{"product_id":"hertel-e2040028-square-end-mill-7-16-in-4-flute-cobalt","title":"Hertel E2040028 Square End Mill 7\/16 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL E2040028 is a cobalt square end mill designed for general-purpose milling operations on ferrous and non-ferrous materials. Built from M42 cobalt high-speed steel, it delivers strong heat and wear resistance, making it well-suited for cutting harder steels and stainless alloys where standard HSS tooling loses its edge. The 7\/16 inch cutting diameter and 1-3\/4 inch length of cut place this tool in the long-series category. Four right-hand spiral flutes with a 30-degree helix angle promote efficient chip evacuation and smooth cutting action. The bright uncoated finish makes it a reliable choice for shops that prefer to apply their own coatings or work with materials sensitive to coating chemistry.\u003c\/p\u003e\u003cp\u003eThis end mill is used in vertical machining centers, knee mills, and manual or CNC milling machines across job shop, toolroom, and production environments. The single-end configuration and 1\/2 inch shank diameter suit standard ER and straight-shank collet systems. The centercutting geometry allows for direct plunge entry, expanding its usefulness in slotting and pocket-milling applications. It is typically installed by machinists and tool-and-die professionals working on steel fabrication, mold work, and general machining tasks.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt HSS construction provides superior red hardness and wear resistance versus standard M2 HSS\u003c\/li\u003e\n\u003cli\u003e4 right-hand spiral flutes with 30-degree helix angle for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eCentercutting design allows direct plunge cuts and slot milling\u003c\/li\u003e\n\u003cli\u003eLong-series length of cut (1-3\/4 inches) for deeper pocket and slot work\u003c\/li\u003e\n\u003cli\u003eBright uncoated finish compatible with a wide range of workpiece materials\u003c\/li\u003e\n\u003cli\u003eRight-hand cutting direction for conventional milling machine spindle rotation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use in standard milling machine collet systems accepting a 1\/2 inch shank diameter. Suitable for vertical mills, CNC machining centers, and manual knee mills equipped with ER collets, end mill holders, or straight-shank tool holders in the appropriate bore size.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or CNC setup technicians. Ensure the machine spindle is fully stopped and the control is in an e-stop or locked-out state before changing tooling. Seat the 1\/2 inch shank fully into the collet or tool holder and torque the retention nut to the tool holder manufacturer specification. Verify runout with a dial indicator before engaging the cut, as excessive runout accelerates flute wear and degrades surface finish.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 7\/16 inch (0.4375 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1-3\/4 inches (1.750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/2 inch (0.500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-3\/4 inches (3.750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt HSS\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: M42\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: Long Series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Bright \/ Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfiguration\u003c\/strong\u003e: Single End\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.504 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: E2040028\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51730781274418,"sku":"E2040028","price":47.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0729601d1f0616b640873650075a0820.jpg?v=1788722768","url":"https:\/\/voomisupply.com\/products\/hertel-e2040028-square-end-mill-7-16-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}