Scientific Cutting Tools TM235-18HA Thread Mill 5/16-18 Unc

Product Description

The SCIENTIFIC CUTTING TOOLS TM235-18HA is a helical flute thread mill designed for cutting 5/16-18 UNC threads in both internal and external applications. Built from submicron-grade solid carbide and coated with AlTiN+, this tool delivers high wear resistance and thermal stability during thread milling operations. It features 3 flutes with a right-hand flute direction, a cutting diameter of 0.235 inches, and a length of cut of 0.689 inches. With an overall length of 2.5 inches and a 0.25-inch shank diameter, it is sized for use in CNC machining centers running precision thread milling cycles.

This thread mill is suited for production and job-shop environments where a single tool must handle both internal and external 5/16-18 UNC threads. It is appropriate for ferrous and non-ferrous materials where AlTiN+ coatings provide extended tool life. Typical applications include aerospace, automotive, and general metalworking setups where thread milling is preferred over tapping for better thread quality, tool life control, and the ability to produce threads close to the bottom of a blind bore.

Key Features

• Cuts 5/16-18 UNC threads in both internal and external configurations with a single tool
• Submicron-grade solid carbide construction for rigidity and edge retention
• AlTiN+ coating provides elevated heat resistance and extended wear life
• 3-flute, right-hand helical design for efficient chip evacuation
• 0.235-inch cutting diameter with a 0.689-inch length of cut
• No coolant-through design - suitable for flood or mist coolant delivery externally

Compatibility

Designed as a direct-fit thread milling tool for CNC machining centers accepting a 0.25-inch shank diameter, used for 5/16-18 UNC thread forms in internal and external applications.

Installation Notes

Thread milling with this tool requires a CNC machining center capable of helical interpolation and the appropriate thread milling G-code cycle. Ensure the spindle and toolholder runout are within acceptable tolerance before use, as excessive runout will degrade thread quality and reduce tool life. Secure the shank with a precision collet or shrink-fit holder to the correct clamping depth. Follow the tool manufacturer's recommended feed, speed, and stepover parameters for submicron carbide tooling.