{"product_id":"hertel-e4040048-square-end-mill-3-4-in-4-flute-cobalt","title":"Hertel E4040048 Square End Mill 3\/4 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL E4040048 is a 4-flute cobalt square end mill designed for general-purpose and high-performance milling in ferrous and non-ferrous metals. Built from M42 cobalt high-speed steel, it handles elevated cutting temperatures better than standard HSS tooling, making it a strong choice for stainless steel, alloy steel, and hardened materials. The 3\/4-inch cutting diameter pairs with a 3-inch length of cut in a long-series configuration, giving machinists reach for deep-pocket and shoulder-milling operations. A 30-degree helix angle promotes efficient chip evacuation, while the TiN (Titanium Nitride) surface finish reduces friction and extends tool life under continuous cutting loads. Right-hand cut and right-hand flute orientation follow standard convention for vertical and horizontal milling machines and CNC machining centers.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for job shop and production machining environments where deep pockets, slots, and full-width cuts are common. The centercutting geometry allows direct plunge entry without a pre-drilled hole, which simplifies programming in 3-axis CNC work. The long-series overall length of 5-1\/4 inches provides clearance when workholding or fixturing limits access. Typical users include machinists, tool-and-die makers, and CNC operators working on manual mills and machining centers in both prototype and production runs.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt HSS construction for improved heat resistance over standard M2 HSS\u003c\/li\u003e\n  \u003cli\u003eTiN coating reduces friction and extends edge life in continuous cutting\u003c\/li\u003e\n  \u003cli\u003eCentercutting design allows direct plunge milling without pilot hole\u003c\/li\u003e\n  \u003cli\u003e30-degree spiral flute helix promotes chip flow out of deep pockets\u003c\/li\u003e\n  \u003cli\u003eLong-series length of cut (3 inches) for deep-pocket and shoulder milling\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, right-hand flute — compatible with standard spindle rotation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard 3\/4-inch shank square end mill compatible with ER, R8, CAT, BT, and other common tool-holding systems that accept a 3\/4-inch straight shank. Verify spindle taper and collet or chuck capacity before installation.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a machinist or CNC operator. Ensure the spindle is fully stopped and the machine is powered down or in an e-stop state before loading or removing tooling. Use a properly sized collet, end mill holder, or set-screw holder torqued to the tool-holder manufacturer specification — do not over-tighten set-screw holders directly against the fluted section. Confirm tool runout with a dial indicator after clamping, and select speeds and feeds appropriate for M42 cobalt tooling and the workpiece material being cut.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/4 inch (0.7500 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: 3 inches (3.0000 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/4 inch (0.7500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 5-1\/4 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\u003eSurface Finish\u003c\/strong\u003e: TiN (Titanium Nitride)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Long Series\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChipbreaker\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.52 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: E4040048\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51732886356274,"sku":"E4040048","price":131.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0d83fb29da3c753748cb2ec6d7ae05d9.jpg?v=1788748080","url":"https:\/\/voomisupply.com\/products\/hertel-e4040048-square-end-mill-3-4-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}