{"product_id":"hertel-84511294-roughing-end-mill-1-4-in-4-flute-cobalt-m42","title":"Hertel 84511294 Roughing End Mill 1\/4 in 4 Flute Cobalt M42","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 84511294 is a single-end roughing end mill designed for aggressive material removal in milling applications. Built from M42 cobalt high-speed steel with a bright, uncoated finish, it delivers heat resistance and toughness suited to ferrous and difficult-to-machine materials. The tool measures 0.25 inches in diameter with a 0.375-inch shank diameter and an overall length of 3.125 inches. Four right-hand flutes with a coarse pitch geometry break up chips efficiently, reducing cutting forces and heat buildup during heavy roughing passes. Licensed machinists and toolroom technicians are the primary installers and operators of this tool.\u003c\/p\u003e\u003cp\u003eThis end mill is intended for roughing operations on machining centers, knee mills, and CNC vertical mills where stock removal rate is the priority over surface finish. The 1.25-inch length of cut and regular-length geometry make it appropriate for standard-depth pocketing, slotting, and peripheral roughing. It is not center-cutting, so it should be used for side milling and plunge operations only when appropriate toolpaths are programmed to avoid axial plunge entry. The coarse pitch and right-hand cutting direction are well-suited to conventional and climb milling strategies in shop environments running steel, stainless, and similar alloys.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt HSS construction provides elevated red hardness for machining tough materials\u003c\/li\u003e\n\u003cli\u003eCoarse-pitch, 4-flute design promotes chip evacuation during heavy roughing cuts\u003c\/li\u003e\n\u003cli\u003e0.375-inch shank diameter compatible with standard ER and end mill holders\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish allows direct use without coating-specific considerations\u003c\/li\u003e\n\u003cli\u003eRight-hand flute and right-hand cutting direction for standard spindle rotation\u003c\/li\u003e\n\u003cli\u003eSingle-end configuration; not center-cutting\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style roughing end mill compatible with standard 0.375-inch end mill holders and collet chucks used on vertical milling machines and CNC machining centers.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation and operation should be performed by qualified machinists or toolroom personnel. Ensure the machine spindle is fully stopped and locked before inserting or removing the tool from the holder. Use a properly sized collet or end mill holder that matches the 0.375-inch shank diameter and torque the retention hardware to the machine or holder manufacturer's specification. Verify runout with a dial indicator after securing the tool, and confirm the toolpath does not call for direct axial plunge entry, as this tool is not center-cutting.\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: 4\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: 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: 1.25 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\u003eOverall Length\u003c\/strong\u003e: 3.125 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\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: 84511294\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51730138726706,"sku":"84511294","price":50.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6ad826046bd60c6a3f30108c8873e438.jpg?v=1788712417","url":"https:\/\/voomisupply.com\/products\/hertel-84511294-roughing-end-mill-1-4-in-4-flute-cobalt-m42","provider":"Voomi Supply","version":"1.0","type":"link"}