The helical hydraulic rotary actuator from Tianjin Uranus converts linear piston motion into rotational output via a helical spline mechanism. This design offers zero backlash and high torque density (up to 1,500 N·m/diameter cm), ideal for precision applications like aerospace actuators and CNC rotary tables. The helical splines (lead angle 15-30°) are induction-hardened (depth 1 mm, 58 HRC), and the housing uses stress-relieved steel for durability. With rotation angles up to 360° and repeatability ±0.02°, it meets aerospace standards (ISO 10764). Contact us for helical spline design parameters or view aerospace application videos at [https://www.uranustj.com/].