High Torque in a Compact Envelope #
ASHUN’s RA Series hydraulic rotary actuators integrate precision double-helix spline technology with a zero-leakage, high-rigidity structure. The design converts linear hydraulic motion into rotary output, delivering high torque within a small installation envelope for construction machinery, marine environments and advanced automation.
Official category page: Hydraulic Rotary Actuators
Design Features #
- High power density and compact footprint — Precision double-helix spline technology outputs high torque from a minimal package for confined installation spaces.
- Integrated high-load and anti-side-load structure — Combines rotational force with structural support, withstanding high radial loads and bending moments without external bearings.
- Zero internal leakage and precise position locking — The sealing system enables accurate, drift-free load holding without an external mechanical brake.
- Ultra-low backlash — Jerk-free, uniform bidirectional rotation for precise angle micro-adjustments.
- High customizability — Standard 180° and 360° rotation, with customizable angles, shaft ends, mounting flanges and integrated load-holding safety valves.
Product Series #
- RA10 Series — Designed for automation equipment and machinery with constrained installation space. Precision double-helix meshing converts linear motion into rotary power, providing load capacity and positioning performance for compact mechanisms.
- RA20 Series — Supplied with a highly rigid LA foot mount for installation flexibility. The design supports both flange (cantilever) and bracket (straddle) integration and provides stable drive power for medium-to-heavy automation systems.
- RA30 Series — Engineered for demanding heavy-duty environments with both FA front flange and LA foot mount configurations. Provides reliable actuation for mining, construction and heavy engineering machinery.
Typical Applications #
- Tiltrotators, grapples and steering systems on construction machinery
- Aerial work platforms and crane booms requiring multi-angle positioning
- Radar antennas, military hatches and ground support equipment
- Heavy robotic joints, automated turntables and AGV mechanisms