{"product_id":"hertel-e7039024-square-end-mill-3-8-in-4-flute-cobalt-ticn","title":"Hertel E7039024 Square End Mill 3\/8 in 4 Flute Cobalt Ticn","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL E7039024 is a single-end, square-profile cobalt end mill designed for metal cutting operations in milling machines and machining centers. Built from M42 cobalt high-speed steel, it carries a TiCN (titanium carbonitride) coating that increases surface hardness and reduces heat buildup at the cutting edge. The 4-flute design provides a higher feed rate and improved surface finish compared to 2-flute tools, making it well suited for finishing passes and slotting in ferrous and non-ferrous materials. At 3\/8 inch in diameter with a 3\/4 inch length of cut and a 2-1\/2 inch overall length, this tool fits standard ER and end mill holders with a 3\/8 inch bore.\u003c\/p\u003e\u003cp\u003eThis end mill is used in general machining environments including job shops, maintenance facilities, and production floors where a reliable cobalt tool is preferred over carbide for interrupted cuts or flexible setups. The centercutting geometry allows plunge milling directly into a workpiece without a pre-drilled pilot hole, expanding its utility in mold work, fixture building, and pocket milling. It is installed and used by machinists, toolmakers, and CNC operators working on knee mills, bed mills, and machining centers.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt high-speed steel construction resists heat and wear in ferrous machining\u003c\/li\u003e\n\u003cli\u003eTiCN coating adds surface hardness and lowers friction at the cutting edge\u003c\/li\u003e\n\u003cli\u003eCentercutting design enables direct plunge entry without a pilot hole\u003c\/li\u003e\n\u003cli\u003e4-flute configuration supports higher feed rates and improved surface finish\u003c\/li\u003e\n\u003cli\u003eSingle-end design with matched 3\/8 inch shank and cutter diameter for balanced setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or standard tooling option for milling machines and machining centers accepting 3\/8 inch shank end mill holders or collet chucks.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists using a standard end mill holder, collet chuck, or set-screw holder rated for the 3\/8 inch shank diameter. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Verify runout with a dial indicator after seating the tool to minimize vibration and premature edge wear. Follow your machine manufacturer guidelines for maximum RPM and feed rate for the cutter diameter and material being machined.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 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\u003eCoating\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 3\/4 inch (0.7500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCentercutting\u003c\/strong\u003e: Yes\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\u003eChipbreaker\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Style\u003c\/strong\u003e: Single End Square\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.08 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: E7039024\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51728111534386,"sku":"E7039024","price":50.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/18d7ba826cf48ecb710f02b66d2bc248.jpg?v=1788688175","url":"https:\/\/voomisupply.com\/products\/hertel-e7039024-square-end-mill-3-8-in-4-flute-cobalt-ticn","provider":"Voomi Supply","version":"1.0","type":"link"}