{"product_id":"scientific-cutting-tools-tm345-18h-thread-mill-7-16-18-4-flute","title":"Scientific Cutting Tools TM345-18H Thread Mill 7\/16-18 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SCIENTIFIC CUTTING TOOLS TM345-18H is a helical flute thread mill designed for cutting 7\/16-18 UNS threads in both internal and external applications. Built from submicron-grade solid carbide, it delivers the rigidity and edge retention needed for precision threading in ferrous and non-ferrous materials. The tool features 4 right-hand flutes and an uncoated bright finish, with a cutting diameter of 0.345 inches and a 3\/8-inch shank. At 18 teeth per inch, it is matched to the 7\/16-18 thread pitch and produces accurate thread forms in a single helical interpolation pass on a CNC machining center.\u003c\/p\u003e\u003cp\u003eThis thread mill is suited for job shops, production machining, and toolroom applications where a single tool must handle both internal and external thread forms in the same setup. Its 3\/4-inch length of cut accommodates standard thread engagement depths for 7\/16-18 fastener interfaces. The 3.5-inch overall length provides clearance for deep-pocket work while maintaining tool stability on vertical and horizontal machining centers.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCuts 7\/16-18 UNS threads in both internal and external configurations\u003c\/li\u003e\n\u003cli\u003eSubmicron-grade solid carbide construction for edge retention and rigidity\u003c\/li\u003e\n\u003cli\u003e4 right-hand helical flutes for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003e0.345-inch cutting diameter matched to 7\/16-18 thread pitch\u003c\/li\u003e\n\u003cli\u003eBright\/uncoated finish compatible with a wide range of workpiece materials\u003c\/li\u003e\n\u003cli\u003e3\/4-inch length of cut suits standard thread engagement depths\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit thread mill for CNC machining centers requiring a 7\/16-18 UNS internal and external thread milling solution with a 3\/8-inch straight shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread mills of this type are installed by a machinist or CNC programmer into a standard collet or end mill holder sized for a 3\/8-inch shank. Confirm runout at the collet before threading operations, as excessive runout will produce out-of-tolerance thread forms. Program helical interpolation toolpaths according to the thread pitch and cutting diameter using the machine control or CAM software. Inspect the thread form with a go\/no-go gauge after the first pass before committing to a production run.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 7\/16-18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Standard\u003c\/strong\u003e: UNS\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: 18\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: 0.345 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\u003eLength of Cut\u003c\/strong\u003e: 0.800 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\u003eShank Diameter\u003c\/strong\u003e: 0.375 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\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: SCIENTIFIC CUTTING TOOLS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: TM345-18H\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SCIENTIFIC CUTTING TOOLS","offers":[{"title":"Default Title","offer_id":52108769558834,"sku":"TM345-18H","price":292.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/bd0a2b4cf8120ae364324ce0c0fcfff9_636f27e0-15dc-41cd-9b88-3cd64ea130ce.jpg?v=1790075113","url":"https:\/\/voomisupply.com\/products\/scientific-cutting-tools-tm345-18h-thread-mill-7-16-18-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}