Scientific Cutting Tools TM450-18A Thread Mill 9/16-18

Product Description

The SCIENTIFIC CUTTING TOOLS TM450-18A is a straight flute thread mill designed for cutting internal UNF threads in a 9/16-18 thread size. Built from submicron-grade solid carbide and finished with an AlTiN+ coating, this tool delivers consistent performance in demanding machining environments. With 4 flutes and a 0.45 inch cutting diameter, it is suited for precision thread milling operations on CNC machining centers. The 1/2 inch shank diameter and 3.5 inch overall length make it a practical choice for standard toolholding setups. Machinists and tool-and-die professionals working with ferrous and hardened materials will find the AlTiN+ coating particularly effective for extending tool life under elevated cutting temperatures.

This thread mill is intended for internal thread milling applications requiring a 9/16-18 UNF thread form. It is used in CNC machining operations across industries such as aerospace, automotive, and general manufacturing where precise internal threads are required. The straight flute geometry suits applications where a rigid cutting action is preferred. With a 1.134 inch length of cut, it handles common thread depth requirements for this thread size without extended-reach toolholding. No coolant-through capability is present, so external coolant or flood cooling is the typical approach during use.

Key Features

• Submicron-grade solid carbide construction for rigidity and wear resistance
• AlTiN+ coating for improved heat resistance and extended tool life in ferrous materials
• 4 straight flutes provide stable cutting action for internal UNF thread milling
• 9/16-18 UNF internal thread form with 18 teeth per inch
• 0.45 inch cutting diameter and 1.134 inch length of cut suited to standard thread depth requirements
• 1/2 inch shank diameter compatible with common CNC toolholding systems

Compatibility

Designed as an OEM-style thread milling tool for CNC machining centers capable of helical interpolation and accepting a 1/2 inch shank diameter in standard collet or milling chuck toolholders.

Installation Notes

Thread mills of this type are installed by qualified machinists on CNC machining centers programmed for helical interpolation. Ensure the spindle is fully stopped and the machine is in a safe state before mounting or removing the tool from the toolholder. Verify runout with a dial indicator after clamping, as excessive runout will degrade thread quality and shorten tool life. Follow the toolholder manufacturer's torque and clamping procedures for 1/2 inch shank tooling.