{"product_id":"osg-5820900-square-end-mill-0-4331-in-2-flute-cobalt","title":"Osg 5820900 Square End Mill 0.4331 in 2 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 5820900 is a cobalt square end mill engineered for precision milling in demanding shop environments. Built from M42 cobalt high-speed steel, this double-end tool delivers consistent cutting performance on alloy steels, stainless steels, and other tough workpiece materials. The 0.4331-inch (11.00 mm) cutting diameter pairs with a 30-degree spiral helix and two right-hand flutes to produce efficient chip evacuation and smooth surface finishes. The uncoated finish suits applications where re-sharpening or specific coating compatibility is required. This tool is installed by machinists and toolroom technicians on vertical machining centers, knee mills, and CNC milling equipment.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for slot milling, peripheral milling, and plunge cutting in ferrous and non-ferrous materials. Its centercutting geometry allows direct plunge entry without a pre-drilled hole. The regular-length profile fits standard tool holders for general-purpose work across job shops, maintenance machining, and production environments. The double-end design extends tool life by providing a second usable cutting end before the tool is retired or resharpened.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt construction for heat resistance and edge retention in hard materials\u003c\/li\u003e\n\u003cli\u003eDouble-end design provides two cutting ends per tool\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry allows direct plunge entry\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle promotes smooth chip flow and reduced cutting forces\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute for standard milling spindle operation\u003c\/li\u003e\n\u003cli\u003eSpiral flute design for consistent chip evacuation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard-stock cutting tool for use in any milling machine or machining center accepting a 1\/2-inch shank end mill holder, collet chuck, or side-lock holder.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is powered down before changing tooling. Seat the 0.5000-inch shank fully into the holder to the recommended gauge-line depth and torque the retention mechanism per the tool holder manufacturer specifications. Inspect the cutting edges for chips or damage before each use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.4331 inches (11.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt (M42)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.8125 inches (13\/16 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.5000 inches (1\/2 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.750 inches (3-3\/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\u003eDouble End\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\u003eSeries\u003c\/strong\u003e: 582\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\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: 5820900\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51738568851762,"sku":"5820900","price":104.68,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/844f3cea79a3081e6ebec282839ec70b.jpg?v=1788801111","url":"https:\/\/voomisupply.com\/products\/osg-5820900-square-end-mill-0-4331-in-2-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}