{"product_id":"accupro-311388-corner-radius-end-mill-3-16-in-5-flute","title":"Accupro 311388 Corner Radius End Mill 3\/16 in 5 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ACCUPRO 311388 is a solid carbide corner radius end mill designed for precision milling operations in ferrous and hard materials. Built on the HS Series platform, it features a 3\/16 inch (0.1875 inch) diameter with a 5-flute, right-hand spiral configuration and a 38-degree helix angle. The AlCrTiN coating provides thermal resistance and extended tool life in high-speed cutting environments. With centercutting capability and a variable index design, this end mill handles slotting, profiling, and plunge operations. It is installed and operated by machinists and CNC tooling professionals in production and job-shop environments.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for milling operations requiring a controlled corner radius of 0.0200 inch to reduce stress concentrations and improve surface finish at the base of pocketed features. The 9\/16 inch length of cut and 2 inch overall length make it appropriate for shallow-to-moderate depth work in tight-tolerance applications. It is commonly used on CNC machining centers handling die and mold work, aerospace components, and precision mechanical parts where corner geometry must be held consistently.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eAlCrTiN coating for high-temperature resistance and extended tool life in hard materials\u003c\/li\u003e\n\u003cli\u003e5-flute solid micrograin carbide construction for rigidity and fine surface finish\u003c\/li\u003e\n\u003cli\u003e0.0200 inch corner radius reduces stress risers at pocket floors and shoulders\u003c\/li\u003e\n\u003cli\u003eVariable index flute spacing reduces harmonic chatter during cutting\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge entry without pre-drilling\u003c\/li\u003e\n\u003cli\u003eRight-hand flute direction and right-hand cutting for standard CNC spindle compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a single-end corner radius end mill for use in standard 3\/16 inch collets, ER-style chucks, or shrink-fit toolholders on CNC milling machines and machining centers.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eThis end mill is installed and changed by qualified machinists following shop safety protocols. Ensure the spindle is fully stopped and locked out before changing tooling. Use a properly sized collet or toolholder to achieve correct runout; excessive runout will reduce tool life and compromise corner radius accuracy. Follow machine manufacturer feed and speed recommendations for solid carbide tooling with AlCrTiN coating.\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: 9\/16 inches (0.5625 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: 0.0200 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\u003eCentercutting\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\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\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000000 \/ -0.001000 inches\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: 311388\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51738073334066,"sku":"311388","price":78.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3a77be154828ab22424671ef524a112f.jpg?v=1788795990","url":"https:\/\/voomisupply.com\/products\/accupro-311388-corner-radius-end-mill-3-16-in-5-flute","provider":"Voomi Supply","version":"1.0","type":"link"}