{"product_id":"hertel-91191973-roughing-end-mill-1-1-4-in-6-flute-cobalt","title":"Hertel 91191973 Roughing End Mill 1-1\/4 in 6 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL 91191973 is a single-end cobalt roughing end mill designed for aggressive material removal in milling applications. Built from M42 cobalt high-speed steel, it handles tough ferrous and non-ferrous metals where standard HSS tooling wears quickly. The 6-flute coarse-pitch geometry breaks chips into smaller segments, reducing cutting forces and enabling deeper passes at higher feed rates. It measures 1.25 inches in diameter with a 6-inch length of cut and an 8.5-inch overall length. The bright, uncoated finish keeps the tool ready for use as received. Machinists and toolroom operators running manual mills or CNC machining centers are the primary users of this tool.\u003c\/p\u003e\u003cp\u003eThis roughing end mill is suited for roughing passes on ferrous alloys, stainless steel, and other hard materials that demand cobalt-grade tooling. The 1-1\/4-inch shank diameter matches the bore diameter, allowing direct mounting in standard end mill holders, collet chucks, or shell mill adapters of the same size. It is a common choice for production machining environments where stock removal rate matters more than final surface finish.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt construction for increased red-hardness and wear resistance compared to standard M2 HSS\u003c\/li\u003e\n\u003cli\u003e6-flute coarse-pitch design promotes aggressive chip breaking and high feed rates\u003c\/li\u003e\n\u003cli\u003e1.25-inch diameter with matching 1.25-inch shank for direct holder fitment\u003c\/li\u003e\n\u003cli\u003e6-inch length of cut accommodates deep shoulder and pocket roughing\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute direction — standard for conventional CNC and manual milling setups\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish — no coating buildup concerns on regrind\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style roughing end mill for use in standard 1-1\/4-inch end mill holders, collet chucks, or Weldon-style tool holders compatible with a 1-1\/4-inch shank diameter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully powered down and locked out before mounting or removing the tool. Secure the shank in a properly sized end mill holder and torque the set screw or clamping mechanism according to the holder manufacturer's specification. Verify runout with a dial indicator before beginning a cut, and confirm workpiece fixturing is rigid — coarse-pitch roughers generate elevated cutting forces compared to finish end mills.\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\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\u003eLength of Cut\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 8.5 inches\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\u003ePitch\u003c\/strong\u003e: Coarse\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\u003eCentercutting\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\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: 91191973\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51738361299250,"sku":"91191973","price":299.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a8a8577907503c42a1151ef2344fc67b.jpg?v=1788798622","url":"https:\/\/voomisupply.com\/products\/hertel-91191973-roughing-end-mill-1-1-4-in-6-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}