{"product_id":"hertel-e4039016-square-end-mill-1-4-in-4-flute-cobalt-tin","title":"Hertel E4039016 Square End Mill 1\/4 in 4 Flute Cobalt Tin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL E4039016 is a 4-flute cobalt square end mill designed for milling operations that require durability and heat resistance. Built from M42 cobalt high-speed steel, this tool carries a titanium nitride (TiN) finish that extends tool life in abrasive and harder materials. The single-end, center-cutting design allows for both peripheral and plunge cutting. With a 30-degree spiral helix angle and right-hand cut and flute configuration, it produces consistent chip evacuation and smooth surface finishes. Machinists and tool-and-die professionals select this end mill for demanding milling applications where standard HSS tooling falls short.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for use in vertical and horizontal milling machines, CNC machining centers, and manual knee mills. It handles slotting, profiling, and light plunge cuts in steel, alloy steel, cast iron, and similar ferrous materials. The 1\/4 inch cutting diameter and 3\/8 inch shank diameter make it a practical choice for finishing passes and detail work in moderate-depth pockets. It is sold individually and is appropriate for job shops, tool rooms, and production environments requiring precision cutting in tighter geometries.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt construction for improved heat and wear resistance over standard HSS\u003c\/li\u003e\n  \u003cli\u003eTiN coating extends tool life in abrasive and harder ferrous materials\u003c\/li\u003e\n  \u003cli\u003eCenter-cutting design allows direct plunge entry without pre-drilling\u003c\/li\u003e\n  \u003cli\u003e30-degree helix angle promotes efficient chip evacuation and reduced cutting forces\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, right-hand flute configuration compatible with standard spindle rotation\u003c\/li\u003e\n  \u003cli\u003eRegular-length geometry suits general-purpose milling without excessive overhang\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit replacement or standard addition for milling machines and CNC machining centers accepting a 3\/8 inch shank diameter. Suitable for use with standard ER collet chucks, end mill holders, and Weldon-style tool holders sized for 3\/8 inch shanks.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist following the machine tool manufacturer's tool-holding specifications. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Secure the shank to the specified engagement depth in the tool holder and verify runout before beginning cuts. Follow applicable workplace safety standards for rotating cutting tools, including proper guarding and chip containment.\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: 0.625 inches (5\/8 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.375 inches (3\/8 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.4375 inches (2-7\/16 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt (M42)\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\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: TiN (Titanium Nitride)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\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\u003eChipbreaker\u003c\/strong\u003e: No\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: HERTEL\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: E4039016\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51731080610098,"sku":"E4039016","price":33.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7306a35890d11e803a9a6897b2d43ca0.jpg?v=1788726729","url":"https:\/\/voomisupply.com\/products\/hertel-e4039016-square-end-mill-1-4-in-4-flute-cobalt-tin","provider":"Voomi Supply","version":"1.0","type":"link"}