Scientific Cutting Tools TM235-28HA Thread Mill 5/16-28

Product Description

The SCIENTIFIC CUTTING TOOLS TM235-28HA is a solid carbide helical flute thread mill designed for cutting 5/16-28 UN threads in both internal and external applications. Built from submicron-grade carbide and finished with an AlTiN+ coating, this tool delivers wear resistance and heat tolerance in demanding machining environments. It features 3 right-hand flutes, a 0.2350-inch cutting diameter, and a 1/4-inch shank. The 5/8-inch length of cut accommodates standard thread depths, while the 2-1/2-inch overall length provides clearance in typical milling setups. Machinists and CNC operators in precision manufacturing, aerospace, and general metalworking use this tool for high-accuracy thread milling operations.

This thread mill is suited for machining 5/16-28 UN threads on ferrous and non-ferrous workpieces where thread quality and dimensional accuracy are critical. Its helical flute geometry supports smooth chip evacuation during internal and external thread milling cycles. The solid carbide construction and submicron material grade make it appropriate for hardened materials and tight-tolerance work. CNC machining centers running standard thread-milling G-code cycles are the typical application environment. No coolant-through capability is present, so flood or mist coolant delivery from the outside is standard practice for this tool.

Key Features

• Cuts 5/16-28 UN threads - internal and external in a single tool
• Submicron solid carbide construction for rigidity and edge retention
• AlTiN+ coating increases surface hardness and thermal resistance
• 3 right-hand helical flutes for efficient chip evacuation
• 0.2350-inch cutting diameter with 0.6570-inch length of cut
• 1/4-inch shank diameter compatible with standard ER and end mill holders

Compatibility

Designed for use in CNC machining centers capable of thread-milling cycles; accepts standard 1/4-inch collet or end mill tool holders. Suited for 5/16-28 UN thread forms per standard UN thread specifications.

Installation Notes

Thread mills must be installed in a rigid, balanced tool holder and runout should be checked before cutting operations begin. Power down the spindle and confirm zero speed before tool changes. Use appropriate feeds, speeds, and a helical interpolation cycle as specified in your CAM software or CNC control - do not single-pass thread mill without verifying the programmed tool radius offset matches the actual cutting diameter. External coolant delivery is recommended since this tool does not have coolant-through capability.