{"product_id":"osg-5311500-square-end-mill-3-4-in-3-flute-cobalt","title":"Osg 5311500 Square End Mill 3\/4 in 3 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 5311500 is a square end mill designed for general-purpose milling operations in metal fabrication and machining environments. Built from M42 cobalt high-speed steel, it offers improved heat and wear resistance compared to standard M2 HSS tooling, making it well-suited for tougher ferrous materials. The 3\/4 inch cutting diameter and 3-flute spiral geometry provide a balance of chip evacuation and surface finish. A 30-degree helix angle aids in smooth cutting action and reduced cutting forces. This end mill is center-cutting, allowing it to plunge directly into a workpiece. It is installed and operated by machinists and tool-and-die professionals on manual mills and CNC machining centers.\u003c\/p\u003e\u003cp\u003eThe 5311500 is part of OSG Series 531 and is configured as a single-end, right-hand cut, right-hand flute tool with an uncoated finish. The 1-5\/8 inch length of cut and 3-5\/8 inch overall length place it in the regular-length category, appropriate for standard-depth pocketing, slotting, and peripheral milling operations. The 1\/2 inch shank diameter is a common size compatible with standard collets and end mill holders used in both manual and CNC setups.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt HSS construction for improved heat resistance and tool life in ferrous materials\u003c\/li\u003e\n\u003cli\u003e3-flute spiral design balances chip clearance with surface finish quality\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle reduces cutting forces and promotes smooth chip flow\u003c\/li\u003e\n\u003cli\u003eCenter-cutting geometry allows direct plunge entry without a pre-drilled hole\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute configuration for standard spindle operation\u003c\/li\u003e\n\u003cli\u003eUncoated finish suitable for use with cutting fluids on a wide range of 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 compatible with any milling machine or machining center equipped with a 1\/2 inch collet, end mill holder, or equivalent tool-holding system.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following standard toolroom procedures. Ensure the machine spindle is fully stopped and locked out before changing tooling. Seat the shank to the recommended depth in the holder and torque the set screw or collet nut to the tool-holder manufacturer's specification. Verify runout with a dial indicator before beginning a cut, particularly for tight-tolerance applications.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.750 inches (3\/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 HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1.625 inches (1-5\/8 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.500 inches (1\/2 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.625 inches (3-5\/8 inch)\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\u003eCenter Cutting\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\u003eEnd Type\u003c\/strong\u003e: Single End\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 531\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: 5311500\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51731442860338,"sku":"5311500","price":110.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/66539a786faf9f624f93a1c2fa0d9032.jpg?v=1788731181","url":"https:\/\/voomisupply.com\/products\/osg-5311500-square-end-mill-3-4-in-3-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}