SteadyArc 40

The SteadyArc 40 is the dependable single-axis choice for K1–K2 transfemoral patients who walk at one comfortable speed and need the knee to simply keep up. Constant friction smooths swing without electronics or fluid service, and an internal extension-assist spring brings the shank forward reliably for low-energy walkers.

Friction is set with a single accessible screw on a bronze-bushed steel axis, housed in a forged aluminum frame with a standard 4-hole proximal plate and 30 mm distal tube clamp. The knee weighs 520 g, offers 130 degrees of flexion, and carries a 125 kg rating.