{"product_id":"scientific-cutting-tools-sptm080ml-thread-mill-4-40-to-4-64","title":"Scientific Cutting Tools SPTM080ML Thread Mill 4-40 to 4-64","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe SCIENTIFIC CUTTING TOOLS SPTM080ML is a single profile thread mill engineered for cutting both internal and external threads in the No. 4 thread size range, covering 40 to 64 TPI. Built from submicron-grade solid carbide, it delivers the rigidity and edge retention required for precision thread milling in hardened steels, stainless, aluminum, and other machinable alloys. The tool features a 0.08-inch cutting diameter, a 0.045-inch neck diameter, and a 3\/16-inch shank, making it well suited for small-diameter thread work where clearance is tight and tool runout must be minimized. Three flutes provide a balance of chip evacuation and cutting stability at typical thread milling feed rates.\u003c\/p\u003e\u003cp\u003eThis thread mill is intended for use on CNC machining centers capable of helical interpolation. It handles both through-hole and blind-hole internal threads as well as external boss threads in a single tool, reducing the need for multiple taps or dies in a setup. The 0.25-inch length of cut and 0.25-inch neck length keep the tool compact, which is appropriate for shallow thread depths typical of No. 4 fastener applications in precision mechanical assemblies, instrumentation, and electronics enclosures.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCuts internal and external threads in a single tool  -  eliminates separate tap and die setups\u003c\/li\u003e\n\u003cli\u003eCovers No. 4 thread range from 40 to 64 TPI with one profile\u003c\/li\u003e\n\u003cli\u003eSubmicron-grade solid carbide construction for extended tool life in demanding materials\u003c\/li\u003e\n\u003cli\u003e0.045-inch neck diameter provides clearance in confined bore entries\u003c\/li\u003e\n\u003cli\u003eBright\/uncoated finish suitable for non-ferrous and general-purpose machining applications\u003c\/li\u003e\n\u003cli\u003e3-flute geometry balances chip flow and cutting stability at small diameters\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use on CNC machining centers with helical interpolation capability; compatible with No. 4-40 through No. 4-64 thread forms in both internal and external applications across a range of workpiece materials.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread milling requires a CNC control programmed for helical interpolation  -  confirm machine capability before use. Secure the shank in a precision collet or milling chuck rated for the 3\/16-inch shank diameter and verify runout does not exceed the tolerance required for the thread class being cut. Inspect the cutting edges under magnification before each use; solid carbide tools at this diameter are brittle and susceptible to chipping if handled roughly or dropped. Follow the tool manufacturer's recommended speeds, feeds, and axial depth-per-pass guidelines for the specific workpiece material.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size Range\u003c\/strong\u003e: No. 4-40 to No. 4-64\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThreads Per Inch (TPI)\u003c\/strong\u003e: 40 to 64\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Type\u003c\/strong\u003e: Internal and External\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\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\u003eCutting Diameter\u003c\/strong\u003e: 0.08 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 0.045 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeck Length\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/16 inches (0.1875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\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: SPTM080ML\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SCIENTIFIC CUTTING TOOLS","offers":[{"title":"Default Title","offer_id":52035731194162,"sku":"SPTM080ML","price":74.94,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b2fd1d501d311b4f06e69becf49d9d62.jpg?v=1790023330","url":"https:\/\/voomisupply.com\/products\/scientific-cutting-tools-sptm080ml-thread-mill-4-40-to-4-64","provider":"Voomi Supply","version":"1.0","type":"link"}