{"product_id":"hertel-e211202801-ball-end-mill-0-4375-in-2-flute-hss","title":"Hertel E211202801 Ball End Mill 0.4375 in 2 Flute Hss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL E211202801 is a double-end ball end mill designed for contouring, profiling, and finish milling operations in ferrous and non-ferrous materials. Built from M7 high speed steel with an uncoated finish, this tool features a 0.4375-inch diameter ball nose geometry and a 30-degree right-hand spiral helix. The double-end configuration extends tool life by providing two usable cutting ends. With 2 flutes and a regular-length body, it is suited for moderate-depth slotting and peripheral milling where a smooth radius form is required. Licensed machinists and CNC operators working in job shops, toolrooms, and maintenance environments are the primary users of this tool.\u003c\/p\u003e\n\u003cp\u003eThis end mill is intended for use in vertical machining centers, knee mills, and manual milling machines. The 0.8125-inch length of cut is well matched to shallow-to-moderate pocket depths and contour passes. The 0.5-inch shank diameter fits standard R8, CAT, BT, and ER collet toolholding systems common in both CNC and manual setups. Its M7 HSS construction handles interrupted cuts and general-purpose milling at conventional speeds without the brittleness risk associated with carbide in impact-prone applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eDouble-end design provides two cutting ends, extending usable tool life\u003c\/li\u003e\n  \u003cli\u003eM7 high speed steel construction for toughness in interrupted and general-purpose cuts\u003c\/li\u003e\n  \u003cli\u003e30-degree right-hand helix promotes smooth chip evacuation and reduced chatter\u003c\/li\u003e\n  \u003cli\u003eBall nose geometry suited for 3D contouring, radius forms, and blending passes\u003c\/li\u003e\n  \u003cli\u003eUncoated finish — compatible with standard cutting fluids and re-sharpenable by a tool grinder\u003c\/li\u003e\n  \u003cli\u003e2-flute configuration provides chip clearance in slot milling and plunge entry\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose replacement or standard-stock ball end mill for any milling machine or machining center accepting a 0.5-inch straight shank toolholder.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or CNC setup personnel. Ensure the spindle is fully stopped and the machine is powered down or in E-stop before changing tooling. Seat the shank fully into the collet or end mill holder and torque the drawbar or clamping nut to the toolholder specification — do not use arbor-press force to seat the tool. Verify runout with a dial indicator after securing the tool, as excessive runout on a ball nose geometry accelerates uneven wear and degrades surface finish.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.4375 inches (7\/16 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.8125 inches (13\/16 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.5 inches (1\/2 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.75 inches (3-3\/4 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: High Speed Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: M7\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\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\u003eSingle or Double End\u003c\/strong\u003e: Double End\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExtended Reach\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\u003eVariable Index\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\u003eWeight\u003c\/strong\u003e: 0.16 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: HERTEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: E211202801\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51750650118450,"sku":"E211202801","price":91.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f80276fd9498de68e42f56c889b1b8d5.jpg?v=1788917808","url":"https:\/\/voomisupply.com\/products\/hertel-e211202801-ball-end-mill-0-4375-in-2-flute-hss","provider":"Voomi Supply","version":"1.0","type":"link"}