{"product_id":"accupro-12183239-corner-radius-end-mill-1-4-in-4-flute","title":"Accupro 12183239 Corner Radius End Mill 1\/4 in 4 Flute","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 12183239 is a solid carbide corner radius end mill designed for precision milling in metal cutting applications. It features a 1\/4 inch diameter with a 0.06 inch corner radius, producing consistent radial blends and reducing stress concentrations at part corners. The 4-flute, right-hand spiral geometry supports efficient chip evacuation and smooth surface finishes. A TiCN coating increases surface hardness and wear resistance, extending tool life in abrasive ferrous and non-ferrous materials. With an extra-long 4 inch overall length and 1-1\/2 inch length of cut, this end mill reaches deeper pockets and stepped features that standard-length tools cannot access. Centercutting capability allows direct plunge entry without a pre-drilled pilot hole.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for CNC machining centers, vertical mills, and manual knee mills where corner radius profiles are required in steel, stainless, aluminum, and similar materials. The extra-long reach makes it appropriate for deep-cavity work, mold and die finishing, and multi-step contour passes. It is a single-end tool sold individually and is typically selected by machinists and toolroom professionals needing consistent corner geometry across production runs or prototype work.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e0.06 inch corner radius reduces stress risers and produces controlled radial blends\u003c\/li\u003e\n  \u003cli\u003eTiCN coating improves wear resistance and surface hardness for longer tool life in ferrous materials\u003c\/li\u003e\n  \u003cli\u003e4-flute right-hand spiral geometry for efficient chip evacuation and smooth finish\u003c\/li\u003e\n  \u003cli\u003eMicrograin solid carbide substrate for rigidity and dimensional stability under cutting load\u003c\/li\u003e\n  \u003cli\u003eExtra-long 4 inch overall length with 1-1\/2 inch length of cut for deep-pocket reach\u003c\/li\u003e\n  \u003cli\u003eCentercutting design permits direct plunge milling without a pre-drilled hole\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 1\/4 inch shank corner radius end mill compatible with any CNC or manual milling machine spindle accepting 1\/4 inch round shank toolholders, collets, or end mill holders.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and locked out before loading or removing the tool. Seat the shank fully in the collet or holder to the recommended minimum engagement depth and torque the retention hardware per the toolholder manufacturer specification. Verify runout with a dial indicator before beginning the cut, as excessive runout accelerates edge chipping on carbide tools.\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 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.0600 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\/2 inch (1.6250 inch)\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\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\u003c\/strong\u003e: TiCN\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\u003eLength Type\u003c\/strong\u003e: Extra Long\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\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000000 to -0.002500 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\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 to -0.0004 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 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: 12183239\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51749429182770,"sku":"12183239","price":73.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/80c49641858123808628175bf2dcab55.jpg?v=1788905987","url":"https:\/\/voomisupply.com\/products\/accupro-12183239-corner-radius-end-mill-1-4-in-4-flute","provider":"Voomi Supply","version":"1.0","type":"link"}