{"product_id":"accupro-311378-corner-radius-end-mill-3-16-in-5-flute","title":"Accupro 311378 Corner Radius End Mill 3\/16 in 5 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 311378 is a solid carbide corner radius end mill designed for precision milling operations in demanding machining environments. The 311378 features a 3\/16-inch diameter with a 5-flute, right-hand spiral configuration and a 38-degree helix angle that promotes efficient chip evacuation and smooth cutting action. An AlCrTiN coating provides high heat resistance and extended tool life in hard and abrasive workpiece materials. The corner radius geometry measures 0.020 inches and reduces stress concentrations at the tool-workpiece interface, extending both tool and part life. Centercutting capability allows for plunge milling where required. This end mill is installed and operated by machinists and CNC programmers working in job shops, tool rooms, and production machining environments.\u003c\/p\u003e\u003cp\u003eThe ACCUPRO 311378 is suited for milling slots, profiles, and pockets in ferrous and non-ferrous materials where corner radius geometry is required on the finished part. With a 5\/16-inch length of cut and 2-inch overall length, it is appropriate for light to medium depth-of-cut applications in vertical machining centers and CNC knee mills. The variable index design helps reduce chatter and harmonic vibration during high-speed cutting passes. Single-end construction with a 3\/16-inch shank diameter allows direct collet or end mill holder mounting without adapters.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid carbide micrograin substrate for rigidity and wear resistance\u003c\/li\u003e\n\u003cli\u003eAlCrTiN coating for high-temperature and abrasion resistance\u003c\/li\u003e\n\u003cli\u003e5-flute, right-hand spiral with 38-degree helix for efficient chip flow\u003c\/li\u003e\n\u003cli\u003eCorner radius end type at 0.020 inches reduces part-edge stress\u003c\/li\u003e\n\u003cli\u003eVariable index flute spacing reduces chatter in high-speed passes\u003c\/li\u003e\n\u003cli\u003eCentercutting design enables plunge and ramp entry\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or equivalent solid carbide corner radius end mill for use in standard 3\/16-inch collets and end mill holders on CNC vertical machining centers and manual knee mills.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists using a standard collet chuck or end mill holder sized for a 3\/16-inch shank. Ensure the machine spindle is fully powered down and locked out before changing tooling. Verify runout with a dial indicator after seating the tool in the holder before beginning a cut. Follow shop-specific feeds, speeds, and depth-of-cut parameters appropriate to the workpiece material and machine capability.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/16 inches (0.1875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 5\/16 inches (0.3125 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.020 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\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\u003eVariable Index\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01 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: 311378\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51747455533362,"sku":"311378","price":72.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4982ca553e3c7a384c7701bfc8452705.jpg?v=1788880481","url":"https:\/\/voomisupply.com\/products\/accupro-311378-corner-radius-end-mill-3-16-in-5-flute","provider":"Voomi Supply","version":"1.0","type":"link"}