{"product_id":"hertel-e2053020-square-end-mill-5-16-in-4-flute-cobalt","title":"Hertel E2053020 Square End Mill 5\/16 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe HERTEL E2053020 is a cobalt double-end square end mill designed for general-purpose milling of ferrous and non-ferrous metals. With a 5\/16-inch cutting diameter, a 3\/4-inch length of cut, and a 3\/8-inch shank diameter, this tool fits standard milling chucks and collet holders commonly found in manual and CNC machining setups. The 4-flute spiral configuration with a 30-degree helix angle promotes efficient chip evacuation and a smooth finish in a wide range of materials. At 3.5 inches overall length, it is suited for standard-reach operations without extended toolholders. Machinists and tool-and-die professionals install this end mill in vertical mills, knee mills, and machining centers.\u003c\/p\u003e\u003cp\u003eThis end mill is used in job shops, production machining, and maintenance repair operations where cobalt tooling is preferred over standard HSS for improved heat and wear resistance. The double-end design allows the tool to be reversed when one end reaches wear limits, extending usable tool life. The centercutting geometry allows direct plunge entry into workpiece material, supporting slot milling, profile milling, and ramping applications. Right-hand cut and right-hand flute configuration is standard for conventional spindle rotation.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt construction (M42 grade) for improved hardness and heat resistance over standard HSS\u003c\/li\u003e\n\u003cli\u003eDouble-end design extends usable tool life by providing two cutting ends per tool\u003c\/li\u003e\n\u003cli\u003e4-flute spiral configuration with 30-degree helix angle for smooth chip evacuation\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry supports plunge, slot, and profile milling operations\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute for standard spindle rotation\u003c\/li\u003e\n\u003cli\u003eUncoated finish — ready for use with standard cutting fluids\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use cobalt square end mill compatible with 3\/8-inch collet holders and milling chucks used in standard vertical and CNC milling applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following shop safety procedures. Secure the shank fully within the collet or chuck to the manufacturer-recommended engagement depth before tightening. Ensure the spindle is fully stopped and the machine is powered down before inserting or removing the tool. Follow applicable OSHA machine guarding and PPE requirements during setup and operation.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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\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: 3.5 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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: M42\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\u003eExtended Reach\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: 0.08 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: E2053020\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"HERTEL","offers":[{"title":"Default Title","offer_id":51750407799090,"sku":"E2053020","price":41.78,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4ceff93344842c083fe43b209dc22563.jpg?v=1788915323","url":"https:\/\/voomisupply.com\/products\/hertel-e2053020-square-end-mill-5-16-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}