Threading Tool, Internal, 3/8" Indexable, HSS Triangle Inserts, A R Warner Kit #19

This Arthur R. Warner Co. boring bar for single-point cutting internal threads has 0.375" shank and is 5" long.

This tool requires a 0.5" minimum hole size.

Uses TPMW-1.8-1.5-.5 and TPMW-1.8-1.5-1 inserts.

The maximum thread depth is 0.100".

The Arthur R. Warner Co. is a family-owned American manufacturer of high speed steel products with specialization in cutting, shaping, pre-grinding, heat treating, and finish grinding of premium grades of flat high speed steel. Their quality is excellent and LittleMachineShop.com is proud to carry their products.

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.

Here's a video that talks about high speed steel tooling.

This tool ships with two kinds of inserts. The TPMC-32-NV insert is better in stainless and the TNMC-32-NV is better in alloy steels. You can use either for internal and external threading.

The difference is the relief angle. TPMC inserts have an 11 degree relief angle. TNMC inserts have a 0 degree relief angle.

We are big fans of High-Speed Steel. Find out why... What's So Good About High-Speed Steel?