HEJ 90

HEJ 90 is maxon’s integrated robotic joint for legged robots, manipulators and other articulated systems. The 2-kilogram module combines a brushless motor, planetary gearbox, output bearing, encoders, electronics and housing in a 110-millimetre-diameter assembly. It provides 75 newton-metres of continuous torque, 140 newton-metres peak torque and joint velocity up to 10 radians per second.

The joint accepts a 20–60 V supply and communicates over EtherCAT at rates up to 1 kHz. Position, velocity, torque, motor-current and impedance modes are handled by the integrated controller, while IP67 protection supports exposed robotic installations. Radial- and axial-connector versions preserve the same HEJ 90 mechanical and performance scope.