{"product_id":"osg-5484100-square-end-mill-3-4-inch-4-flute-cobalt","title":"Osg 5484100 Square End Mill 3\/4 Inch 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 5484100 is a 4-flute cobalt square end mill designed for high-performance milling in ferrous and hardened materials. Built to Series 548 specifications, it features a 3\/4 inch cutting diameter, a 2-1\/4 inch length of cut, and a 4-1\/2 inch overall length with a matched 3\/4 inch straight shank. The cobalt construction — M42 grade — delivers superior heat resistance and edge retention compared to standard high-speed steel, making it a reliable choice for interrupted cuts, stainless steels, and heat-resistant alloys. The 30-degree helix angle promotes efficient chip evacuation and smooth cutting action across a range of materials.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for general-purpose and production milling operations in machine shops, toolrooms, and manufacturing environments. It handles shoulder milling, slotting, and peripheral profiling on vertical and horizontal machining centers as well as manual knee mills. The centercutting geometry allows direct plunge entry, adding flexibility when programming ramp or plunge moves without a separate drill operation. This tool is a single-end, uncoated configuration intended for shops that prefer to regrind or apply their own coatings.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt construction for improved red hardness and edge retention over standard HSS\u003c\/li\u003e\n  \u003cli\u003e30-degree right-hand spiral flute promotes efficient chip flow and reduced chatter\u003c\/li\u003e\n  \u003cli\u003eCentercutting design enables direct plunge cutting without a pilot hole\u003c\/li\u003e\n  \u003cli\u003e4 flutes provide a good balance of chip clearance and surface finish capability\u003c\/li\u003e\n  \u003cli\u003eUncoated finish allows straightforward regrinding and optional custom coating\u003c\/li\u003e\n  \u003cli\u003eMatched 3\/4 inch shank and cutter diameter for use in standard ER or side-lock holders\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-use tooling for standard 3\/4 inch end mill holders, collet chucks, and milling arbors used in vertical machining centers, CNC knee mills, and manual milling machines accepting straight-shank tooling.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the tool holder is clean and free of debris before seating the shank. Torque the set screw or collet nut according to the holder manufacturer specifications. Verify runout at the cutting end with a dial indicator before beginning any cut to maximize tool life and surface finish quality.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 3\/4 inch (0.7500 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 grade)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 2-1\/4 inches (2.2500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/4 inch (0.7500 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4-1\/2 inches\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\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\u003eSeries\u003c\/strong\u003e: 548\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.9 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: 5484100\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51735332028722,"sku":"5484100","price":142.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/15e929d26cd3caa8076ef32997e9dd63_366af6d6-2272-44fc-88a5-e986d58f3eea.jpg?v=1788771930","url":"https:\/\/voomisupply.com\/products\/osg-5484100-square-end-mill-3-4-inch-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}