Universal rotating chuck apparatus

A computer-controlled device for machining a plurality of workpieces of varying size comprising:

• a chuck positioned along a rotational axis and comprising a head and a plurality of protrusions that extend from the head and move inward and outward relative to the rotational axis;
• an inner shaft attached to the plurality of protrusions and driven by a first motor;
• an outer shaft attached to the head of the chuck and selectively coupled to the inner shaft, the outer shaft receiving torque from a second motor;
• and
• a first gear receiving torque from the first motor and a second gear coupled to the inner shaft and selectively aligned to the first gear,
• wherein rotation of the inner shaft positions the plurality of protrusions within the head of the chuck, wherein the position of the plurality of protrusions is programmable to a specific distance from the rotational axis to compress against and rotate the plurality of workpieces with varying levels of force, wherein the outer shaft rotates the chuck when the outer shaft is coupled to the inner shaft, and wherein the first gear is aligned with and transfers torque to the second gear when the outer shaft is de-coupled from the inner shaft.