An apparatus configured to convert a rotary machine to a non-rotary machine is provided. The apparatus may include a tool body that engages a rotary head of a CNC mill and a rotation restraint member that is fixed at a stationary position relative to a rotational axis of the rotary head. An arm of the tool body may engage the rotation restraint member to prevent rotation of the tool body. A cutting tool may be coupled to the tool body such that rotation thereof is also fixed. The arm of the tool body may include an elongated aperture that allows for slight pivoting of the tool body and the cutting tool to facilitate chip removal and cutting in opposing directions. Related methods are also provided.