Rotary Adaptors - KX Series The KX series from SMC are rotary one-touch fittings with a double ball race bearing for high speed applications. This series is suitable for vacuum or pressure applications, applicable to use for oscillating and rotating sections in robots. Ball race bearing for oscillating or 360° rotating applications One-touch collet includes anti tube-rotation mechanism Maximum rotational speed 1200rpm Low torque rotation style Copper-free specifications Electro less nickel plated stud