Scientific Cutting Tools TM235-24HA Thread Mill 5/16-24 Unf

Product Description

The SCIENTIFIC CUTTING TOOLS TM235-24HA is a solid carbide helical flute thread mill designed to cut 5/16-24 UNF threads in both internal and external applications. Manufactured from submicron carbide and finished with an AlTiN+ coating, it delivers extended tool life in ferrous and hard materials common in precision machining environments. The 3-flute geometry produces full thread forms in a single helical interpolation pass. The cutting diameter is 0.2350 inches and the overall length is 2.5 inches, making it well-suited for CNC machining centers where rigid setups and precise cutter compensation are required. This tool is installed and operated by CNC machinists and tooling specialists in production and job-shop environments.

This thread mill is suited for machining 5/16-24 UNF internal and external threads in components requiring tight tolerances. Its helical flute design and right-hand flute direction make it compatible with standard CNC milling programs using circular interpolation. The 1/4-inch shank diameter fits common collet systems on vertical and horizontal machining centers. A length of cut of 0.6840 inches accommodates typical thread engagement depths for this thread size. It is appropriate for aerospace, automotive, and general precision manufacturing applications where thread milling is preferred over tapping to reduce breakage risk in blind holes or hard materials.

Key Features

• Cuts 5/16-24 UNF threads at 24 teeth per inch for both internal and external profiles in a single pass
• Solid submicron carbide construction provides rigidity and wear resistance in demanding materials
• AlTiN+ coating improves heat resistance and extends tool life in ferrous and high-temperature alloys
• 3-flute helical geometry balances cutting forces and chip evacuation during interpolation
• Right-hand flute direction compatible with standard CNC climb-milling thread programs
• 1/4-inch shank diameter fits standard collet chucks and tool holders on most machining centers

Compatibility

Designed for use in CNC machining centers capable of helical interpolation with a 1/4-inch collet or tool holder; suitable for cutting 5/16-24 UNF internal and external threads as specified by the thread standard.

Installation Notes

Thread milling requires a CNC machine capable of helical interpolation; confirm cutter compensation values and program offsets before running the first part. Secure the shank fully in a balanced collet or shrink-fit holder to minimize runout, which directly affects thread quality and tool life. Do not use this tool in manual or non-CNC operations. Follow shop safety protocols for carbide tooling, including eye protection and proper chip management during cutting.