{"product_id":"osg-5426400-square-end-mill-17-64-in-4-flute-cobalt","title":"Osg 5426400 Square End Mill 17\/64 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 5426400 is a cobalt square end mill designed for milling operations in ferrous and high-temperature alloy materials. Built from M42 cobalt high-speed steel, it delivers heat resistance and edge retention under demanding cutting conditions. The double-end configuration provides two usable cutting ends, extending tool life between replacements. With a 17\/64 inch (0.2656 inch) cutting diameter, 4 spiral flutes, and a 30-degree helix angle, it produces efficient chip evacuation and a stable cut. The right-hand cut, right-hand flute geometry is standard for conventional vertical milling setups. This end mill is uncoated and suited for general-purpose slotting, profiling, and side milling in a machine shop environment.\u003c\/p\u003e\u003cp\u003eThe OSG 5426400 is used in CNC machining centers, knee mills, and manual vertical mills for slotting, pocketing, and peripheral milling. The 11\/16 inch length of cut (0.6875 inch) handles moderate-depth passes in steel, stainless, cast iron, and similar materials. The 3\/8 inch shank diameter fits standard ER and end mill holders commonly found in job shop and production environments. The regular-length Series 542 designation positions this tool for standard-reach applications without the deflection risk of extended-reach tooling.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt HSS construction for heat resistance and edge retention in tough alloys\u003c\/li\u003e\n\u003cli\u003eDouble-end design provides two cutting ends per tool, maximizing value per tool\u003c\/li\u003e\n\u003cli\u003e4 spiral flutes with 30-degree helix angle for efficient chip evacuation\u003c\/li\u003e\n\u003cli\u003eRight-hand cut and right-hand flute geometry for standard milling setups\u003c\/li\u003e\n\u003cli\u003eNot center-cutting — requires a pre-drilled hole for plunge entry\u003c\/li\u003e\n\u003cli\u003eUncoated finish suitable for use with cutting fluids on ferrous materials\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-use tooling for standard 3\/8 inch end mill holders and collet chucks used in vertical milling applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by a machinist or toolroom technician. Secure the 3\/8 inch shank in a clean, properly sized end mill holder or collet to the manufacturer-specified torque for that holder type. Inspect the holder bore and collet for wear or contamination before seating the tool. Because this end mill is not center-cutting, do not plunge directly into solid material — use a pre-drilled entry point or ramp entry. Always confirm spindle direction matches the right-hand cut geometry before starting the machine.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 17\/64 inch (0.2656 inch)\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 HSS)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 11\/16 inch (0.6875 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 3\/8 inch (0.3750 inch)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3-3\/8 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\u003eCenter Cutting\u003c\/strong\u003e: No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Style\u003c\/strong\u003e: Double End\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: 542\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\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: 5426400\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51728520970546,"sku":"5426400","price":77.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/743ab534be385de3d3ef3fda6e405ec7.jpg?v=1788692628","url":"https:\/\/voomisupply.com\/products\/osg-5426400-square-end-mill-17-64-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}