{"product_id":"helical-solutions-81406-square-end-mill-5-16-in-3-flute-carbide","title":"Helical Solutions 81406 Square End Mill 5\/16 in 3 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HELICAL SOLUTIONS 81406 is a 3-flute solid carbide square end mill designed for high-efficiency material removal in aluminum and non-ferrous metals. It carries a Zplus ZrN (zirconium nitride) coating that reduces built-up edge and improves surface finish on gummy materials. The 0.3125-inch mill diameter pairs with a 0.4375-inch length of cut and a 40-degree helix angle optimized for chip evacuation in aluminum. A variable-pitch flute spacing reduces harmonic vibration during cutting, making it well suited for high-speed machining operations. This tool is centercutting and right-hand cutting with a straight shank, intended for use by machinists and CNC tooling professionals in shop and production environments.\u003c\/p\u003e\u003cp\u003eThis end mill is built for aluminum and non-ferrous workpiece materials and fits standard milling applications where a 5\/16-inch diameter tool is required. Typical use cases include profiling, slotting, and plunging in aluminum billet, plate, cast aluminum, copper, brass, and similar soft non-ferrous alloys. The single-end, straight shank design seats directly in standard collet chucks and end mill holders. It is part of the HELICAL SOLUTIONS End Mills for Aluminum 3 Flute Square 40 degree Helix Variable Pitch series, making it a purpose-built tool rather than a general-purpose option.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.3125-inch (5\/16 inch) mill diameter with matching 0.3125-inch straight shank for direct collet mounting\u003c\/li\u003e\n\u003cli\u003e3-flute variable-index geometry reduces chatter and harmonic vibration during high-speed passes\u003c\/li\u003e\n\u003cli\u003e40-degree right-hand helical flutes promote aggressive chip evacuation in aluminum and non-ferrous materials\u003c\/li\u003e\n\u003cli\u003eZplus ZrN coating resists built-up edge and extends tool life on soft, adhesive materials\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows plunge entry without a pre-drilled pilot hole\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction throughout for rigidity and dimensional stability under thermal load\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in aluminum and non-ferrous machining applications as part of the HELICAL SOLUTIONS End Mills for Aluminum 3 Flute Square 40 degree Helix Variable Pitch series. Fits any milling machine or machining center equipped with a holder accepting a 0.3125-inch straight shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall in a clean, properly sized collet or end mill holder rated for the intended spindle speed and feed rate. Ensure the machine spindle is fully stopped and the control is in a safe state before changing tooling. Follow your machine tool builder guidelines and ANSI B11 safety standards for milling operations. Do not exceed the tool manufacturer recommended speeds and feeds for the specific workpiece material and depth of cut.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.3125 inches (5\/16 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.4375 inches (7\/16 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.0000 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3125 inches (5\/16 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 40 degrees\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 Mill Material\u003c\/strong\u003e: Solid Carbide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Zplus ZrN (Zirconium Nitride)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Type\u003c\/strong\u003e: Straight\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\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\u003eChipbreaker\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoolant Through\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\u003ePrimary Workpiece Material\u003c\/strong\u003e: Aluminum and Non-Ferrous\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem of Measurement\u003c\/strong\u003e: Fractional Inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.068 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: HELICAL SOLUTIONS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 81406\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELICAL SOLUTIONS","offers":[{"title":"Default Title","offer_id":51730425545010,"sku":"81406","price":75.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/827387c70c79aafd13d83aa48ef6aae0_8211b942-6f9f-47a6-bda4-2cdb036868b5.jpg?v=1788717229","url":"https:\/\/voomisupply.com\/products\/helical-solutions-81406-square-end-mill-5-16-in-3-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}