{"product_id":"hertel-e2020903-ball-end-mill-1-25-in-6-flute-cobalt","title":"Hertel E2020903 Ball End Mill 1.25 in 6 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL E2020903 is a single-end cobalt ball end mill designed for milling operations that require a full-radius cutting profile. Built from M42 cobalt high-speed steel, it delivers strong heat and wear resistance in tough ferrous and stainless materials. The 1.25-inch diameter cutting head features 6 spiral flutes with a 30-degree right-hand helix, generating smooth chip evacuation and consistent surface finish across the length of cut. At 4.5 inches overall length with a 2-inch length of cut, this tool suits standard machining centers and knee mills where rigidity and precision are required. Machinists and toolroom professionals handling interrupted cuts, contour work, or profiling operations will find this geometry well suited to production and job-shop environments.\u003c\/p\u003e\u003cp\u003eThis ball end mill is built for use in CNC machining centers, manual mills, and toolroom setups where a full-radius end profile is needed. Common applications include 3D contouring, die and mold work, slotting, and profiling in ferrous alloys, tool steels, and similar materials. The uncoated cobalt construction makes it a reliable choice where regrinding is part of the shop workflow. The 1.25-inch shank diameter matches standard ER or CAT toolholders sized for that bore, providing stable grip at full depth.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt high-speed steel construction for heat and abrasion resistance\u003c\/li\u003e\n\u003cli\u003e6 spiral flutes with 30-degree right-hand helix for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eBall end geometry suited for 3D contouring, profiling, and die work\u003c\/li\u003e\n\u003cli\u003eUncoated finish supports regrinding and reconditioning in-house\u003c\/li\u003e\n\u003cli\u003eSingle-end design with right-hand cutting direction\u003c\/li\u003e\n\u003cli\u003eRegular length profile balances reach and rigidity for common milling setups\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use cobalt ball end mill for standard toolholders with a 1.25-inch bore, compatible with CNC machining centers and manual milling machines accepting that shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or toolroom personnel. Secure the shank in a properly sized collet or end mill holder and verify runout before cutting. Ensure the machine spindle is fully stopped and locked before inserting or removing the tool. Follow shop safety procedures and applicable machine tool standards when setting speeds and feeds for cobalt tooling in the target material.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 6\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\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: M42\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: E2020903\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51752891744562,"sku":"E2020903","price":314.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1a5f676fd3304ab5565041386123ecee.jpg?v=1788930877","url":"https:\/\/voomisupply.com\/products\/hertel-e2020903-ball-end-mill-1-25-in-6-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}