{"product_id":"scientific-cutting-tools-tm-400-20h-thread-mill-1-2-20-unf","title":"Scientific Cutting Tools Tm 400-20H Thread Mill 1\/2-20 Unf","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SCIENTIFIC CUTTING TOOLS TM 400-20H is a solid carbide helical flute thread mill designed for cutting 1\/2-20 UNF threads in both internal and external applications. Built from submicron carbide with a bright, uncoated finish, it runs a 4-flute right-hand helix that supports efficient chip evacuation in a variety of materials. The 0.4-inch cutting diameter and 1-inch length of cut make it well-suited for threading operations where a single tool must handle multiple thread engagements in one pass. This tool is intended for use by machinists and toolroom professionals running CNC machining centers.\u003c\/p\u003e\n\u003cp\u003eThis thread mill is suited for production and job-shop environments where UNF 1\/2-20 threading is required on both through and blind-hole features without switching between internal and external tooling. Its helical flute geometry supports climb-milling thread strategies common in CNC programming. The 0.5-inch shank diameter ensures a rigid grip in standard toolholders, reducing deflection during the helical interpolation path. It is appropriate for use on ferrous and non-ferrous workpiece materials where an uncoated carbide edge provides adequate tool life.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCuts 1\/2-20 UNF threads both internally and externally with a single tool\u003c\/li\u003e\n  \u003cli\u003eSolid submicron carbide construction for hardness and edge retention\u003c\/li\u003e\n  \u003cli\u003e4-flute right-hand helical geometry promotes clean chip flow\u003c\/li\u003e\n  \u003cli\u003e0.4-inch cutting diameter with 1-inch length of cut for full thread engagement\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish compatible with a broad range of work materials\u003c\/li\u003e\n  \u003cli\u003e0.5-inch shank diameter fits standard CNC toolholders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in CNC machining centers capable of helical interpolation, with a 0.5-inch straight shank compatible with standard collet chucks and end mill holders. Threads produced conform to UNF 1\/2-20 standards.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread milling requires a CNC control capable of helical interpolation; confirm the program uses the correct cutter compensation offset before cutting. Secure the 0.5-inch shank in a balanced, runout-checked toolholder to minimize deflection along the helical path. Power down or e-stop the spindle before changing or inspecting the tool. This tool does not support coolant-through delivery, so direct external coolant flow to the cutting zone as needed.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNF\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Internal and External\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: 4\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: 0.4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1.0 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Nominal Diameter\u003c\/strong\u003e: 0.5 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: Submicron\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: SCIENTIFIC CUTTING TOOLS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: TM 400-20H\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SCIENTIFIC CUTTING TOOLS","offers":[{"title":"Default Title","offer_id":52087735615794,"sku":"TM 400-20H","price":304.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/12cd50f455d00524c526521482cfb91f.jpg?v=1790060502","url":"https:\/\/voomisupply.com\/products\/scientific-cutting-tools-tm-400-20h-thread-mill-1-2-20-unf","provider":"Voomi Supply","version":"1.0","type":"link"}