{"product_id":"hertel-e2039012-square-end-mill-3-16-in-4-flute-cobalt","title":"Hertel E2039012 Square End Mill 3\/16 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL E2039012 is a cobalt square end mill designed for precision milling operations in ferrous and high-temperature alloy materials. Built from M42 cobalt high-speed steel, this tool offers improved heat resistance and edge retention compared to standard M2 HSS end mills. It runs a 4-flute, right-hand spiral configuration with a 30-degree helix angle and arrives uncoated, making it well suited for applications where coolant is used to manage heat. The 0.1875-inch cutting diameter and 0.5-inch length of cut are sized for slotting, peripheral milling, and finishing passes in tight-tolerance workholding setups. Centercutting geometry allows plunge entry without a pre-drilled hole.\u003c\/p\u003e\u003cp\u003eThis end mill fits standard machining center and manual milling machine spindles that accept a 0.375-inch straight shank. It is appropriate for job shop, toolroom, and production environments where operators are milling steel, stainless, cast iron, or similar materials at moderate to high cutting speeds. The regular-length configuration keeps the tool stiff and minimizes deflection at depth, which is critical when maintaining sidewall accuracy in slotting operations. A licensed machinist or CNC operator typically selects this tool for roughing and finishing passes where a coated carbide tool is not required or preferred.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt HSS construction for elevated heat resistance and longer tool life in ferrous materials\u003c\/li\u003e\n\u003cli\u003e4-flute spiral design with 30-degree helix angle for smooth chip evacuation and surface finish\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry allows direct plunge entry without a pilot hole\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute orientation for standard spindle rotation\u003c\/li\u003e\n\u003cli\u003eUncoated finish compatible with flood coolant and cutting oil applications\u003c\/li\u003e\n\u003cli\u003eRegular-length body reduces deflection and improves rigidity at the workpiece\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit tooling option for any milling machine or machining center equipped with a 0.375-inch straight-shank tool holder, collet chuck, or end mill adapter.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified machinist. Power down and lock out the machine spindle before loading or removing the tool from the holder. Ensure the shank is fully seated in the collet or end mill holder and that the set screw or collet nut is torqued to the tool holder manufacturer specification. Inspect the cutting edges for chipping before each use, and confirm correct spindle rotation direction before engaging the workpiece.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.1875 inches (3\/16 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.5 inches (1\/2 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.375 inches (3\/8 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2.375 inches (2-3\/8 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\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\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.05 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: E2039012\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51755212079410,"sku":"E2039012","price":26.11,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/40eec9f617600a82becb333f915589b0.jpg?v=1788952255","url":"https:\/\/voomisupply.com\/products\/hertel-e2039012-square-end-mill-3-16-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}