{"product_id":"carmex-mt0312c0820un-thread-mill-7-16-20-to-1-2-20-solid-carbide","title":"Carmex MT0312C0820UN Thread Mill 7\/16-20 to 1\/2-20 Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe CARMEX MT0312C0820UN is a solid carbide helical flute thread mill designed for cutting internal UNF threads in the 7\/16-20 to 1\/2-20 range. Built from MT7-grade solid carbide and finished with a TiAlN coating, this tool delivers high wear resistance and thermal stability in demanding machining environments. It runs with a right-hand flute direction, three flutes, and a cutting diameter of 0.276 inches, making it well suited for precise internal thread profiles where dimensional accuracy is critical. Machinists and CNC operators working with tight-tolerance threaded bores rely on tools like this for consistent results across production runs.\u003c\/p\u003e\u003cp\u003eThis thread mill is intended for internal thread milling operations in CNC machining centers. It covers UNF thread sizes from 7\/16-20 through 1\/2-20, making it a practical single-tool solution for shops working within that thread range. The 5\/16-inch shank diameter and 2.5-inch overall length suit standard toolholders used in vertical and horizontal machining centers. It is appropriate for use in aerospace, automotive, and general precision machining applications where UNF internal threads are required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCovers internal UNF thread range 7\/16-20 to 1\/2-20 with a single tool\u003c\/li\u003e\n\u003cli\u003eMT7-grade solid carbide construction for rigidity and extended tool life\u003c\/li\u003e\n\u003cli\u003eTiAlN coating improves heat resistance and reduces tool wear at elevated cutting speeds\u003c\/li\u003e\n\u003cli\u003eThree-flute helical design promotes chip evacuation during internal thread milling\u003c\/li\u003e\n\u003cli\u003eRight-hand flute direction compatible with standard CNC programming conventions\u003c\/li\u003e\n\u003cli\u003eNo coolant-through design  -  suitable for external coolant or air blast setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in CNC machining centers capable of helical interpolation for internal thread milling in the 7\/16-20 to 1\/2-20 UNF thread range.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread mills of this type are installed by licensed machinists or CNC operators in appropriate toolholders sized for a 5\/16-inch shank diameter. Confirm the machining center supports helical interpolation before programming internal thread cycles. Secure the shank with proper clamping force per toolholder manufacturer specifications and verify runout before cutting. Do not use this tool for external threading or in non-CNC hand-held applications.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\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\u003eThread Size Range\u003c\/strong\u003e: 7\/16-20 to 1\/2-20\u003c\/li\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: UNF\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTeeth Per Inch\u003c\/strong\u003e: 20 TPI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.276 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.83 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 5\/16 inches (0.3125 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Length\u003c\/strong\u003e: 1.7 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\u003eMinimum Nominal Diameter\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlN\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: 0.08 pounds\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: MT0312C0820UN\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"CARMEX","offers":[{"title":"Default Title","offer_id":52028488450354,"sku":"MT0312C0820UN","price":402.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0429b2e354469c24ae6b0013b6ef9f2c.jpg?v=1790017836","url":"https:\/\/voomisupply.com\/products\/carmex-mt0312c0820un-thread-mill-7-16-20-to-1-2-20-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}