{"product_id":"osg-4920900-square-end-mill-2-in-8-flute-cobalt","title":"Osg 4920900 Square End Mill 2 in 8 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 4920900 is a single-end, square-profile end mill designed for metal removal in milling operations on machining centers and manual mills. Built from cobalt high-speed steel, it offers improved heat and wear resistance compared to standard HSS tooling, making it well suited for harder workpiece materials and higher-feed applications. The cutter runs an 8-flute configuration with a 30-degree helix angle, a right-hand cut, and right-hand flute orientation. It is supplied uncoated. At 2 inches in diameter with a 4-inch length of cut and a 2-inch shank, this is a large-diameter tool intended for heavy stock removal or finish passes in ferrous and non-ferrous metals.\u003c\/p\u003e\u003cp\u003eThe 4920900 is appropriate for production and job-shop environments where large-diameter milling of steel, stainless, cast iron, or similar materials is required. The 8-flute geometry increases the number of cutting edges in contact with the workpiece, supporting higher feed rates at moderate depths of cut. The coarse pitch classification and regular-length designation make this a practical choice for general-purpose facing, slotting, and peripheral milling where rigidity and tool life are priorities. Installation and use require a machine spindle capable of accepting a 2-inch straight shank and sufficient spindle torque for large-diameter cobalt tooling.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eCobalt high-speed steel construction for improved heat resistance over standard HSS\u003c\/li\u003e\n\u003cli\u003e8-flute design supports higher feed rates and improved surface finish\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle for efficient chip evacuation and smooth cutting action\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute orientation, standard for most milling setups\u003c\/li\u003e\n\u003cli\u003eUncoated finish, suitable for use with cutting fluids on ferrous and non-ferrous materials\u003c\/li\u003e\n\u003cli\u003eCoarse pitch classification for general-purpose milling applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a general-purpose large-diameter square end mill for use in machining centers and manual knee mills equipped with a 2-inch straight-shank tool holder. Confirm spindle taper, holder bore, and machine torque capacity before use.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation of large-diameter end mills should be performed by a qualified machinist or tooling technician. The machine spindle must be fully powered down and locked out before mounting or removing the cutter. Use a properly sized end mill holder or collet chuck rated for a 2-inch shank, and torque the retention fastener to the holder manufacturer's specification. Verify runout with a dial indicator before beginning cuts, as excessive runout on an 8-flute, large-diameter tool accelerates uneven wear.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCutting Diameter\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut (LOC)\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length (OAL)\u003c\/strong\u003e: 7.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\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: Coarse\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Type\u003c\/strong\u003e: Single End Square\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Cobalt High-Speed Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 8.4 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: 4920900\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51728203350322,"sku":"4920900","price":802.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4563e6f33e6007fc80e6405ba490b726.jpg?v=1788689466","url":"https:\/\/voomisupply.com\/products\/osg-4920900-square-end-mill-2-in-8-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}