Scientific Cutting Tools TM345-24A Thread Mill 7/16-24

Product Description

The SCIENTIFIC CUTTING TOOLS TM345-24A is a straight flute internal thread mill designed for cutting 7/16-24 UNS threads in a single helical pass. Built from submicron-grade solid carbide and coated with AlTiN+, it handles demanding threading operations in ferrous and non-ferrous materials where heat resistance and edge retention are critical. With 4 flutes and a 0.345-inch cutting diameter, it produces clean internal threads in blind or through holes. The 3/8-inch shank diameter suits standard milling chucks and collet holders. Licensed machinists and CNC operators working in production or job shop environments are the primary users of this tool.

This thread mill is intended for CNC machining centers performing internal thread milling on workpieces requiring 7/16-24 UNS thread forms. A thread mill offers advantages over tapping in hardened materials or applications where thread depth and position require tight control. The straight flute geometry and AlTiN+ coating make it suitable for dry or minimum-quantity lubrication (MQL) cutting strategies. It is commonly used in aerospace, automotive, and industrial fixture work where thread quality and tool life are priorities.

Key Features

• Straight flute design mills 7/16-24 UNS internal threads with 24 TPI
• Submicron-grade solid carbide substrate for rigidity and edge retention
• AlTiN+ coating provides heat resistance for dry or MQL cutting
• 4 flutes with 0.345-inch cutting diameter for clean thread form
• 0.809-inch length of cut accommodates standard thread depth requirements
• 3.5-inch overall length suits extended-reach setups in a variety of fixtures

Compatibility

Designed as an OEM-style thread mill for CNC machining centers equipped with a 3/8-inch collet or milling chuck, producing 7/16-24 UNS internal threads.

Installation Notes

Installation and operation of this tool should be performed by a qualified machinist or CNC operator. Secure the 3/8-inch shank in a properly sized collet or milling chuck torqued to the machine tool manufacturer's specification. Program the CNC controller for a helical interpolation path matching the 7/16-24 thread pitch before engaging the cut. Inspect the cutting edges for wear or chipping before each use and replace the tool if damage is detected.