{"product_id":"osg-5400205-square-end-mill-3-16-in-4-flute-cobalt-tin","title":"Osg 5400205 Square End Mill 3\/16 in 4 Flute Cobalt Tin","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 5400205 is a cobalt square end mill designed for milling ferrous metals, stainless steels, and other tough materials in CNC machining and manual milling applications. Built from M42 cobalt high-speed steel with a titanium nitride (TiN) coating, this tool offers elevated heat resistance and extended tool life compared to standard HSS end mills. It features a 3\/16 inch cutting diameter, a 1\/2 inch length of cut, and a 30-degree right-hand spiral helix. Installed by machinists and tool-and-die professionals, it fits standard milling machines and machining centers using a 3\/8 inch shank collet or holder.\u003c\/p\u003e\u003cp\u003eThis end mill is suited for general-purpose profiling, slotting, and peripheral milling in job shop and production environments. The 4-flute configuration provides a good balance of chip clearance and surface finish quality, making it effective for finishing passes on ferrous alloys and medium-hardness steels. It is not center-cutting, so it requires a pre-drilled entry point or ramping approach for plunge operations. At 2-3\/8 inches overall length with a regular-length classification, it fits close-clearance setups without excessive overhang.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt HSS construction for increased heat and wear resistance over standard HSS\u003c\/li\u003e\n\u003cli\u003eTiN coating extends tool life and reduces friction on ferrous workpieces\u003c\/li\u003e\n\u003cli\u003e30-degree right-hand spiral flute promotes efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003e4-flute design supports improved surface finish in finishing and semi-finishing cuts\u003c\/li\u003e\n\u003cli\u003e3\/8 inch shank diameter for broad collet and end mill holder compatibility\u003c\/li\u003e\n\u003cli\u003eNot center-cutting — requires pre-drilled entry or ramp entry for plunge cuts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit tooling option for milling machines and machining centers accepting a 3\/8 inch shank end mill. Part of OSG Series 540.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by qualified machinists following shop-standard tool-change procedures. Ensure the spindle is fully stopped and machine power is locked out before changing tooling. Seat the shank fully in the collet or end mill holder and torque the drawbar or nut to the machine manufacturer's specification. Verify runout with a dial indicator before beginning a cut, particularly on finishing operations.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/16 inch (0.1875 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1\/2 inch (0.5000 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-3\/8 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 (M42 HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiN (Titanium Nitride)\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: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtended Reach\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChipbreaker\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\u003eSeries\u003c\/strong\u003e: 540\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: 5400205\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51730505695538,"sku":"5400205","price":58.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3f628b26abcd4439b50df6befd3aa0dd.jpg?v=1788718658","url":"https:\/\/voomisupply.com\/products\/osg-5400205-square-end-mill-3-16-in-4-flute-cobalt-tin","provider":"Voomi Supply","version":"1.0","type":"link"}