{"product_id":"hertel-e299921159-square-end-mill-11-64-in-4-flute-cobalt","title":"Hertel E299921159 Square End Mill 11\/64 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL E299921159 is a single-end, square-profile cobalt end mill designed for milling operations on ferrous and hard materials. Built from M42 cobalt high-speed steel, it runs a 0.1719-inch (11\/64 inches) cutting diameter with a 0.5-inch length of cut and a 30-degree helix angle across four right-hand spiral flutes. The bright, uncoated finish is suited for applications where coating compatibility or re-sharpening is a priority. Machinists and toolroom operators use this end mill in vertical milling machines and CNC machining centers for slotting, profiling, and peripheral milling on steel, stainless steel, and similar hard-to-cut alloys.\u003c\/p\u003e\n\u003cp\u003eThis end mill fits standard 3\/8-inch collets and tool holders, making it a straightforward drop-in for most vertical mills and machining centers running that shank size. The 2.375-inch overall length provides adequate reach for typical workpiece setups without introducing excessive overhang. The centercutting geometry allows for plunge entry directly into the workpiece, adding versatility for pocket milling operations. It is appropriate for job shops, tool-and-die operations, maintenance machining, and production environments where cobalt tooling is specified for improved heat and wear resistance over standard HSS.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt high-speed steel construction for improved heat resistance and tool life on hard materials\u003c\/li\u003e\n  \u003cli\u003e4-flute spiral design with right-hand cut and right-hand flute direction for standard milling operations\u003c\/li\u003e\n  \u003cli\u003e30-degree helix angle balances cutting efficiency with edge strength\u003c\/li\u003e\n  \u003cli\u003eCentercutting geometry permits direct plunge entry into workpiece material\u003c\/li\u003e\n  \u003cli\u003eBright\/uncoated finish suitable for re-sharpening or use where coatings are not required\u003c\/li\u003e\n  \u003cli\u003eSingle-end configuration with 3\/8-inch shank for compatibility with standard collet systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for use in standard 3\/8-inch collet chucks and end mill holders on vertical milling machines and CNC machining centers. No specific model compatibility data was provided by the manufacturer for this SKU.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the shank fully into the collet or holder and tighten to the tool holder manufacturer's specified clamping procedure. Verify runout with a dial indicator before beginning the cut, as excessive runout will accelerate edge wear on a 4-flute tool at this diameter.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 11\/64 inches (0.1719 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 HSS)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inches (0.3750 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-3\/8 inches (2.3750 inches)\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\u003eCentercutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEnd Style\u003c\/strong\u003e: Single End\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Bright\/Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.5 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: E299921159\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51753108734258,"sku":"E299921159","price":36.28,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e682a4aa06f906a1836ddae3fd82953d_d1e41b49-15b7-428f-b1ac-05a19c8345d0.jpg?v=1788932876","url":"https:\/\/voomisupply.com\/products\/hertel-e299921159-square-end-mill-11-64-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}