{"product_id":"accupro-313021-corner-radius-end-mill-1-4-in-solid-carbide","title":"Accupro 313021 Corner Radius End Mill 1\/4 in Solid Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ACCUPRO 313021 is a solid carbide corner radius end mill designed for precision milling operations where a controlled edge radius and sharp corner geometry are required. It features a 1\/4 inch mill diameter, a 3\/8 inch length of cut, and a 2-1\/2 inch overall length. The 0.030 inch corner radius reduces edge chipping and stress concentration at the base of milled features. A ZrN (zirconium nitride) coating improves surface hardness and lubricity, extending tool life in a range of workpiece materials. The micrograin solid carbide substrate provides rigidity and wear resistance suited to close-tolerance work. This tool is installed by machinists and CNC operators in job shop and production environments.\u003c\/p\u003e\n\u003cp\u003eThe 313021 is suited for slot milling, peripheral milling, and profiling cuts where a radiused corner is specified on the finished part. The 2-flute, right-hand spiral configuration supports efficient chip evacuation in both ferrous and non-ferrous materials. The centercutting geometry allows plunge entry. With a 1\/4 inch shank diameter matching the mill diameter, it fits standard 1\/4 inch toolholders, collet chucks, and shrink-fit holders commonly used on vertical machining centers and CNC mills in light-to-medium material removal applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e0.030 inch corner radius reduces stress concentration and edge chipping on finished part corners\u003c\/li\u003e\n  \u003cli\u003eZrN coating increases surface hardness and reduces friction for extended tool life\u003c\/li\u003e\n  \u003cli\u003eMicrograin solid carbide substrate delivers rigidity and dimensional stability under cutting loads\u003c\/li\u003e\n  \u003cli\u003eCentercutting design allows direct plunge entry without pre-drilling\u003c\/li\u003e\n  \u003cli\u003eRight-hand 45-degree helix promotes smooth chip flow and stable cutting action\u003c\/li\u003e\n  \u003cli\u003eSingle-end, regular-length geometry for standard reach milling applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a replacement or production-use end mill for standard 1\/4 inch collet, hydraulic, or shrink-fit toolholders on CNC vertical machining centers and manual mills requiring a corner radius end geometry.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in a safe, locked-out state before changing tooling. Seat the shank fully in the toolholder to the recommended gauge line and torque the retention mechanism per the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning a production cut to confirm proper seating and holder condition.\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\u003eShank Diameter\u003c\/strong\u003e: 1\/4 inch\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: 2-1\/2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCorner Radius\u003c\/strong\u003e: 0.030 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 45 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: ZrN (Zirconium Nitride)\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\u003eSingle or Double End\u003c\/strong\u003e: Single\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\u003eLength Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000000 \/ -0.002000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: +0.0001 \/ -0.0004 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: 313021\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ACCUPRO","offers":[{"title":"Default Title","offer_id":51730728124722,"sku":"313021","price":59.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/56ef57d786682f6d437b05a67ecedce1.jpg?v=1788721816","url":"https:\/\/voomisupply.com\/products\/accupro-313021-corner-radius-end-mill-1-4-in-solid-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}