{"product_id":"hertel-41120379-roughing-end-mill-3-8-in-4-flute-cobalt","title":"Hertel 41120379 Roughing End Mill 3\/8 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 41120379 is a single-end roughing end mill designed for aggressive material removal in milling operations. Built from M42 cobalt high-speed steel, it delivers heat and wear resistance suited to tough ferrous and non-ferrous materials. The 3\/8-inch diameter cutter features 4 flutes with a coarse pitch geometry that breaks chips into smaller segments, reducing cutting forces and heat buildup during heavy roughing passes. The bright, uncoated finish keeps the tool general-purpose and ready for use without additional surface treatment. Licensed machinists, tool-and-die technicians, and CNC operators use this style of end mill for roughing slots, pockets, and profiles before finishing passes.\u003c\/p\u003e\u003cp\u003eThis end mill fits standard vertical milling machines, knee mills, and CNC machining centers that accept a 3\/8-inch straight shank. The 3\/4-inch length of cut and 2-1\/2-inch overall length make it a regular-length tool appropriate for shallow-to-medium depth pockets and slotting applications. Right-hand cutting and right-hand flute direction are standard for conventional and climb milling setups. The coarse pitch is particularly effective in applications where chip evacuation is critical, such as aluminum, mild steel, and cast iron roughing.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt HSS construction for elevated heat resistance in demanding cuts\u003c\/li\u003e\n\u003cli\u003eCoarse pitch, 4-flute design promotes chip breaking and efficient evacuation\u003c\/li\u003e\n\u003cli\u003eCenter-cutting geometry allows plunge entry into workpieces\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish suitable for a wide range of materials\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute direction for standard milling setups\u003c\/li\u003e\n\u003cli\u003eSingle-end, regular-length configuration for versatile roughing applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use roughing end mill for any milling spindle or collet system accepting a 3\/8-inch straight shank.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists or CNC operators using an appropriate collet, end mill holder, or set-screw adapter rated for the 3\/8-inch shank diameter. Ensure the spindle and machine are fully powered down and locked out before changing tooling. Confirm runout and tool projection against the programmed depth of cut before beginning a roughing pass. Follow machine manufacturer guidelines for feed rate and spindle speed based on workpiece material.\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 HSS, Grade 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: 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 (2.5000 inches)\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: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\/Finish\u003c\/strong\u003e: Bright\/Uncoated\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: 0.1 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: 41120379\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51748609032498,"sku":"41120379","price":51.43,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e6823951ffe6de2e8f8e2d785fba501e.jpg?v=1788895682","url":"https:\/\/voomisupply.com\/products\/hertel-41120379-roughing-end-mill-3-8-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}