Heavy-Duty Gear-Rack Oscillating Hydraulic Cylinder

Photo of the Heavy-Duty Gear-Rack Oscillating Hydraulic Cylinder

Heavy-Duty Gear-Rack Oscillating Hydraulic Cylinder

Overview
A gear-rack rotary hydraulic actuator converts hydraulic energy into oscillating or angular motion. The linear reciprocating motion of the hydraulic cylinder drives the rack, which engages with the pinion gear to generate bidirectional rotation. The cylinder force is mechanically amplified into torque through the rack-and-pinion transmission, and the swing angle is proportional to the rack stroke, achieving 0°–720° rotation.
The actuator consists of a pinion shaft, rack piston, cylinder body, and sealing system. Common mounting types include flange and foot mounting. Structural types include single-rack and double-rack designs, available in multiple series and sizes to meet different torque requirements. End-of-stroke cushioning (approx. 15° per end) ensures smooth operation.

Key Performance Advantages
1. High Torque Output
Torque is proportional to working pressure, and with the mechanical amplification of the rack-and-pinion system, the actuator can deliver up to 1,150,000 Nm (e.g., UBZ320). Suitable for heavy-duty industrial applications.

2. Precision Control
With optional rotary encoders or displacement sensors, the actuator forms a closed-loop servo system:

Product Examples:
1. Heavy-Duty Swing Cylinder UBZJK250/185HBM
- Bore : 250 mm - Angle: 185 - Mounting Method: Foot Bracket
- Type: Double Rack - Output : Splined Bore INT60zX6mX30PX6H
- End Cushioning Angle: 12° - Torque: 40,996 Nm
- Rated Pressure: 25 MPa - Test Pressure: 31.5 MPa - Working Fluid: Water-Glycol



2. Vehicle Transfer Platform Heavy-Duty Swing Cylinder UBZFZ90-180°
- Bore : 90 mm - Angle: 180° -External Rotary Encoder
- Mounting Method: Foot Bracket - Type: Double Rack
- Output : Splined Shaft EXT60ZX3mX30RX5h (GB/T3478.1-1995)
- Rated Pressure: 31.5 MPa - Test Pressure: 35 MPa - Rated Pressure Output Torque: 50,250 Nm



3. **Fin Stabilizer Servo Swing Cylinder UBFZS200-130°
- Bore : 200 mm - Angle: 130° - Mounting Method: Flange - Type: Double Rack
- Output : Splined Shaft EXT40ZX5mX30RX6f
- Backlash ≤ 0.02 mm - Repeatability ≤ 0.05° - End Cushioning Angle: 5
- Rated Pressure: 25 MPa - Test Pressure: 31.5 MPa - Torque: 201,056 Nm



4、Heavy-duty oscillating cylinder UBZJK280/125HBM
Bore : 280 mm angle: 125°Terminal buffer angle: 12° (both ends)
Connection type: Foot bracket Structure type: Double rack
Output type: Spline shaft INT50ZX8mX30RX6H Rated torque output: 778,000 N·m
Rated pressure: 21 MPa Test pressure: 31.5 MPa Working medium: HFDU46 hydraulic fluid