{"product_id":"osg-4513900-square-end-mill-1-1-2-in-6-flute-cobalt","title":"Osg 4513900 Square End Mill 1-1\/2 in 6 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 4513900 is a cobalt square end mill engineered for demanding metal-removal applications in production and job-shop environments. With a 1-1\/2 inch cutting diameter and 5 inch length of cut, this tool handles deep-pocket milling, slotting, and peripheral cuts that shorter end mills cannot reach. The 1-1\/4 inch shank diameter and 7-1\/2 inch overall length provide the rigidity needed to resist deflection at extended reach. Six flutes deliver a high chip-load capacity and a fine-pitch configuration, making this end mill well-suited for steels and other ferrous materials where surface finish and tool life matter. The uncoated cobalt substrate is a proven choice when re-sharpening is part of the tooling program.\u003c\/p\u003e\u003cp\u003eThe OSG 4513900 fits long-reach milling operations on vertical and horizontal machining centers, CNC knee mills, and manual Bridgeport-style machines where clearance is required. The right-hand cut and right-hand flute geometry is the standard orientation for conventional milling setups. Its long length-of-cut classification makes it appropriate for deep-cavity work in mold and die, structural fabrication, and general machining. The fine-pitch flute spacing reduces chatter tendency on lighter-rigidity setups. This tool is installed by machinists and CNC operators working in metalworking and fabrication trades.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1-1\/2 inch cutting diameter with 5 inch length of cut for deep-reach applications\u003c\/li\u003e\n\u003cli\u003eSix flutes in a fine-pitch configuration for improved surface finish and chip evacuation\u003c\/li\u003e\n\u003cli\u003eCobalt construction provides elevated heat and wear resistance compared to standard HSS\u003c\/li\u003e\n\u003cli\u003eUncoated finish supports re-sharpening to extend tool life\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle balances cutting efficiency with edge strength on ferrous materials\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, right-hand flute geometry for standard milling spindle compatibility\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard tooling option for CNC machining centers and manual mills accepting a 1-1\/4 inch straight shank end mill. OSG Series 450 long-series end mill.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a qualified machinist or CNC operator. Ensure the spindle is fully stopped and the machine is in an e-stop or locked-out state before changing tooling. Seat the shank fully into a collet or end mill holder rated for the 1-1\/4 inch shank diameter and torque the retention hardware per the toolholder manufacturer specifications. Verify runout with a dial indicator before beginning a cut, particularly given the extended overall length.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 1-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut (LOC)\u003c\/strong\u003e: 5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1-1\/4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 7-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 6\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Square (Single End)\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\u003ePitch\u003c\/strong\u003e: Fine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Long\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt\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: 450\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: 4513900\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51750467535154,"sku":"4513900","price":654.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/72195fbc26d47d2591f9bc4eedee1da9.jpg?v=1788915664","url":"https:\/\/voomisupply.com\/products\/osg-4513900-square-end-mill-1-1-2-in-6-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}