Yaskawa Electric Corporation HW0387809-A Gearbox

Manufactured by Yaskawa Electric (Motoman), the HW0387809-A is a precision speed reducer/gearbox designed for Axis 2 on Motoman MA01400 industrial robots, where it reduces speed while increasing joint torque to drive accurate, repeatable motion. This heavy-duty, machined housing unit is integrated into the robot arm joint assembly and is configured as a precision industrial reducer—the exact gear type (harmonic or planetary) depends on configuration—serving robotic motion control in welding cells, assembly lines, and material handling systems. Typical users include maintenance teams, OEMs, and integrators performing repair, replacement, or refurbishment to restore positioning accuracy; Axis 2 joint performance directly affects precision and repeatability. Availability is typically refurbished, surplus, or used, and common replacements include the HW0387809 series reducers (revision dependent), OEM Yaskawa Motoman Axis 2 gearboxes, and full robot joint rebuild assemblies.