SCARA Arms, short for Selective Compliance Assembly Robot Arm or Selective Compliance Articulated Robot Arm, are four-axis industrial robots featuring two parallel rotary joints that provide high rigidity and speed in the horizontal plane, along with a vertical Z-axis and theta rotational axis at the tool shaft. Designed specifically for rapid pick-and-place, assembly, and packaging tasks, these robots deliver exceptional cycle speeds with millimeter-level accuracy. Key hardware features typically include rigid horizontal inner and outer arm links, high-torque servomotors, a ground ball screw and spline combination shaft, integrated pneumatic pass-through ports, and absolute encoder feedback systems.