{"product_id":"accupro-12182845-corner-radius-end-mill-5-16-in-4-flute","title":"Accupro 12182845 Corner Radius End Mill 5\/16 in 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 12182845 is a single-end, centercutting corner radius end mill ground from micrograin solid carbide and coated with titanium carbonitride (TiCN). It carries a 5\/16-inch cutting diameter and a 0.06-inch corner radius, producing a controlled blend between a flat bottom and the workpiece wall. The 40-degree right-hand helix promotes chip evacuation and reduces cutting forces across a broad range of ferrous and non-ferrous materials. With four flutes and a stub-length configuration, it delivers rigidity and surface finish quality in tight-tolerance finishing and semi-finishing passes. Machinists and tool-and-die technicians use it in CNC machining centers and manual mills.\u003c\/p\u003e\u003cp\u003eThis end mill suits precision work in mold and die applications, aerospace components, and general job-shop machining where sharp inside corners must carry a defined radius. Its 1\/2-inch length of cut and 2-inch overall length make it well suited to shallow-pocket and side-milling operations where tool deflection must be minimized. The 5\/16-inch shank diameter matches standard ER collet chucks and end-mill holders commonly found in vertical machining centers. Single-end geometry keeps the tool compact and easy to preset on a tool-length offset probe.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eMicrograin solid carbide substrate for wear resistance and edge stability\u003c\/li\u003e\n\u003cli\u003eTiCN coating extends tool life on hardened steels and cast iron\u003c\/li\u003e\n\u003cli\u003e0.06-inch corner radius reduces stress concentration at pocket floors\u003c\/li\u003e\n\u003cli\u003e40-degree right-hand helix promotes efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge entry into the workpiece\u003c\/li\u003e\n\u003cli\u003eStub length increases rigidity and minimizes deflection in finishing cuts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use end mill compatible with standard 5\/16-inch ER collet chucks, shrink-fit holders, and end-mill holders used in CNC and manual vertical machining centers.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and tool changes must be performed by a qualified machinist with the spindle fully stopped and the machine control in an e-stop or locked-out state. Seat the shank fully into the holder and torque the retention mechanism to the holder specification before running. Inspect the corner radius and cutting edges for chips or coating damage before each use. Follow all applicable shop safety protocols and machine manufacturer guidelines when setting tool length offsets and running initial test cuts.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 5\/16 inches (0.3125 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 5\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.06 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1\/2 inches (0.625 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 40 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide (Micrograin)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN\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\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Stub\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Corner Radius\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius Tolerance\u003c\/strong\u003e: plus or minus 0.0015 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.0000 to -0.0025 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 to -0.0004 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.06 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ACCUPRO\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 12182845\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51746056503602,"sku":"12182845","price":64.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/171b1265b240075439fdba1f8988051c.jpg?v=1788866419","url":"https:\/\/voomisupply.com\/products\/accupro-12182845-corner-radius-end-mill-5-16-in-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}