Spiral Rotary Actuators .

Hydraulic spiral rotary actuators — HBL, HBM, HBH, HBT, HBK and HBP series with 100+ specifications. Convert linear piston motion into rotation through helical spline pairs: compact envelope, equal torque in both directions, holding torque 2× the rated value, integrated axial and radial bearings. Used in industrial robotics, lift-and-rotate tables, valve and gate drives, heavy manipulator rotation.