{"product_id":"hertel-44839009-roughing-end-mill-1-4-in-3-flute-cobalt","title":"Hertel 44839009 Roughing End Mill 1\/4 in 3 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 44839009 is a single-end roughing end mill designed for aggressive material removal in milling applications. Built from M42 cobalt high-speed steel with a TiCN coating, this tool handles tough ferrous and non-ferrous materials while maintaining edge hardness under heat. The coarse-pitch, 3-flute geometry breaks chips into smaller segments, reducing heat buildup and allowing faster feed rates compared to standard finishing end mills. With a 1\/4-inch cutting diameter and 1-1\/8-inch length of cut, it is sized for slotting, profiling, and roughing passes in small-to-medium workpieces. This tool is installed by machinists, tool-and-die technicians, and CNC operators.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for production and job-shop machining environments where roughing passes precede finish milling. The 3\/8-inch shank diameter provides rigid clamping in standard collet chucks, end mill holders, and Weldon-style tool holders. Right-hand cutting and right-hand flute direction make it compatible with conventional CNC machining centers and manual knee mills. It is not center-cutting, so it requires a pre-drilled or pre-bored entry point for plunge cuts. Typical applications include roughing steel alloys, tool steels, and stainless steel where TiCN coating provides added lubricity and wear resistance.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt HSS construction for elevated red hardness and wear resistance in tough alloys\u003c\/li\u003e\n\u003cli\u003eTiCN coating reduces friction and extends tool life in ferrous materials\u003c\/li\u003e\n\u003cli\u003eCoarse-pitch, 3-flute design promotes aggressive chip evacuation during roughing passes\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand helix for standard CNC and manual mill spindles\u003c\/li\u003e\n\u003cli\u003eSingle-end configuration with 3\/8-inch shank for rigid tool-holder clamping\u003c\/li\u003e\n\u003cli\u003eNot center-cutting — requires pre-drilled entry for any plunge operations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-fit roughing end mill for standard 3\/8-inch collet chucks, end mill holders, and Weldon-style holders used on CNC machining centers and manual vertical mills.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists or CNC setup technicians. Ensure the machine spindle is fully powered down and the tool holder is clean and free of debris before seating the shank. Tighten the collet or set screw to the tool-holder specification — do not over-torque. Verify runout with a dial indicator after clamping before beginning a cut.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1.125 inches (1-1\/8 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 2-15\/16 inches\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\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt (M42 HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePitch\u003c\/strong\u003e: Coarse\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\u003eCenter Cutting\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.00394 to -0.00197 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 to -0.0005 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Weight\u003c\/strong\u003e: 0.01058 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 3.66 x 0.59 x 0.51 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 27112803\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: 44839009\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51738628325682,"sku":"44839009","price":48.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ceb1f37b7ca71c93d50a7585ab0aad21.jpg?v=1788802035","url":"https:\/\/voomisupply.com\/products\/hertel-44839009-roughing-end-mill-1-4-in-3-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}