{"product_id":"accupro-12183002-corner-radius-end-mill-1-4-in-4-flute","title":"Accupro 12183002 Corner Radius End Mill 1\/4 in 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 12183002 is a solid carbide corner radius end mill designed for precision milling of ferrous and non-ferrous materials. It features a 1\/4 inch mill diameter with a 0.045 inch corner radius that reduces stress concentration at the cutting edge and extends tool life in demanding applications. The 4-flute, right-hand spiral geometry with a 40-degree helix angle promotes efficient chip evacuation and smooth surface finishes. At 3 inches overall length with a 1-1\/8 inch length of cut, this is a long-reach configuration suited for slotting, profiling, and contouring operations where standard-length tools cannot reach. It is centercutting and runs in right-hand cutting direction. The bright, uncoated finish is appropriate for general-purpose use and applications where coating buildup is a concern.\u003c\/p\u003e\u003cp\u003eThis end mill is used in CNC machining centers, vertical mills, and manual knee mills for profiling, pocket milling, and contour work. The corner radius geometry is particularly well suited for operations requiring a blended radius at the floor-to-wall transition in a pocket, reducing the risk of chipping compared to a sharp corner end mill. Machinists, tool and die makers, and job shop operators working in production or prototype environments will find this tool applicable across steel, aluminum, and similar workpiece materials.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.045 inch corner radius reduces edge chipping and stress concentration at the cutting corner\u003c\/li\u003e\n\u003cli\u003e4-flute spiral geometry with 40-degree helix angle for efficient chip evacuation and improved surface finish\u003c\/li\u003e\n\u003cli\u003eSolid micrograin carbide construction for rigidity, wear resistance, and dimensional stability\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows plunge entry directly into the workpiece\u003c\/li\u003e\n\u003cli\u003eLong flute configuration: 1-1\/8 inch length of cut for deep pocket and contour work\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish suitable for general-purpose milling operations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard single-end corner radius end mill with a 1\/4 inch shank diameter, compatible with any ER, collet chuck, or end mill holder sized for 1\/4 inch shank tooling on CNC or manual milling machines.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following the machine tool manufacturer's toolholding guidelines. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank to the minimum recommended insertion depth in the holder to maximize rigidity and minimize runout. Verify runout with a dial indicator before beginning cuts, as excessive runout will accelerate corner radius wear and degrade surface finish quality.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1\/4 inch (0.2500 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000000 to -0.002500 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.045 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius Tolerance\u003c\/strong\u003e: 0.00150 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1-1\/8 inch (1.1250 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 to -0.0004 inch\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\/Finish\u003c\/strong\u003e: Bright, Uncoated\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: Long\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 End\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.14 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: 12183002\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51728880435506,"sku":"12183002","price":60.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7c600fabc0d6f0f1f2c8801f307196bd.jpg?v=1788697304","url":"https:\/\/voomisupply.com\/products\/accupro-12183002-corner-radius-end-mill-1-4-in-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}