{"product_id":"osg-404-312508-square-end-mill-5-16-in-4-flute-carbide","title":"Osg 404-312508 Square End Mill 5\/16 in 4 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 404-312508 is a solid carbide square end mill designed for precise milling operations in ferrous and non-ferrous materials. Part of OSG Series 404, this tool features a 5\/16 inch cutting diameter, a 13\/16 inch length of cut, and a 2-1\/2 inch overall length. The micrograin carbide substrate delivers hardness and wear resistance well beyond standard carbide grades. A TiCN (Titanium Carbonitride) coating reduces friction and extends tool life in demanding cutting conditions. The 30-degree helix angle promotes smooth chip evacuation while maintaining cutting stability. This end mill is centercutting, allowing plunge entry into the workpiece.\u003c\/p\u003e\u003cp\u003eThe 404-312508 is suited for slot milling, peripheral milling, and profiling operations on machining centers and CNC mills. Its regular-length geometry fits standard toolholders and collets accepting a 5\/16 inch shank. Right-hand cut and right-hand spiral flute configuration matches the vast majority of CNC spindle setups. The 4-flute design balances material removal rate with chip clearance, making it appropriate for both roughing passes in softer metals and finishing passes in harder alloys. Machinists and tool-and-die professionals working in job shops or production environments will find this a reliable general-purpose end mill.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eSolid micrograin carbide construction for hardness and dimensional stability\u003c\/li\u003e\n\u003cli\u003eTiCN coating reduces friction and extends tool life compared to uncoated carbide\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle supports efficient chip evacuation in spiral flute configuration\u003c\/li\u003e\n\u003cli\u003eCentercutting design enables direct plunge cuts without pre-drilling\u003c\/li\u003e\n\u003cli\u003e4-flute geometry balances stock removal with surface finish quality\u003c\/li\u003e\n\u003cli\u003eMill diameter tolerance of +0.000 \/ -0.001 inch for close-tolerance applications\u003c\/li\u003e\n\u003cli\u003eShank diameter tolerance of +0.00000 \/ -0.0005 inch for secure collet clamping\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard OEM-style solid carbide square end mill for use with 5\/16 inch collets and toolholders on CNC machining centers and manual mills requiring a regular-length, 4-flute end mill.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist following the machine tool manufacturer guidelines for toolholder torque and runout specifications. Confirm the spindle is fully stopped and the machine is in a safe lockout state before changing tooling. Seat the shank fully into the collet or toolholder to the recommended engagement depth to minimize runout and prevent pullout under load. Verify tool projection and runout with a dial indicator before beginning a cut cycle.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 5\/16 inch (0.3125 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 13\/16 inch (0.8125 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 5\/16 inch (0.3125 inches)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-1\/2 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: Solid Carbide (Micrograin)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiCN\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\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.000 \/ -0.001 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: +0.00000 \/ -0.0005 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 404\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.15 pounds\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: 404-312508\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51731408322866,"sku":"404-312508","price":51.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/84c6dd4c99600498fdad347e9c5af89f.jpg?v=1788730657","url":"https:\/\/voomisupply.com\/products\/osg-404-312508-square-end-mill-5-16-in-4-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}