{"product_id":"osg-5320300-square-end-mill-0-25-in-3-flute-cobalt","title":"Osg 5320300 Square End Mill 0.25 in 3 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 5320300 is a cobalt square end mill designed for milling operations in ferrous and difficult-to-machine materials. Built from M42 cobalt high-speed steel, this double-end tool delivers consistent cutting performance across both ends, extending tool life and reducing cost per edge. The cutter features a 0.25-inch diameter, a 0.625-inch length of cut, and a 30-degree helix angle that promotes smooth chip evacuation in a wide range of milling applications. With three spiral flutes and a right-hand cut and right-hand flute configuration, the 5320300 is suited for slot milling, profiling, and peripheral milling on manual and CNC machine tools. It is centercutting, allowing direct plunge entry into the workpiece.\u003c\/p\u003e\n\u003cp\u003eThis end mill fits production and job-shop environments where cobalt tooling is specified for its superior heat resistance and toughness compared to standard HSS. The 3\/8-inch shank diameter and 3-3\/8-inch overall length make it compatible with standard collet chucks and end mill holders commonly found on knee mills, bed mills, and CNC machining centers. It is a regular-length tool in the OSG Series 532 line, making it a direct drop-in for shops already standardized on that series. The uncoated finish is appropriate for use with cutting fluids and for materials where coated tooling may cause adhesion or built-up edge issues.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt construction for improved heat resistance and edge retention over standard HSS\u003c\/li\u003e\n  \u003cli\u003eDouble-end design provides two usable cutting ends per tool\u003c\/li\u003e\n  \u003cli\u003e30-degree helix angle supports efficient chip evacuation in slot and profile milling\u003c\/li\u003e\n  \u003cli\u003eCentercutting geometry allows direct plunge cuts without pre-drilling\u003c\/li\u003e\n  \u003cli\u003eThree spiral flutes with right-hand cut and right-hand flute configuration\u003c\/li\u003e\n  \u003cli\u003eUncoated finish compatible with flood coolant and cutting oil applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement and standard tooling option within the OSG Series 532 end mill line. Fits any end mill holder or collet accepting a 3\/8-inch shank diameter.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by a machinist or tooling technician. Secure the 3\/8-inch shank in a properly sized collet or end mill holder and torque the holder to machine-tool manufacturer specifications before engaging the spindle. Inspect both cutting ends for chips or damage before use, and confirm runout with a dial indicator when close-tolerance work is required. Always bring spindle to full speed before engaging the workpiece, and apply appropriate cutting fluid for the material being machined.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.25 inches (1\/4 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\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: 0.625 inches (5\/8 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.375 inches (3\/8 inch)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.375 inches (3-3\/8 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: 532\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\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: OSG\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 5320300\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51747055730994,"sku":"5320300","price":82.93,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7fe4c4b4afedae220b7ee49668def1bc.jpg?v=1788875624","url":"https:\/\/voomisupply.com\/products\/osg-5320300-square-end-mill-0-25-in-3-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}