{"product_id":"hertel-e2031020-square-end-mill-5-16-in-4-flute-cobalt","title":"Hertel E2031020 Square End Mill 5\/16 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe HERTEL E2031020 is a 4-flute cobalt square end mill designed for milling ferrous and hard alloy materials in machine shop and production environments. Built from M42 cobalt high-speed steel, it offers improved heat and wear resistance compared to standard M2 HSS tooling. The cutter measures 5\/16 inches in diameter with a 3\/4-inch length of cut, a 3\/8-inch shank diameter, and a 2-1\/2-inch overall length. The 30-degree spiral helix promotes efficient chip evacuation and smooth cutting action. It is an uncoated, single-end tool with right-hand cut and right-hand flute geometry, sized for use in standard vertical mills, knee mills, and CNC machining centers. Machinists and tool-and-die professionals are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for peripheral and slot milling operations on steel, stainless steel, cast iron, and other difficult-to-machine materials where cobalt tooling is preferred over carbide for its toughness and resistance to chipping. The regular-length configuration and 3\/8-inch shank make it compatible with standard ER collet chucks, end mill holders, and Weldon-style tool holders commonly found in job shop and production floor setups. It is not centercutting, so plunge operations are not recommended with this tool. Best performance is achieved in side milling, peripheral profiling, and slotting applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt HSS construction for improved heat resistance and edge retention on hard materials\u003c\/li\u003e\n  \u003cli\u003e4-flute geometry provides a good balance of chip clearance and surface finish in ferrous materials\u003c\/li\u003e\n  \u003cli\u003e30-degree helix angle promotes smooth chip flow and reduces cutting forces\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut and right-hand spiral flute for standard milling machine spindle compatibility\u003c\/li\u003e\n  \u003cli\u003eUncoated finish suitable for use with cutting fluids on a wide range of ferrous alloys\u003c\/li\u003e\n  \u003cli\u003eNon-centercutting design intended for peripheral and slot milling, not plunge cutting\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or standard stock tooling for use in any machine tool accepting a 3\/8-inch straight shank end mill, including vertical mills, knee mills, and CNC machining centers equipped with ER collet systems or Weldon-style holders.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and operation should be performed by qualified machinists familiar with milling machine setup and toolholder torque procedures. Ensure the machine spindle is fully stopped and the tool holder is clean and free of debris before mounting. Confirm shank engagement depth meets toolholder manufacturer minimums to prevent pull-out under load. Always use appropriate cutting fluid or coolant for the workpiece material, and verify spindle speed and feed rate against the tool manufacturer recommendations for cobalt HSS tooling before operation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 5\/16 inches (0.3125 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\/4 inches (0.7500 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: 2-1\/2 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: No\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: 0.504 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: E2031020\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51755293802802,"sku":"E2031020","price":34.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/235255e029821e816f251743509f861e.jpg?v=1788953214","url":"https:\/\/voomisupply.com\/products\/hertel-e2031020-square-end-mill-5-16-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}