ITM16-2000 Five Star Hydraulic Motor 2035cc 22.5MPa

Product Overview

The ITM16-2000 is a core large-displacement model within the ITM16 Series of Five Star hydraulic motors, belonging to the crankshaft connecting rod type radial piston hydraulic motor product line. The motor features a five-cylinder five-piston low excitation frequency crankshaft mechanism with a displacement of 2035 ml/r, rated torque of 5416 N·m, rated pressure of 18 MPa, and peak pressure of 22.5 MPa. It is specifically designed for heavy-duty hydraulic transmission applications including injection molding machine screw drives, mining and construction equipment, cranes, marine machinery, and more.

The ITM Series hydraulic motors are traditional radial piston motors produced domestically using imported technology. They match imported motors in both external dimensions and performance characteristics, and can directly replace STAFFA HMB/HMC Series, DENISON CALZONI MR/MRE Series, and JM, JMD, NHM and other brand Five Star motors. This drop-in interchangeability enables users to complete replacement without modifying mounting interfaces or hydraulic circuits, significantly reducing equipment maintenance and upgrade downtime costs.

The core engineering features of the ITM16-2000 are defined by four factors: it employs a crankshaft and low excitation frequency five-cylinder five-piston mechanism with low noise characteristics; it delivers high starting torque with excellent low-speed stability, effectively overcoming pulsation at low speeds for smooth low-speed operation; it adopts an advanced plane compensable distribution structure that brings all moving parts to a state of perfect balance, further improving volumetric efficiency; and its crankshaft and connecting rods are supported by rollers for very high mechanical efficiency.

The motor’s output shaft allows a certain degree of radial and axial force, with a high power-to-weight ratio, relatively small volume and weight, and convenient installation and maintenance. The product is widely used in hydraulic transmission systems for mining and construction, engineering machinery, lifting equipment, petroleum and coal mining machinery, marine machinery, plastic machinery, and geological drilling. It is particularly suitable for injection molding machine screw drives, lifting winch and drum drives, various slewing mechanism drives, and crawler and wheel travel mechanism drives.

As a drop-in replacement, the ITM16-2000 is fully compatible with the above imported brand specifications in mounting interface, shaft end configuration, and performance characteristics. Every unit undergoes 100% simulation-based testing prior to shipment, covering displacement calibration, torque output, pressure holding, and internal leakage.

Technical Specifications

All parameters below are based on verified supplier technical pages (bmlink.com, sdtjpj.com, bf-z.com, etc.) and industry-standard specifications:

• Complete Model: ITM16-2000

• Product Series: ITM16 Series Five Star Hydraulic Motor

• Product Type: Crankshaft connecting rod type radial piston fixed displacement hydraulic motor

• Structure: Five-cylinder five-piston, crankshaft connecting rod mechanism

• Theoretical Displacement: 2035 ml/r (2034 ml/r, slight variation between sources)

• Rated Pressure: 18 MPa (180 bar / 2610 psi)

• Peak Pressure: 22.5 MPa (225 bar / 3263 psi)

• Rated Torque: 5416 N·m

• Unit Theoretical Torque: 301 N·m/MPa

• Maximum Speed: 250 rpm

• Speed Range: 2 – 250 rpm

• Maximum Power: 75 kW

• Distribution Method: Plane compensable distribution structure

• Direction of Rotation: Bidirectional reversible (change hydraulic oil flow direction to reverse)

• Mounting: Flange mounting (standard mounting dimensions)

• Weight: Approx. 155 kg

• Hydraulic Fluid: Mineral oil-based hydraulic fluid

• Application Conditions: Medium pressure, heavy load, low speed high torque continuous operation

ITM16 Series Other Model Specifications Reference:

• ITM16-1400: Displacement 1413 ml/r, rated pressure 16 MPa, peak pressure 22 MPa, rated torque 3343 N·m, unit torque 209 N·m/MPa, max power 74 kW, weight 170 kg, max speed 400 rpm

• ITM16-1600: Displacement 1648 ml/r, rated pressure 16 MPa, peak pressure 22 MPa, rated torque 3899 N·m, unit torque 244 N·m/MPa, max power 87 kW, weight 170 kg, max speed 400 rpm

• ITM16-1800: Displacement 1814 ml/r, rated pressure 16 MPa, peak pressure 20 MPa, rated torque 4292 N·m, unit torque 268 N·m/MPa, max power 84 kW, weight 170 kg, max speed 400 rpm

• ITM16-2400: Displacement 2267 ml/r, rated pressure 14 MPa, peak pressure 18 MPa, rated torque 4693 N·m, unit torque 335 N·m/MPa, max power 75 kW, weight 170 kg, max speed 400 rpm

Note: The ITM16 Series includes five displacement specifications: 1400, 1600, 1800, 2000, and 2400. Technical parameters may vary slightly between suppliers in rated pressure, rated torque, and maximum speed. Always verify against the actual supplier’s technical documentation during selection. This series is fully interchangeable with STAFFA HMB/HMC, DENISON MR/MRE, and JM, JMD, NHM series Five Star motors in both external dimensions and performance characteristics.

Key Technical Advantages

1. Five-Cylinder Five-Piston Crankshaft Mechanism for Low Vibration and Low Noise

The ITM16-2000 employs a crankshaft and low excitation frequency five-cylinder five-piston mechanism. Compared with conventional Five Star motor layouts, the symmetrical crankshaft design of the five-cylinder five-piston configuration effectively reduces the excitation frequency during operation, enabling the motor to maintain low noise levels even under high-pressure large-displacement operating conditions. This design is particularly important for applications such as injection molding machines where noise control is a consideration.

2. High Starting Torque with Excellent Low-Speed Stability

The motor delivers high starting torque with excellent low-speed stability, effectively overcoming pulsation at low speeds for smooth low-speed operation. In applications such as injection molding machine screw drives and winch lifting that require frequent loaded starting, this characteristic ensures the equipment can output sufficient torque immediately upon startup, avoiding the startup lag and crawling phenomena common in conventional motors.

3. Plane Compensable Distribution Structure for High Volumetric Efficiency

The ITM16-2000 adopts an advanced plane compensable distribution structure that brings all moving parts to a state of perfect balance, further improving volumetric efficiency, ensuring smoother operation, less leakage, and higher reliability. The compensable distribution plate automatically compensates for wear clearance during long-term operation, maintaining distribution precision stability and extending motor service life.

4. Roller-Supported Crankshaft Connecting Rods for High Mechanical Efficiency

The motor’s crankshaft and connecting rods are supported by rollers, delivering very high mechanical efficiency. Compared with sliding bearing support, the roller support structure has a lower friction coefficient, effectively reducing power loss and heat generation under high-load continuous operation, improving overall machine efficiency.

5. Broad Imported Brand Drop-In Interchangeability

The ITM16-2000 matches STAFFA HMB/HMC Series, DENISON CALZONI MR/MRE Series, and JM, JMD, NHM and other brand Five Star motors in both external dimensions and performance characteristics. Users can directly replace the above imported brand motors of the same specification with the ITM16-2000 without modifying hydraulic circuits, mounting interfaces, or control wiring. The product is widely used as an OEM and replacement part for injection molding machines from Chen Hsong, Haitian, Haida, and other brands.

Application Areas

• Injection Molding Machine Screw Drives: Replacement and repair of injection molding machine plasticizing motors for Chen Hsong, Haitian, Haida, and other brands — one of the most core applications of the ITM16-2000

• Mining & Construction Machinery: Slewing and travel drive systems for roadheaders, rotary drilling rigs, and roof bolters

• Engineering Machinery: Crane hoisting and slewing mechanisms, compactor travel drives, crawler drive systems

• Marine Machinery: Deck machinery, winches, and windlass hydraulic drive systems

• Petroleum & Coal Mining Machinery: Underground transport vehicle and drilling rig hydraulic transmission systems

• Plastic Machinery: Screw and drum drives for injection molding and extrusion machines

• Geological Drilling Equipment: Drilling rig rotary power heads and winch systems

• Metallurgical Equipment: Steel mill plate bending machines and rolling mill auxiliary transmission systems

Expert Maintenance Tips

Pre-Installation Checks:

• Verify mounting flange dimensions match the equipment interface (identical to STAFFA HMB/HMC and DENISON MR/MRE series mounting dimensions)

• Inspect output shaft spline or keyed mating surface for wear or corrosion; apply appropriate grease

• The motor should be filled with clean hydraulic oil via the case drain port prior to installation to prevent dry friction on piston/cylinder during startup

• Confirm port seals are intact; tighten diagonally to specified torque

Operational Maintenance:

• Use pressure filters with ≤ 10 μm filtration accuracy; maintain hydraulic oil cleanliness to ISO 4406 18/16/13 or better

• Recommended fluid: mineral oil-based anti-wear hydraulic oil; replace filter elements and oil at regular intervals

• Maintain operating oil temperature within the recommended range; avoid overheating that degrades oil quality

• Periodically inspect motor exterior for leakage signs, focusing on shaft seal and port connections

• Periodically monitor motor operating temperature and noise level; abnormal increase may indicate internal wear or fluid contamination

• Case drain line should be connected independently to the reservoir; return back pressure must not exceed allowable limits

• Output shaft allows a certain degree of radial and axial force, but rated loads should not be exceeded

Troubleshooting Guide:

• Motor fails to rotate or speed abnormal: Check hydraulic system supply pressure; verify directional valve operation; check oil cleanliness

• Insufficient output torque: Confirm system pressure reaches rated value (18 MPa continuous / 22.5 MPa peak); inspect pistons and cylinder bores for wear

• Abnormal noise or vibration: Check case oil fill level; verify suction line is unobstructed; check mounting bolt tightness

• External leakage: Inspect shaft seal for aging or damage; verify case drain line back pressure is within allowable range

• Unstable low-speed operation: Check oil viscosity and cleanliness; verify distribution plate wear and compensable adjustment requirement