{"product_id":"helical-solutions-81571-square-end-mill-1-4-in-3-flute-carbide","title":"Helical Solutions 81571 Square End Mill 1\/4 in 3 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HELICAL SOLUTIONS 81571 is a single-end, square-profile solid carbide end mill designed for cutting aluminum and other non-ferrous materials. It features a 0.25-inch mill diameter, a 0.375-inch length of cut, and a 45-degree right-hand helix angle that promotes efficient chip evacuation in gummy, low-hardness alloys. The reduced-neck geometry extends usable reach to 2.5 inches while keeping the shank diameter at 0.25 inches, allowing access to deeper pockets without sacrificing rigidity. Three flutes and a bright, uncoated finish make this tool well-suited for high-speed aluminum finishing and roughing passes where coating buildup is a concern. Installed by machinists and CNC operators in job shop and production environments.\u003c\/p\u003e\n\u003cp\u003eThis end mill fits standard 0.25-inch collet or end mill holders on CNC machining centers and manual knee mills. It is intended for aluminum, brass, copper, and other non-ferrous workpiece materials coded N under standard cutting tool material classifications. The 4-inch overall length and extended 2.5-inch reach make it practical for slotting, profiling, and pocketing operations where a standard-length tool cannot reach the full depth of the feature. The reduced neck keeps deflection manageable at extended reach.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eSolid carbide construction for rigidity and wear resistance in non-ferrous cuts\u003c\/li\u003e\n  \u003cli\u003e45-degree right-hand helix angle promotes aggressive chip lift in aluminum\u003c\/li\u003e\n  \u003cli\u003eReduced neck with 2.5-inch reach enables deep pocket access with a 0.25-inch shank\u003c\/li\u003e\n  \u003cli\u003eThree flutes balance chip room with cutting edge count for aluminum applications\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish prevents aluminum adhesion and built-up edge\u003c\/li\u003e\n  \u003cli\u003eCenter-cutting capable, supporting plunge entry and ramping operations\u003c\/li\u003e\n  \u003cli\u003eRight-hand cutting direction compatible with standard spindle rotation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in 0.25-inch end mill holders or collet chucks on CNC and manual milling machines. Primary workpiece material is aluminum and non-ferrous metals. Part of the HELICAL SOLUTIONS End Mills for Aluminum series featuring a 3-flute, square-end, 45-degree helix, reduced-neck configuration.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a properly sized collet or end mill holder torqued per the machine tool manufacturer specification. Verify spindle rotation direction matches the right-hand cutting direction before running. Ensure the tool is seated to full shank engagement depth in the holder to minimize runout and deflection at extended reach. Coolant-through is not supported on this tool; flood or mist cooling at the exterior is recommended when machining aluminum at elevated feed rates.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.25 inches (1\/4 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.375 inches (3\/8 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: 0.25 inches (1\/4 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReach Length\u003c\/strong\u003e: 2.5 inches\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: 45 degrees\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: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCutting Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Direction\u003c\/strong\u003e: Right Hand\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Helical\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\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable Helix\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\u003eWeight\u003c\/strong\u003e: 0.09 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: HELICAL SOLUTIONS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 81571\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HELICAL SOLUTIONS","offers":[{"title":"Default Title","offer_id":51744480887090,"sku":"81571","price":118.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/903777ce24302aa8d74cb77c3534d7df_e7c742f5-d318-4798-94ed-f435d95c9cac.jpg?v=1788857158","url":"https:\/\/voomisupply.com\/products\/helical-solutions-81571-square-end-mill-1-4-in-3-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}