TPMB-321 insert made from T-15 high speed steel, combine the advantages of high-speed steel cutting tools with the convenience of indexable tooling. Insert is a 60° triangle with a 11° relief. The center hole is a 70°-90° single countersink, and there is no chip breaker. It has an inscribed circle (IC) of 0.375" (3/8"), a thickness of 0.125" (1/8"), and a corner (nose) radius of 0.0156" (1/64"). The insert is designated TPMB321 (ANSI) or TPMB160304 HSS (ISO). This high-quality insert is made in America by the Arthur R Warner company. Inserts are sold individually—no need to buy a pack of 10 inserts. *NOTE: Make sure you get the correct inserts and retaining screws for your indexable turning tools. Our chart of indexable inserts shows which inserts and which screw to use with each of our indexable tools.
