{"product_id":"accupro-311287-corner-radius-end-mill-1-2-in-4-flute","title":"Accupro 311287 Corner Radius End Mill 1\/2 in 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 311287 is a solid carbide corner radius end mill designed for precision milling in demanding metalworking applications. With a 1\/2 inch cutting diameter, 1 inch length of cut, and a 0.030 inch corner radius, this tool delivers controlled edge geometry that reduces stress concentration at workpiece corners. The AlCrTiN coating provides high heat resistance and wear protection, extending tool life in abrasive and high-temperature cutting conditions. A 38-degree helix angle combined with a variable index and chipbreaker geometry promotes efficient chip evacuation and reduces chatter. This end mill is installed and operated by machinists and CNC tooling professionals in production and job shop environments.\u003c\/p\u003e\n\u003cp\u003eThe 311287 is suited for milling ferrous and non-ferrous materials where corner radii are required on part features. Its centercutting design allows plunge entry, making it applicable for slotting, profiling, and ramping operations. The single-end, right-hand cut and right-hand flute spiral are standard for conventional and climb milling on vertical and horizontal machining centers. With a 3 inch overall length and 1\/2 inch shank diameter, the tool fits directly into standard 1\/2 inch end mill holders, collet chucks, and shrink-fit toolholders without adapters in most setups.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAlCrTiN coating for elevated heat resistance and extended tool life in hard and abrasive materials\u003c\/li\u003e\n  \u003cli\u003e0.030 inch corner radius end geometry reduces stress risers and improves surface finish at feature corners\u003c\/li\u003e\n  \u003cli\u003e4-flute, variable index design minimizes chatter and supports higher feed rates\u003c\/li\u003e\n  \u003cli\u003eChipbreaker geometry aids chip segmentation and evacuation during deep slot and pocket milling\u003c\/li\u003e\n  \u003cli\u003eCentercutting construction permits direct plunge entry without a pre-drilled pilot hole\u003c\/li\u003e\n  \u003cli\u003eMicrograin solid carbide substrate provides rigidity and edge retention across the full length of cut\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit replacement or standard tooling selection for 1\/2 inch end mill holders, ER collet chucks, and shrink-fit systems used on CNC vertical machining centers and manual knee mills accepting 1\/2 inch shank tooling.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist following the machine tool manufacturer's toolholder torque and runout specifications. Ensure the spindle is fully stopped and the machine is in an energy-isolated state before loading or unloading the tool. Verify shank seating depth and runout at the cutting diameter before engaging a cut. Do not exceed the tool's rated depth of cut for the material being machined.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1\/2 inch (0.5000 inches)\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 inch (25.40 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3 inches (76.2 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/2 inch (12.70 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0300 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 38 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: AlCrTiN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Corner Radius\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\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\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\u003eChipbreaker\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: HS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.06 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112803\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: ACCUPRO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 311287\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51727715926322,"sku":"311287","price":154.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/52320456bc8ff8c99b4afea0b587cfad_9df6b572-d631-476b-932c-32aac9f345e5.jpg?v=1788681193","url":"https:\/\/voomisupply.com\/products\/accupro-311287-corner-radius-end-mill-1-2-in-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}