Carmex MT0312C0824UN Thread Mill 9/16-24 5/8-24 Carbide

Product Description

The CARMEX MT0312C0824UN is a solid carbide helical flute thread mill designed for cutting internal threads in the 9/16-24 to 5/8-24 range. Built from MT7-grade carbide and finished with a TiAlN coating, this tool handles demanding thread milling operations where tool life and surface finish consistency matter. It runs with a 0.276-inch cutting diameter, a 0.81-inch length of cut, and a 5/16-inch shank diameter. With 3 right-hand flutes and 24 teeth per inch, it produces UNEF and UNF thread profiles in a single helical interpolation pass. Installation and operation require a CNC machining center with helical interpolation capability.

This thread mill is suited for production and job-shop environments where a single tool must cover multiple thread sizes within a given pitch range. Typical applications include threading bores in ferrous and non-ferrous materials where a tap would be impractical due to part geometry, hole depth, or the need to thread to the bottom of a blind bore. The 2.5-inch overall length provides clearance for most standard workholding setups. No coolant-through capability is present, so flood or mist coolant applied externally is standard practice for chip evacuation and heat management.

Key Features

• Cuts internal UNEF and UNF threads from 9/16-24 to 5/8-24 with a single tool
• MT7-grade solid carbide construction for rigidity and wear resistance
• TiAlN coating extends tool life in high-temperature cutting conditions
• 3 right-hand helical flutes for efficient chip flow
• 24 TPI with 0.276-inch cutting diameter for precise thread geometry
• 5/16-inch shank diameter compatible with standard collet and end mill holders

Compatibility

Designed for use on CNC machining centers capable of helical interpolation. Thread standards covered are UNEF and UNF for the 9/16-24 to 5/8-24 size range.

Installation Notes

Thread mills must be installed in a collet chuck or precision end mill holder appropriate for a 5/16-inch shank. Confirm runout is within acceptable limits before cutting, as excess runout directly affects thread quality and tool life. Program the toolpath using helical interpolation with the correct climb or conventional milling direction per the material being machined. Always verify spindle speed and feed rate against the manufacturer's cutting data for carbide thread mills in the workpiece material before running the cycle.