Industrial robot that performs only linear motion in one axial direction, featuring a linear actuator or ball screw drive mechanism for dedicated linear movement. Specialized for conveying, positioning, pressing, and insertion operations, also used as single-axis components in XYZ table systems. Unlike articulated robots or SCARA robots, it has a structure specialized for high-precision linear motion control on a single axis. Available in servo motor drive, stepping motor drive, and pneumatic drive types, selected based on stroke length, payload capacity, and positioning accuracy.