{"product_id":"osg-5404200-square-end-mill-1-in-4-flute-cobalt","title":"Osg 5404200 Square End Mill 1 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 5404200 is a cobalt square end mill designed for milling operations in ferrous and non-ferrous materials. Built to Series 540 specifications, it features a 1-inch cutting diameter, a 1-7\/8-inch length of cut, and a 4-flute spiral geometry with a 30-degree helix angle. Constructed from M42 cobalt high-speed steel, it delivers toughness and heat resistance in demanding cut conditions. The uncoated finish keeps regrinding straightforward. This tool is sized for right-hand cut and right-hand flute orientation, making it suitable for conventional vertical and horizontal milling setups operated by machinists and tool-and-die professionals.\u003c\/p\u003e\n\u003cp\u003eThe OSG 5404200 is a regular-length end mill intended for general-purpose slotting, profiling, and peripheral milling on manual mills and CNC machining centers. The 7\/8-inch shank diameter fits standard ER and side-lock collet chucks commonly found in job shop and production environments. With a 4-1\/8-inch overall length, it provides adequate reach for most standard workpiece setups without sacrificing rigidity. It is not center-cutting, so it is not suited for direct plunge entry. Pre-drilling or ramping entry is required before plunge operations.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1-inch cutting diameter with 1-7\/8-inch length of cut for standard slot and profile work\u003c\/li\u003e\n  \u003cli\u003eM42 cobalt high-speed steel construction for improved heat and wear resistance over standard HSS\u003c\/li\u003e\n  \u003cli\u003e4-flute spiral design with 30-degree helix angle for balanced chip evacuation and surface finish\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, right-hand flute configuration for conventional milling machine use\u003c\/li\u003e\n  \u003cli\u003e7\/8-inch shank diameter compatible with standard collet and chuck toolholding systems\u003c\/li\u003e\n  \u003cli\u003eNot center-cutting — requires pre-drilled or ramped entry for plunge operations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct application end mill for use in milling machines and CNC machining centers accepting a 7\/8-inch shank diameter toolholder.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation and tool changes must be performed with the machine spindle fully stopped and locked out per applicable machine safety procedures. Secure the shank fully within the collet or chuck to the recommended engagement depth before tightening. Inspect the shank and collet bore for chips or contamination before seating the tool. Verify spindle rotation direction matches the right-hand cut orientation of this tool before initiating a cut.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1.875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.875 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 4.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHelix Angle\u003c\/strong\u003e: 30 degrees\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\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\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCenter Cutting\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 540\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\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: 5404200\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51730837373234,"sku":"5404200","price":139.91,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4d44358f99ef7e8e9035e447ffc98924.jpg?v=1788723646","url":"https:\/\/voomisupply.com\/products\/osg-5404200-square-end-mill-1-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}