{"product_id":"hertel-e2021048-ball-end-mill-0-75-in-4-flute-cobalt","title":"Hertel E2021048 Ball End Mill 0.75 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL E2021048 is a cobalt ball end mill designed for milling operations requiring a full-radius cutting profile at the tip. Built from M42 cobalt high-speed steel, it delivers strong heat and wear resistance in demanding cutting environments. The 0.75-inch diameter, 4-flute geometry produces a smooth finish on contoured surfaces, cavities, and 3D profiles. With a 3-inch length of cut and a 5.25-inch overall length, this tool suits both roughing and finishing passes where reach and rigidity are priorities. Licensed machinists and tool-and-die professionals are the primary users. It ships uncoated and is ready for use as delivered or with a shop-applied coating.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for machining steel, alloy steel, stainless steel, and similar ferrous materials where cobalt tooling excels over standard HSS. A 30-degree helix angle promotes smooth chip evacuation and reduces chatter on vertical machining centers and manual knee mills. The single-end configuration and right-hand cutting direction make it a direct fit for conventional CNC milling setups. It is well matched to profiling, slotting, and contouring work in job shops, tool rooms, and production machining environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt construction resists heat buildup during aggressive cuts in ferrous materials\u003c\/li\u003e\n\u003cli\u003eBall-end geometry generates full-radius profiles for 3D contouring and cavity work\u003c\/li\u003e\n\u003cli\u003e4-flute design balances chip evacuation with surface finish quality\u003c\/li\u003e\n\u003cli\u003e30-degree right-hand spiral helix reduces chatter and promotes clean chip flow\u003c\/li\u003e\n\u003cli\u003eUncoated finish allows direct use or application of a shop-specified coating\u003c\/li\u003e\n\u003cli\u003eSingle-end configuration with 0.75-inch shank diameter for standard collet or end mill holder fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct tooling option for CNC vertical machining centers, knee mills, and manual milling machines accepting a 0.75-inch shank end mill holder or collet.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a machinist or tool-room technician. Ensure the machine spindle is fully stopped and locked out before changing tooling. Secure the 0.75-inch shank in a properly sized collet or end mill holder torqued to the machine manufacturer's specification. Inspect the cutting edges for damage before each use and confirm runout with a dial indicator 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: 0.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.75 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)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlute Type\u003c\/strong\u003e: Spiral\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\u003eCoating\/Finish\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\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\u003eVariable Index\u003c\/strong\u003e: No\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: E2021048\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51749313380658,"sku":"E2021048","price":137.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/440da2b290c4ceb3ea96754ea3f5cbc0.jpg?v=1788904409","url":"https:\/\/voomisupply.com\/products\/hertel-e2021048-ball-end-mill-0-75-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}