{"product_id":"scientific-cutting-tools-tm33518npt-thread-mill-npt-3-8-shank","title":"Scientific Cutting Tools TM33518NPT Thread Mill Npt 3\/8 Shank","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SCIENTIFIC CUTTING TOOLS TM33518NPT is a straight flute thread mill designed for cutting NPT (National Pipe Taper) threads in both external and internal applications. Built from submicron-grade solid carbide, it features 4 flutes and runs at 18 teeth per inch (TPI). The 0.335-inch cutting diameter and 0.693-inch length of cut make it suited for producing 1\/4-18 and 3\/8-18 NPT thread forms in a single helical interpolation pass. The bright, uncoated finish provides a consistent cutting edge without added coating thickness. Machinists and tool-and-die professionals use this mill where precise pipe thread geometry and repeatability are required.\u003c\/p\u003e\n\u003cp\u003eThis thread mill covers 1\/4-18 and 3\/8-18 NPT thread sizes, making it a practical single-tool solution for shops that produce fittings, manifolds, or ported components requiring standard pipe thread connections. Its 3\/8-inch shank and 3.5-inch overall length are compatible with standard collet chucks and milling tool holders found on CNC machining centers. The staggered-tooth configuration and submicron carbide substrate support performance in ferrous and non-ferrous materials where dimensional accuracy on pipe threads is critical.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCuts both 1\/4-18 and 3\/8-18 NPT thread forms, external and internal, with one tool\u003c\/li\u003e\n  \u003cli\u003eSubmicron-grade solid carbide substrate for edge retention and dimensional stability\u003c\/li\u003e\n  \u003cli\u003e4 straight flutes with staggered tooth geometry for improved chip evacuation\u003c\/li\u003e\n  \u003cli\u003e18 TPI with 0.335-inch cutting diameter and 0.693-inch length of cut\u003c\/li\u003e\n  \u003cli\u003eBright uncoated finish preserves precise cutting edge geometry\u003c\/li\u003e\n  \u003cli\u003e3\/8-inch shank diameter fits standard collet and end mill holders on CNC mills\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use on CNC machining centers capable of helical interpolation, with a 3\/8-inch shank suitable for standard ER and end mill collet holders. Covers 1\/4-18 and 3\/8-18 NPT thread specifications per the Thread Standard NPT designation provided by the manufacturer.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThread milling requires a CNC machining center with helical interpolation capability; confirm controller support before programming the toolpath. Secure the tool in a balanced, properly torqued collet holder and verify runout before cutting. Workpiece material and spindle speed selection should follow the carbide tooling parameters established in the shop's feeds-and-speeds reference or the manufacturer's application guide. Follow all machine guarding and lockout procedures before tool changes.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-18 and 3\/8-18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: NPT\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: External and Internal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTeeth Per Inch (TPI)\u003c\/strong\u003e: 18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.335 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.693 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMinimum Nominal Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide (Submicron Grade)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStaggered Tooth\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 23242117\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: TM33518NPT\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SCIENTIFIC CUTTING TOOLS","offers":[{"title":"Default Title","offer_id":51972149870898,"sku":"TM33518NPT","price":254.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7300cd84f364d9538c64ee57b8cc1b8c.jpg?v=1789963514","url":"https:\/\/voomisupply.com\/products\/scientific-cutting-tools-tm33518npt-thread-mill-npt-3-8-shank","provider":"Voomi Supply","version":"1.0","type":"link"}