Abstract: An indexing and rotational feed control apparatus for a rotationally mounted spindle holding a work piece includes an indexing housing connected to the spindle and carrying an indexing finger is rotatably mounted relative to an indexing plate such that rotation of the indexing wheel provides sequential releasably fixed rotation of the spindle between angularly indexed positions. The indexing plate is connected to a shaft which in turn is connected to a rotary actuator such that rotation of the actuator permits precise rotation of the indexing wheel and indexing housing in either direction without disturbing the releasably fixed indexed position between the spindle and indexing wheel as set by the releasably fixed engagement between the indexing finger and the indexing wheel.

Abstract: An improved counterbore end cutting tool characterized by a unique construction wherein the shank driver, the cutting head, and the pilot shank are removably mounted together. Additionally, the cutter head is manufactured in a manner to provide a novel reversible feature which permits it to be reversed to cut from either end. The cutting head and the holder include a novel driving connection feature wherein the teeth at one end of the cutting head which are not being used, mate with appropriate recesses in the holder to provide the driving connection between the holder and cutting head.