{"product_id":"hertel-44839488-roughing-end-mill-1-4-in-3-flute-cobalt","title":"Hertel 44839488 Roughing End Mill 1\/4 in 3 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL 44839488 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel with a bright, uncoated finish, it measures 0.25 inches in diameter with a 0.875-inch length of cut and a 2.688-inch overall length. The 3-flute, coarse-pitch geometry is engineered to break chips quickly and evacuate material efficiently, reducing heat buildup during heavy cuts. With a 0.375-inch shank diameter and right-hand cutting and flute direction, this tool fits standard milling chucks and collet holders used by machinists and tool-and-die professionals.\u003c\/p\u003e\n\u003cp\u003eThis roughing end mill is suited for ferrous and non-ferrous metal removal in manual or CNC milling applications. The coarse pitch design handles interrupted cuts and heavy stock removal passes where a standard end mill would deflect or chatter. Typical applications include roughing pockets, slots, and profile passes in steel and stainless materials where a finishing pass will follow. It is not center-cutting and should not be used for direct plunge entry without a pre-drilled hole or ramp entry toolpath.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt construction for heat and wear resistance in ferrous materials\u003c\/li\u003e\n  \u003cli\u003e3-flute coarse-pitch design for fast chip evacuation during heavy roughing passes\u003c\/li\u003e\n  \u003cli\u003eBright, uncoated finish standard for general-purpose milling applications\u003c\/li\u003e\n  \u003cli\u003eRight-hand cutting and right-hand flute direction for conventional milling setups\u003c\/li\u003e\n  \u003cli\u003eNon-center-cutting geometry — use ramp entry or pre-drilled start holes\u003c\/li\u003e\n  \u003cli\u003e0.375-inch shank diameter fits common collet and end mill holder sizes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement roughing end mill compatible with standard milling machine collets and end mill holders accepting a 0.375-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and tool changes should be performed by a qualified machinist with the machine powered down and spindle locked. Ensure the collet or end mill holder is clean and free of chips before seating the shank. Confirm runout with a dial indicator before cutting, as excessive runout accelerates tool wear and reduces surface finish quality. This tool is not center-cutting — program ramp or helical entry toolpaths to avoid plunging directly into solid material.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter (Fractional)\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter (Decimal)\u003c\/strong\u003e: 0.2500 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.00394 \/ -0.00197 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt (M42)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePitch\u003c\/strong\u003e: Coarse\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 \/ -0.0005 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.688 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Single End\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\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Dimensions\u003c\/strong\u003e: 3.66 inches L x 0.59 inches W x 0.51 inches H\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.01058 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 44839488\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51732503920946,"sku":"44839488","price":44.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/82402f1c1119a1764ad06a663576c093.jpg?v=1788743693","url":"https:\/\/voomisupply.com\/products\/hertel-44839488-roughing-end-mill-1-4-in-3-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}