Scientific Cutting Tools TM235-32HA Thread Mill 5/16-32

Product Description

The SCIENTIFIC CUTTING TOOLS TM235-32HA is a helical flute thread mill designed for cutting 5/16-32 UNEF threads in both internal and external applications. Built from submicron-grade solid carbide, it carries an AlTiN+ coating that improves wear resistance and tool life at elevated cutting temperatures. The tool features 3 right-hand flutes, a 0.2350-inch cutting diameter, and a 0.6690-inch length of cut. At 2.5 inches overall length with a 1/4-inch shank, it fits standard CNC toolholders used in precision machining centers. This tool is installed and operated by CNC machinists and toolroom technicians working to close-tolerance thread specifications.

This thread mill is suited for job shops, production machining environments, and toolroom applications where a single tool must handle both internal and external UNEF thread profiles at the 5/16-32 pitch. It performs in materials where solid carbide with AlTiN+ coating provides a clear advantage over HSS tooling, including hardened steels, stainless alloys, and cast iron. The helical flute geometry supports smooth chip evacuation during the thread milling cycle, reducing the risk of re-cutting chips in blind-hole applications.

Key Features

• Cuts 5/16-32 UNEF threads - handles both internal and external profiles with one tool
• Submicron-grade solid carbide substrate for rigidity and edge retention
• AlTiN+ coating provides heat and wear resistance in ferrous and hard materials
• 3 right-hand helical flutes promote chip flow and reduce cutting forces
• 0.2350-inch cutting diameter with 0.6690-inch length of cut
• No coolant-through design - suitable for flood or mist coolant delivery at the machine

Compatibility

Designed as a replacement or toolroom-standard thread mill for CNC machining centers requiring a 1/4-inch straight shank tool capable of producing 5/16-32 UNEF internal and external threads.

Installation Notes

This tool is installed by CNC machinists in standard end mill toolholders or collet chucks sized for a 1/4-inch shank. Confirm runout at the toolholder before beginning a thread milling cycle, as excessive runout directly affects thread quality and tool life. Program the helical interpolation path to match the 5/16-32 UNEF thread specification using the machine control or CAM software. Handle solid carbide tooling carefully during setup - carbide is brittle and susceptible to edge chipping if dropped or impacted against hard surfaces.