Tool for parting and grooving

A tool comprising:

• a holder including a holder surface, and a plurality of threaded holes extending into the holder surface;
• an adapter mounted on the holder, the adapter being thinner than the holder and including a front slot adapted to receive a cutting insert, the adapter comprising:
• an adapter surface opposing the serrated holder surface, the holder surface and the adapter surface including serrations arranged in intermeshing relationship to provide a torque-resistant connection between the adapter and the holder,
• a front slot adapted to receive a cutting insert, the front slot formed between a support portion and a clamp portion of the adapter, the clamp portion forming a portion of the slot,
• a plurality of through-holes extending through the adapter and aligned with respective ones of the threaded holes, and
• a rear slot extending through one of the through-holes , wherein the clamp portion extends forwardly from the rear slot, the torque-resistant connection being absent from the clamp portion to render the clamp portion elastically movable relative to the holder, the first through-hole having a conical entry surface;
• and
• fastener screws extending through respective ones of the through-holes and threaded in respective ones of the threaded holes for securing the adapter to the holder, a first of the screws extending through the torque resistant connection, and a second of the screws extending through the one through-hole and including a conical head engaging the conical entry surface such that a tightening of the second screw displaces the clamp portion toward the support portion.