{"product_id":"hertel-e2031904-square-end-mill-5-8-in-4-flute-cobalt","title":"Hertel E2031904 Square End Mill 5\/8 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL E2031904 is a cobalt square end mill designed for milling, slotting, and profiling operations on ferrous and non-ferrous metals. Built from M42 cobalt high-speed steel, this tool delivers heat resistance and edge retention in demanding cutting applications where carbide tooling is not required. The end mill features a 5\/8-inch cutting diameter, a 1-3\/8-inch length of cut, and a 1\/2-inch shank diameter, with an overall length of 3-3\/8 inches. The 30-degree helix angle and four spiral flutes promote efficient chip evacuation during extended cuts. This is a single-end, uncoated tool intended for manual or CNC milling operations. It is installed and used by machinists and tool-and-die professionals in job shop, production, and maintenance environments.\u003c\/p\u003e\u003cp\u003eThe HERTEL E2031904 is suited for general-purpose milling in steel, stainless steel, cast iron, and other materials compatible with M42 cobalt tooling. The regular-length geometry makes it a practical choice for face milling, peripheral milling, and plunge operations where workpiece fixturing allows direct spindle access. The 1\/2-inch shank fits standard collet chucks, end mill holders, and milling machine spindles sized for that shank diameter. This tool is not centercutting, so ramp or helical entry strategies are recommended rather than direct plunge cuts.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt high-speed steel construction for heat and wear resistance\u003c\/li\u003e\n\u003cli\u003e5\/8-inch cutting diameter with 1-3\/8-inch length of cut\u003c\/li\u003e\n\u003cli\u003e4 spiral flutes with 30-degree helix angle for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, right-hand flute configuration\u003c\/li\u003e\n\u003cli\u003eRegular length geometry for standard milling and slotting applications\u003c\/li\u003e\n\u003cli\u003eUncoated finish suitable for use with cutting fluids on ferrous materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose replacement or standard-stock square end mill for milling machines and CNC machining centers equipped with a 1\/2-inch collet, end mill holder, or compatible spindle interface.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following shop safety procedures. Power down and lock out the milling machine spindle before changing tooling. Secure the shank fully into the collet or holder to the recommended engagement depth per the toolholder manufacturer guidelines. Verify runout with a dial indicator before initiating a cut. Because this end mill is not centercutting, do not program direct axial plunge moves; use ramping or helical entry paths instead.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.625 inches (5\/8 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: 1.375 inches (1-3\/8 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.500 inches (1\/2 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.375 inches (3-3\/8 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: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Uncoated\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: 0.504 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: E2031904\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51731798327602,"sku":"E2031904","price":70.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e48fa332ae045cc7a21796d9d29808f5.jpg?v=1788735051","url":"https:\/\/voomisupply.com\/products\/hertel-e2031904-square-end-mill-5-8-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}