Toolholder with a removable head

A toolholder apparatus for holding a cutting tool adjacent a workpiece having a rotational axis, comprising:

• a mounting block base adapted to be supported from a tool slide;
• a mounting block body slidably supported from the base;
• a first adjustable connector connecting the body and the base so that a position of the body on the base is adjustable in a first direction toward the workpiece upon rotation of the first adjustable connector;
• a center adjustment block slidably engaging the body;
• a second adjustable connector connecting the center adjustment block and the body so that a position of the center adjustment block on the body is adjustable in a second direction transverse to the first direction and transverse to the rotational axis of the workpiece;
• a head, detachably mounted on the center adjustment block, the head being removable from the center adjustment block by sliding movement in a third direction transverse to both of the first and second directions;
• and
• a cutting tool support attached to the head, so that the head and the cutting tool are removable from the apparatus to replace the cutting tool and then the head and the replacement cutting tool may be remounted on the apparatus.