{"product_id":"osg-5365100-square-end-mill-1-in-3-flute-cobalt-long","title":"Osg 5365100 Square End Mill 1 in 3 Flute Cobalt Long","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe OSG 5365100 is a cobalt square end mill designed for milling operations in ferrous and hard materials where high-speed steel would wear prematurely. Built from M42 cobalt high-speed steel, this single-end tool runs a 1-inch cutting diameter with a 4-inch length of cut, making it well-suited for deep-pocket and slotting work where extended reach is required. The 3-flute geometry balances chip evacuation with rigidity, and the 30-degree spiral helix promotes smooth cutting action and reduced chatter. The uncoated finish keeps regrinding straightforward. This tool is classified as a long-series end mill and is installed by machinists and tool-and-die professionals in vertical machining centers and manual mills.\u003c\/p\u003e\u003cp\u003eThe OSG 5365100 fits standard applications in job shops, maintenance machining, and production environments where a 1-inch cobalt end mill is required for steel, stainless, cast iron, or similar materials. The 1-inch shank diameter suits R8, CAT, BT, and other common spindle toolholders designed for 1-inch straight shanks. The 6.5-inch overall length provides the clearance needed for deep-reach setups without requiring extension holders. Centercutting capability allows direct plunge entry into the workpiece.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eM42 cobalt construction for improved heat and wear resistance over standard M2 HSS\u003c\/li\u003e\n\u003cli\u003e3-flute design balances chip clearance and core strength for slotting and pocketing\u003c\/li\u003e\n\u003cli\u003e30-degree helix angle reduces cutting forces and improves surface finish\u003c\/li\u003e\n\u003cli\u003eCentercutting geometry enables direct plunge milling without a pilot hole\u003c\/li\u003e\n\u003cli\u003eLong-series length of cut (4 inches) supports deep-cavity work\u003c\/li\u003e\n\u003cli\u003eRight-hand cut, right-hand flute, uncoated — straightforward to resharpen\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-application long-series square end mill for any setup requiring a 1-inch diameter, 1-inch shank, 3-flute cobalt tool in OSG Series 536.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist. Secure the shank in a properly sized collet, end mill holder, or Weldon-style holder to the manufacturer-specified engagement depth before operating. Verify spindle runout is within acceptable tolerance before cutting; excessive runout accelerates edge wear on cobalt tooling. Always confirm the machine spindle is fully stopped and locked out before changing or inspecting the tool.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 4 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 6.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Flutes\u003c\/strong\u003e: 3\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\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\u003eCoating\u003c\/strong\u003e: Uncoated\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Long\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: 536\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: 5365100\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"OSG","offers":[{"title":"Default Title","offer_id":51746347188530,"sku":"5365100","price":213.97,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/db3b3acd06d39817d28c2241dd45e2e7.jpg?v=1788868721","url":"https:\/\/voomisupply.com\/products\/osg-5365100-square-end-mill-1-in-3-flute-cobalt-long","provider":"Voomi Supply","version":"1.0","type":"link"}