{"product_id":"hertel-e4041048-square-end-mill-3-4-in-4-flute-cobalt","title":"Hertel E4041048 Square End Mill 3\/4 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL E4041048 is a cobalt square end mill designed for milling steel, stainless steel, and high-temperature alloys in demanding machining environments. Built from M42 cobalt high-speed steel, it delivers better heat and wear resistance than standard M2 HSS tooling. The 0.75 inch cutting diameter pairs with a 4 inch length of cut, making it well suited for deep slot milling, profiling, and step milling operations where standard-length end mills fall short. A TiN (titanium nitride) coating reduces friction and extends tool life in ferrous materials. Machinists and tool-and-die professionals select this geometry for applications that require reach without sacrificing rigidity.\u003c\/p\u003e\u003cp\u003eThis end mill fits manual knee mills, CNC machining centers, and CNC bed mills running ferrous and exotic alloy stock. The extra-long length of cut category makes it appropriate for deep-cavity work, mold and die applications, and multi-step part profiles where a standard or long-series end mill cannot reach the required depth. Its centercutting geometry allows direct plunge entry into the workpiece without a pre-drilled hole, giving machinists flexibility in programming approach moves.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt HSS construction for elevated heat resistance in tough alloy steels\u003c\/li\u003e\n\u003cli\u003eTiN finish reduces friction and extends tool life on ferrous materials\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge milling without a starter hole\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle promotes smooth chip evacuation in deep slots\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, right-hand spiral flute — standard CNC and manual mill compatible\u003c\/li\u003e\n\u003cli\u003eExtra-long length of cut for deep-cavity, mold, and die work\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-fit replacement-style end mill for any milling machine or machining center accepting a 0.75 inch straight shank tool holder, collet, or end mill adapter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following standard toolroom practices. Ensure the spindle is fully stopped and locked before loading or removing the tool from the holder. Use a calibrated torque wrench on set-screw holders and verify tool runout with a dial indicator after seating. Consult your machine tool manufacturer guidelines and applicable shop safety standards before operation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/4 inch (0.7500 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 HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 4 inches (4.0000 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/4 inch (0.7500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6-1\/4 inches\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\u003eLength Type\u003c\/strong\u003e: Extra Long\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN (Titanium Nitride)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.63 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: HERTEL\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: E4041048\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51731149783346,"sku":"E4041048","price":147.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/8f8a42988a32cea8844920942e6af2f3.jpg?v=1788727601","url":"https:\/\/voomisupply.com\/products\/hertel-e4041048-square-end-mill-3-4-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}