Head stack assembly incorporating device, magnetic disk device manufacturing device, and method of manufacturing magnetic disk device

A magnetic disk device manufacturing device comprising an incorporating device configured to connect a head stack assembly to a base of a magnetic device by screwing a connector on a bottom surface of a rotational shaft of the head stack assembly and a connector on the base of the magnetic disk device together, wherein the incorporating device comprises

• a chuck configured to pinch the rotational shaft of the head stack assembly from an upper surface of the head stack assembly to be attached to the rotational shaft, and to rotate around a central axis of the rotational shaft, and
• a driving-force transmitter configured to transmit a rotational force to the chuck.

A method of manufacturing a magnetic disk device comprising incorporating a head stack assembly in order to connect the head stack assembly to a base of a magnetic disk device by screwing a connector on a bottom surface of a rotational shaft of the head stack assembly to a connector on the base of the magnetic device together, wherein the incorporating comprises:

• pinching the rotational shaft of the head stack assembly from an upper surface of the head stack assembly in order to attach a chuck to the rotational shaft, the chuck configured to rotate around a central axis of the rotational shaft, and
• generating a rotational force in order to rotate the chuck.