{"product_id":"accupro-310806-corner-radius-end-mill-1-4-in-4-flute","title":"Accupro 310806 Corner Radius End Mill 1\/4 in 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 310806 is a solid carbide corner radius end mill designed for precision milling operations requiring extended reach and a protected corner geometry. It features a 1\/4 inch diameter, a 3\/8 inch length of cut, and a 0.020 inch corner radius that reduces stress concentration at the cutting edge. The 4-flute, right-hand spiral configuration combined with a variable index geometry and AlCrTiN coating makes this tool well-suited for high-temperature cutting conditions in hardened and abrasive workpiece materials. Overall length is 4 inches with a 2-1\/8 inch reach length, making it appropriate for deep-cavity and extended-reach applications. It is centercutting and capable of plunge entry.\u003c\/p\u003e\n\u003cp\u003eThis end mill is intended for use in CNC machining centers and manual mills where corner radius geometry is required to prevent corner chipping, reduce part stress risers, or meet a radiused-floor callout. The extended reach and reduced neck diameter of 0.2370 inches allow access into pockets and slots where a standard-reach tool cannot reach the cutting zone. Typical applications include mold and die work, aerospace component machining, and production runs on hardened steel, stainless, and high-temp alloys. It is a single-end tool used by machinists and tooling setters in both job-shop and production environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eAlCrTiN coating improves heat resistance and tool life in dry and semi-dry cutting of hard materials\u003c\/li\u003e\n  \u003cli\u003eSolid micrograin carbide construction provides rigidity and wear resistance across the full tool length\u003c\/li\u003e\n  \u003cli\u003e0.020 inch corner radius reduces edge chipping and leaves a radiused floor in milled pockets\u003c\/li\u003e\n  \u003cli\u003eVariable index flute spacing reduces harmonic chatter during aggressive cuts\u003c\/li\u003e\n  \u003cli\u003eExtended reach with 2-1\/8 inch reach length and reduced neck diameter allows access to deep pockets\u003c\/li\u003e\n  \u003cli\u003eCentercutting design enables direct plunge entry without a pre-drilled pilot hole\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit replacement for 1\/4 inch shank toolholders including ER collet chucks, end mill holders, and hydraulic chucks used in CNC machining centers and manual mills requiring a corner radius end mill with extended reach in the HS series.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or tooling technician. Ensure the machine spindle is fully powered down and at a complete stop before changing tooling. Seat the 1\/4 inch shank to the recommended gauge line in the toolholder and torque the retention mechanism per the toolholder manufacturer specification. Verify runout with a dial indicator before beginning a cut, as excessive runout accelerates wear on a reduced-neck extended-reach tool.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1\/4 inch (0.2500 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: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inch (6.35 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNeck Diameter\u003c\/strong\u003e: 0.2370 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReach Length\u003c\/strong\u003e: 2-1\/8 inches (2.1250 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\u003eEnd Type\u003c\/strong\u003e: Corner Radius\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\u003eExtended Reach\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\u003eSeries\u003c\/strong\u003e: HS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.02 pounds\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: 310806\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51749344280882,"sku":"310806","price":83.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b2dfeb2b4d0f2d11e690336d6aa242bc_e57b96a5-640b-4f0e-8474-896a40d5619d.jpg?v=1788904745","url":"https:\/\/voomisupply.com\/products\/accupro-310806-corner-radius-end-mill-1-4-in-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}