{"product_id":"harvey-tool-70204-helical-flute-thread-mill-1-4-in-shank","title":"Harvey Tool 70204 Helical Flute Thread Mill 1\/4 in Shank","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HARVEY TOOL 70204 is a solid carbide helical flute thread mill designed to cut both internal and external threads in a single helical interpolation pass. It handles two common NPT pipe thread sizes: 1\/16-27 and 1\/8-27, both at 27 teeth per inch (TPI). The cutting diameter measures 0.245 inches, the shank diameter is 0.250 inches, and the length of cut is 0.437 inches. The bright uncoated finish suits a wide range of base materials. This tool is typically installed and run by machinists and CNC operators working in precision threading applications on machining centers.\u003c\/p\u003e\u003cp\u003eThis thread mill is suited for shops producing or repairing 1\/16-27 and 1\/8-27 NPT fittings, ports, and pipe connections in metal components. Its helical flute geometry allows the tool to mill full thread profiles on both internal bores and external bosses, making it a versatile option for low-quantity runs, difficult-to-tap materials, and close-tolerance thread work. The compact overall length of 2.5 inches fits standard tool holders on vertical and horizontal machining centers.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCuts both 1\/16-27 and 1\/8-27 NPT thread sizes in a single tool\u003c\/li\u003e\n\u003cli\u003eInternal and external thread milling capability eliminates the need for separate taps and dies\u003c\/li\u003e\n\u003cli\u003e3-flute helical geometry for balanced cutting and chip evacuation\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction provides rigidity and wear resistance\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish compatible with a broad range of workpiece materials\u003c\/li\u003e\n\u003cli\u003eNo coolant-through design; flood or mist coolant applied externally\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use on CNC machining centers capable of helical interpolation with a 0.250-inch straight shank tool holder; suitable for threading 1\/16-27 and 1\/8-27 NPT ports and fittings in ferrous and non-ferrous metals.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThread milling requires a CNC control capable of helical interpolation; confirm your CAM program or canned cycle is configured for the correct thread pitch and hand of thread before cutting. Secure the 0.250-inch shank in a precision collet or end mill holder and verify runout before the first pass. Use appropriate cutting speeds and feeds for solid carbide in your workpiece material, and apply external coolant or mist to manage chip evacuation and tool temperature. Inspect threads with a calibrated thread gauge after the first part to confirm fit before production runs.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Sizes\u003c\/strong\u003e: 1\/16-27 and 1\/8-27\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 (TPI)\u003c\/strong\u003e: 27\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.250 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 0.245 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.437 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Nominal Diameter\u003c\/strong\u003e: 0.0625 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Solid Carbide\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\u003eWeight\u003c\/strong\u003e: 0.01 pounds\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: HARVEY TOOL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 70204\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HARVEY TOOL","offers":[{"title":"Default Title","offer_id":51747592470834,"sku":"70204","price":254.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2b8206c0f2421de151e41c596ff8c986.jpg?v=1788883084","url":"https:\/\/voomisupply.com\/products\/harvey-tool-70204-helical-flute-thread-mill-1-4-in-shank","provider":"Voomi Supply","version":"1.0","type":"link"}