydraulic Motor 1345cc 250 bar LSHT

Product Overview

The ME1300APS2472 is a crankshaft radial piston hydraulic motor built on the SAI Hydraulics ME series platform, in the ME1300 displacement size (1345 cm³/rev). SAI Hydraulics, founded in Modena, Italy in 1964, is a global leader in the design and production technology of crankshaft radial piston hydraulic motors. The ME series motors are widely used in agriculture, shipbuilding, drilling, earth moving, oil & gas, renewable energies, and heavy industries.

The ME1300 belongs to the Eaton/Danfoss DOWMAX® ME series family, which covers ME100, ME150, ME175, ME300B, ME350B, ME600B, ME750B, ME850B, ME1300A, ME1900, ME2600, ME3100, and ME4100 displacement sizes. The ME1300APS2472 delivers a displacement of 1345 cm³/rev, rated pressure of 24.5 MPa (250 bar), peak pressure of 31.9 MPa (325 bar), rated torque of 5250 N·m, rated speed of 200 rpm, maximum speed of 390 rpm, maximum output power of 138 kW (188 HP), and weight of approximately 179 kg.

The model code ME1300APS2472 decodes as follows: ME1300 is the series displacement code (approximately 1300 cm³/rev class), A is the design code, PS is the mounting flange and shaft configuration code, and 2472 is the special option code (potentially relating to seal material, port configuration, or surface treatment). Specific suffix meaning should be confirmed through the manufacturer’s complete selection manual.

Engineered as a form-fit-function replacement for original SAI Hydraulics ME1300 series motors, this model maintains identical mounting flange dimensions, shaft specifications, and port locations, enabling drop-in interchangeability. Each unit undergoes 100% simulated load testing prior to shipment, validating output torque and volumetric efficiency against original specifications.

Technical Specifications 

• Model: ME1300APS2472

• Series: SAI Hydraulics ME Series Crankshaft Radial Piston Motor

• Motor Type: Crankshaft radial piston hydraulic motor

• Design Feature: Crankshaft configuration, swivelling cylinder, axial flow rotary distributor

• Displacement: 1345 cm³/rev (82.1 in³/rev)

• Rated Pressure: 24.5 MPa (245 bar / 3,553 psi)

• Peak Pressure: 31.9 MPa (319 bar / 4,626 psi)

• Rated Torque: 5250 N·m (3,873 lb-ft)

• Rated Speed: 200 rpm

• Maximum Speed: 390 rpm

• Maximum Output Power: 138 kW (188 HP)

• Rotation: Bi-directional

• Mounting: Flange mounting

• Weight (approx.): 179 kg (395 lb)

• Back Pressure Capability: Can be connected in series with other motors or hydraulic components

Key Technical Advantages

1. Crankshaft Radial Piston Design with High Starting Torque

The ME1300APS2472 employs SAI’s unique crankshaft design, the culmination of over six decades of radial piston motor technology development. The crankshaft configuration converts the radial motion of the pistons into rotational output through an eccentric crankshaft, with no difference between starting torque and running torque, capable of delivering maximum torque at zero speed and stall conditions. This design enables smooth operation at speeds below 1 rpm without stick-slip or speed fluctuation.

2. Swivelling Cylinder and Axial Flow Rotary Distributor

Key features distinguishing SAI motors from other radial piston motors include: Swivelling Cylinder, Double Piston Support Bearing, Axial Flow Rotary Distributor, and Interchangeable Distributor. The swivelling cylinder design allows the cylinder block to self-align during porting, reducing the risk of uneven wear. The axial flow rotary distributor achieves continuous and smooth fluid distribution, reducing pressure pulsation and noise levels.

3. High Volumetric Efficiency and Contamination Resistance

SAI motors achieve volumetric efficiency up to 99.9%, making them highly suitable for precision equipment manufacturing. The special design ensures high resistance to fluid contamination. SAI motors are capable of hot oil starting under continuous cavitation conditions, with excellent thermal shock resistance, operating at temperatures up to 120°C and allowing hot oil starting in cold environments. These characteristics make the ME1300APS2472 particularly suitable for demanding heavy-duty applications in mining and metallurgy where fluid conditions may be relatively harsh.

4. Compact High Power Density with Back Pressure Series Capability

The ME1300APS2472 achieves a maximum output power of 138 kW and rated torque of 5250 N·m at a weight of 179 kg, offering an excellent power-to-weight ratio. The motor has strong back pressure withstand capability, allowing it to be connected in series with other motors or hydraulic components, simplifying complex hydraulic circuit design. SAI strives to transform the traditional “low speed high torque” concept into “high speed high torque,” with the ME series motor achieving a maximum speed of 390 rpm, representing a significant improvement over conventional LSHT motors.

Application Areas

• Marine & Offshore: Deck cranes, windlasses, winches, hatch cover drive mechanisms, offshore and subsea equipment

• Construction Machinery: Tunnel boring machines, heavy-duty conveyors, mining machinery, rock crushers

• Metallurgy & Heavy Industry: Steel mill drives, heavy-duty rotary actuators

• Oil & Gas: Onshore and offshore drilling equipment, workover equipment

• Renewable Energy: Large-scale hydraulic drive systems

• Agricultural Machinery: Heavy-duty agricultural drive systems

SAI is an official supplier to NATO and the British Royal Navy, and has long-term partnerships with Caterpillar, Marini, Volvo, and Bitelli construction machinery, as well as being a leading radial piston motor supplier to TTS shipbuilding.

Expert Maintenance Tips

1. Shaft Alignment Requirements: The crankshaft radial piston motor’s output shaft accommodates combined radial and axial loads. During installation, ensure the coaxiality deviation between the motor shaft and drive-end coupling does not exceed 0.05 mm. Excessive radial forces will accelerate bearing wear and shaft seal aging.

2. Hydraulic Fluid Cleanliness Control: Although SAI motors offer excellent contamination resistance, maintaining hydraulic fluid cleanliness at NAS Level 9 or better is recommended. Replace hydraulic fluid and filter elements every 1,000 operating hours or annually, with filter element filtration accuracy no less than 10 μm.

3. Thermal Shock Management: SAI motors can operate at temperatures up to 120°C and allow hot oil starting. During cold starts, run at low pressure (10 MPa) under no load for 10 minutes until case temperature is uniform before gradually applying load, avoiding excessive thermal stress on piston pairs.

4. Back Pressure Control and Series Operation: When the motor is used as a downstream component in a series system, ensure the return back pressure from upstream components does not exceed the motor’s allowable back pressure. The drain port must be connected separately to the reservoir with back pressure not exceeding 0.5 MPa.

5. Restart After Extended Storage: For motors stored over 6 months, manually rotate the shaft 2–3 revolutions to confirm free rotation, then run at low pressure under no load for 10 minutes, confirming normal case temperature and leakage before gradually applying load.