{"product_id":"carmex-s0250c4224un-thread-mill-internal-3-flute-unc","title":"Carmex S0250C4224UN Thread Mill Internal 3 Flute Unc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe CARMEX S0250C4224UN is a solid carbide helical flute thread mill designed for cutting internal UNC threads in precision machining applications. Built to mini thread mill specifications, it features 3 flutes with a TiAlN coating for extended tool life in abrasive materials. The shank diameter is 0.250 inches with a cutting diameter of 0.138 inches, making it well suited for small-diameter internal threading work. The overall length is 2.5 inches with a length of cut of 0.420 inches. This tool is intended for use by machinists and CNC operators working on tight-tolerance threaded features in ferrous and non-ferrous workpieces.\u003c\/p\u003e\u003cp\u003eThis thread mill is appropriate for CNC machining centers performing internal thread milling operations where tap breakage risk is a concern or where a single tool must produce multiple thread sizes. At 24 teeth per inch, it is configured for standard UNC thread production. The mini thread mill classification makes it a practical choice for small-bore applications in production or job-shop environments. Coolant-through is not supported, so external coolant or mist lubrication should be used during operation.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide construction rated to material grade MT7 for rigidity and wear resistance\u003c\/li\u003e\n\u003cli\u003eTiAlN coating reduces heat buildup and extends tool life in demanding cuts\u003c\/li\u003e\n\u003cli\u003e3-flute helical design improves chip evacuation during internal thread milling\u003c\/li\u003e\n\u003cli\u003e24 TPI UNC thread standard configuration\u003c\/li\u003e\n\u003cli\u003eMini thread mill classification suited for small-diameter internal threading\u003c\/li\u003e\n\u003cli\u003e0.138 inch cutting diameter enables work in tight-bore features\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for internal UNC thread milling operations on CNC machining centers accepting a 0.250 inch shank diameter toolholder.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and operation of this tool should be performed by a qualified machinist or CNC programmer familiar with thread milling toolpaths. Ensure the toolholder collet or chuck is properly torqued and that runout is minimized before cutting. Power down or e-stop the machine and confirm the spindle is fully stopped before changing tooling. Do not use this tool for tapping operations  -  it is designed exclusively for helical interpolation thread milling cycles.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Internal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTeeth Per Inch\u003c\/strong\u003e: 24\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.138 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.420 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 2.080 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: MT7\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Mill Type\u003c\/strong\u003e: Mini\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242117\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: CARMEX\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: S0250C4224UN\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CARMEX","offers":[{"title":"Default Title","offer_id":51990437200178,"sku":"S0250C4224UN","price":305.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d5018f90b77ada3c756ef7bdc117139e_7dfac9e2-1dea-42c1-ad14-7bb92db92b6c.jpg?v=1789988938","url":"https:\/\/voomisupply.com\/products\/carmex-s0250c4224un-thread-mill-internal-3-flute-unc","provider":"Voomi Supply","version":"1.0","type":"link"}