Our hydraulic rotary actuator with high-precision gear transmission features a rack-pinion mechanism with ground gears (grade 4 accuracy) for minimal backlash (<0.05°). The design uses a dual-rack configuration to double torque output while maintaining smooth rotation. The gear teeth undergo carburizing (60-62 HRC) and superfinishing (Ra ≤0.1μm) to reduce friction and wear. With torque outputs up to 80,000 N·m and rotation speeds to 200 RPM, it suits precision applications like CNC rotary tables and robotic welding arms. A built-in backlash adjustment mechanism ensures consistent performance over 100,000 cycles. The housing is constructed from nodular cast iron (QT800-2) for rigidity, while the output shaft is induction-hardened (depth 2 mm, 58 HRC). Contact us for gear transmission efficiency charts or view 3D models at [https://www.uranustj.com/].