{"product_id":"osg-5818200-square-end-mill-0-1772-in-4-flute-cobalt","title":"Osg 5818200 Square End Mill 0.1772 in 4 Flute Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe OSG 5818200 is a cobalt square end mill designed for milling operations requiring consistent performance in ferrous and difficult-to-machine materials. Built to Series 581 specifications, this single-end tool features a 0.1772-inch cutting diameter, a 4-flute geometry, and a 30-degree helix angle that promotes efficient chip evacuation and stable cutting action. The 3\/8-inch shank diameter accommodates standard ER and side-lock toolholders commonly found in vertical machining centers and knee mills. Machinists and toolroom technicians install this end mill for profiling, slotting, and peripheral milling where a small-diameter cobalt tool is specified.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for general-purpose metalworking in job shop and production environments. The 0.5-inch length of cut and 2-3\/8-inch overall length make it well-proportioned for shallow-to-moderate depth passes in steel, stainless, and alloy materials. The right-hand cut and right-hand spiral flute configuration are standard for conventional and climb milling on CNC and manual equipment. No chipbreaker geometry means consistent contact along the full cutting edge length, which is appropriate for finish and semi-finish passes.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eCobalt construction (M42 material grade) provides elevated heat resistance compared to standard HSS, extending tool life in harder work materials\u003c\/li\u003e\n  \u003cli\u003e4-flute spiral design with 30-degree helix angle for balanced chip flow and surface finish quality\u003c\/li\u003e\n  \u003cli\u003eUncoated finish — compatible with cutting fluid application for temperature management\u003c\/li\u003e\n  \u003cli\u003eRight-hand cut, right-hand flute — standard orientation for the majority of milling setups\u003c\/li\u003e\n  \u003cli\u003eNon-centercutting geometry — suited for peripheral and side milling, not plunge entry\u003c\/li\u003e\n  \u003cli\u003eSeries 581 regular-length profile provides rigidity in short-reach applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-specification cobalt square end mill for use in standard 3\/8-inch collet, ER, or side-lock toolholding systems on CNC machining centers and manual knee mills.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by qualified machinists or toolroom personnel. Ensure the machine spindle is fully stopped and the tool is secured with the appropriate torque on the toolholder before operation. Confirm runout with a dial indicator after clamping, as excessive runout accelerates wear on small-diameter end mills. Because this tool is non-centercutting, do not use it for direct plunge entry into solid material.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.1772 inches (4.50 mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 4\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 0.5000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.3750 inches (3\/8 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 2-3\/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\u003eEnd Mill Material\u003c\/strong\u003e: Cobalt\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial Grade\u003c\/strong\u003e: M42\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 581\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCentercutting\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\u003eVariable Helix\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 5818200\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51731041845554,"sku":"5818200","price":47.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/9e85a89a5bf6ddf39d02993dd7886900.jpg?v=1788726175","url":"https:\/\/voomisupply.com\/products\/osg-5818200-square-end-mill-0-1772-in-4-flute-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}