{"product_id":"osg-5226800-square-end-mill-25-64-in-2-flute-cobalt","title":"Osg 5226800 Square End Mill 25\/64 in 2 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 5226800 is a double-end cobalt square end mill designed for milling ferrous and difficult-to-machine materials in machining center and manual mill applications. It measures 0.3906 inches (25\/64 inches) in diameter with a 0.8125-inch (13\/16 inches) length of cut and a 0.5000-inch (1\/2 inches) shank diameter. The overall length is 3.7500 inches (3-3\/4 inches). Built from M42 cobalt high-speed steel, this tool handles heat and wear at cutting edges better than standard HSS, making it suitable for stainless steel, hardened alloys, and other demanding workpiece materials. The 30-degree helix and two-flute geometry support efficient chip evacuation in slotting and peripheral milling operations.\u003c\/p\u003e\u003cp\u003eThis end mill is used in job shops, tool rooms, and production environments where operators need a reliable cobalt tool for roughing and semi-finishing cuts. The double-end design provides two usable cutting ends, extending overall tool life before replacement. It is appropriate for CNC machining centers, knee mills, and manual bridgeport-style machines. The bright, uncoated finish makes it straightforward to resharpen. Series 522 indicates a regular-length geometry suited to general-purpose milling where extended reach is not required.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt high-speed steel construction for improved heat and wear resistance over standard HSS\u003c\/li\u003e\n\u003cli\u003eDouble-end design provides two cutting ends per tool\u003c\/li\u003e\n\u003cli\u003e30-degree right-hand helix promotes smooth chip flow in slotting and side-milling\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry allows plunge entry into workpiece material\u003c\/li\u003e\n\u003cli\u003eBright, uncoated finish is compatible with resharpening services\u003c\/li\u003e\n\u003cli\u003eTwo flutes suit applications requiring efficient chip clearance in softer and gummy materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use end mill for standard 1\/2 inch collet and end mill holder tooling systems used in CNC and manual milling machines.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists or toolroom personnel. Secure the 1\/2 inch shank in a matching collet, end mill holder, or Weldon-style holder, and verify runout before cutting. Ensure the spindle and any power feeds are fully stopped and locked out before changing tooling. Follow shop-specific speeds and feeds guidelines for cobalt tooling and the specific workpiece material being machined.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 25\/64 inches (0.3906 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 13\/16 inches (0.8125 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1\/2 inches (0.5000 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-3\/4 inches (3.7500 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\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\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\u003eEnd Type\u003c\/strong\u003e: Double End\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: Bright\/Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 522\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: OSG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5226800\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51733464252722,"sku":"5226800","price":112.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/0360a0008ab36e3f3ce56cf94c190277.jpg?v=1788755669","url":"https:\/\/voomisupply.com\/products\/osg-5226800-square-end-mill-25-64-in-2-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}