ITM16 Series STF Star Plunger Motor High Torque Radial Piston

Product Overview:

The ITM16 series (ITM16-1400, ITM16-1600, ITM16-1800, ITM16-2000, ITM16-2400) and ITM03-300B are STF Star Plunger (radial piston) hydraulic motors. Featuring a crankshaft-connecting rod mechanism combined with a five-cylinder five-plunger design, they deliver high starting torque and excellent low-speed performance for smooth, reliable operation even at extremely low speeds. The plane-compensating oil distribution structure provides reliable sealing, low internal leakage, and easy maintenance. Bi-directional rotation is supported, and the output shaft can withstand certain axial and radial external loads. Precision-machined and 100% tested under simulated operating conditions, these motors offer full interchangeability as direct replacements for equivalent original radial piston motors in medium-pressure industrial drive systems.

Technical Specifications 

• Models: ITM16-1400 / ITM16-1600 / ITM16-1800 / ITM16-2000 / ITM16-2400 / ITM03-300B (ITM03-300)
• Theoretical displacement: ITM16-1400: 1413 ml/r; ITM16-1600: 1648 ml/r; ITM16-1800: 1814 ml/r; ITM16-2000: 2034 ml/r; ITM16-2400: 2267 ml/r; ITM03-300: 289 ml/r
• Rated pressure: ITM16-1400/1600: 16 MPa; ITM16-1800: 16 MPa; ITM16-2000/2400: 14 MPa; ITM03-300: 14 MPa
• Maximum/peak pressure: ITM16-1400/1600: 22 MPa; ITM16-1800: 20 MPa; ITM16-2000/2400: 18 MPa; ITM03-300: 18 MPa
• Rated torque: ITM16-1400: 3343 N·m; ITM16-1600: 3899 N·m; ITM16-1800: 4292 N·m; ITM16-2000: 4211 N·m; ITM16-2400: 4693 N·m; ITM03-300: 592 N·m
• Specific torque: ITM16-1400: 209 N·m/MPa; ITM16-1600: 244 N·m/MPa; ITM16-1800: 268 N·m/MPa; ITM16-2000: 301 N·m/MPa; ITM16-2400: 335 N·m/MPa; ITM03-300: 42 N·m/MPa
• Maximum speed: ITM16-1400/1600: 250 r/min; ITM16-1800: 220 r/min; ITM16-2000: 200 r/min; ITM16-2400: 180 r/min; ITM03-300: 280 r/min
• Rated output power: ITM16-1400: 74 kW; ITM16-1600: 87 kW; ITM16-1800: 84 kW; ITM16-2000: 75 kW; ITM16-2400: 75 kW; ITM03-300: 15 kW
• Weight: ITM16-1400 approx. 170 kg; other models per manufacturer data; ITM03 series from approx. 36 kg
• Control/structure: Fixed displacement, plane-compensating distributor, crankshaft + radial plunger, bi-directional

(Data extracted from published STF ITM series technical parameter tables.)

Key Technical Advantages:

1. Crankshaft-connecting rod with five-cylinder five-plunger design effectively reduces excitation frequency, maintaining low-noise operation ideal for noise-sensitive industrial environments.
2. Plane-compensating distributor delivers excellent sealing, minimal internal leakage, high volumetric efficiency, reliable construction, and quick, simple maintenance.
3. High starting torque combined with outstanding low-speed stability ensures smooth and reliable output even at extremely low speeds.
4. Output shaft tolerates defined axial and radial external loads; bi-directional capability; precision machining plus 100% simulated duty testing guarantee interchangeability and extended service life.

Application Areas:

Injection molding machines (plastic processing), winches, coal-mining equipment, construction machinery drives, marine deck machinery, and other medium-pressure hydraulic systems requiring low-speed high-torque radial piston motors.

Expert Maintenance Tips:

Before installation, ensure mounting surfaces are clean and bolt torques match the manufacturer’s specifications; verify shaft alignment to avoid excessive radial loading. Check system cleanliness and oil viscosity (use recommended hydraulic fluid) prior to first operation. Periodically inspect distributor sealing surfaces and bearing lubrication. Avoid prolonged operation beyond rated pressure or speed. Use OEM-specification seals during service; after replacement, perform low-pressure break-in before returning to rated conditions. Always refer to official STF dimensional drawings for mounting and port orientation.