{"product_id":"harvey-tool-903216-c6-corner-radius-end-mill-1-4-in-7-flute","title":"Harvey Tool 903216-C6 Corner Radius End Mill 1\/4 in 7 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HARVEY TOOL 903216-C6 is a solid carbide corner radius end mill engineered for milling hardened steels and hard alloys in the 45-68 Rc range. It runs a 1\/4 inch diameter with a 0.005 inch corner radius, seven flutes, and a variable helix geometry that reduces harmonics and improves surface finish during both roughing and finishing passes. The AlTiN PVD coating provides thermal resistance and wear protection at elevated cutting temperatures common in hard-material machining. Overall length is 2.5 inches with a 3\/8 inch length of cut. Licensed machinists and CNC toolroom techs reach for this style of tool when pushing hardened workpieces to tolerance.\u003c\/p\u003e\n\u003cp\u003eThis end mill is purpose-built for high-hardness ferrous materials including hardened steel, stainless steel, and cast iron rated 45 to 68 Rc. The short flute length and close pitch support aggressive depths of cut in rigid setups. Right-hand cut and right-hand flute direction make it compatible with standard spindle rotation. It is designed for use with high-precision toolholders to maintain runout tolerances required in hardened-material applications. Typical installations include die and mold work, aerospace components, and precision tool repair where workpiece hardness rules out standard carbide tooling.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction for rigidity and wear resistance in hardened-steel applications\u003c\/li\u003e\n  \u003cli\u003eSeven-flute, variable helix design reduces chatter and supports both roughing and finishing in a single tool\u003c\/li\u003e\n  \u003cli\u003eAlTiN PVD coating provides high-temperature oxidation resistance for dry or minimal-lubrication cutting\u003c\/li\u003e\n  \u003cli\u003e0.005 inch corner radius with a tolerance of plus or minus 0.001 inch protects the cutting edge and reduces stress concentrations on the workpiece\u003c\/li\u003e\n  \u003cli\u003eShort flute length (3\/8 inch LOC) maximizes core strength and minimizes deflection in deep-pocket or narrow-wall scenarios\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, right-hand helical flutes, straight-cylindrical shank for straightforward setup in standard CNC milling machines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eRated for steels, stainless steel, cast iron, and hard alloys in the 45-68 Rc hardness range per the Harvey Tool End Mills for Hardened Steels - Corner Radius series. Designed for use with high-precision toolholders to maintain the runout tolerances this tool class demands.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and operation should be performed by a qualified machinist or CNC programmer familiar with hard-material milling practices. Secure the 1\/4 inch straight-cylindrical shank in a high-precision collet or hydraulic toolholder and verify runout before cutting. Because this end mill is not centercutting and does not support coolant-through, tool path and chip evacuation strategy must account for heat buildup, especially at higher Rc values. Never exceed the tool manufacturer's recommended feed and speed parameters for the specific workpiece hardness.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.250 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.005 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius Tolerance\u003c\/strong\u003e: plus 0.0010 to minus 0.0010 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.090 inches (3\/8 inch nominal)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.250 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Tolerance\u003c\/strong\u003e: h6\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: 0.0000 to minus 0.0020 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length Tolerance\u003c\/strong\u003e: plus 0.0100 to minus 0.0000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix\u003c\/strong\u003e: Variable, 20 degrees nominal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Corner Radius, Single End\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePitch\u003c\/strong\u003e: Close\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight-Cylindrical\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: AlTiN (PVD)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Workpiece Material\u003c\/strong\u003e: Steel, Stainless Steel, Cast Iron, Hard Alloy (45-68 Rc)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Removal Type\u003c\/strong\u003e: Roughing and Finishing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.06 pounds\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: HARVEY TOOL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 903216-C6\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HARVEY TOOL","offers":[{"title":"Default Title","offer_id":51738652541234,"sku":"903216-C6","price":157.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/499f013b7e105b3a1af90e884567558c_d85fdaf8-4965-4987-8e22-10c94e55453a.jpg?v=1788802367","url":"https:\/\/voomisupply.com\/products\/harvey-tool-903216-c6-corner-radius-end-mill-1-4-in-7-flute","provider":"Voomi Supply","version":"1.0","type":"link"}