{"product_id":"seco-17016578-roughing-end-mill-0-25in-4-flute-ticn-cobalt","title":"Seco 17016578 Roughing End Mill 0.25in 4 Flute Ticn Cobalt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe SECO 17016578 is a single-end roughing end mill machined from M42 cobalt high-speed steel and coated with titanium carbonitride (TiCN). Designed for aggressive material removal, the four-flute spiral geometry with a 30-degree maximum helix angle drives chips clear of the cut while maintaining edge stability under heavy load. The 0.25-inch cutting diameter pairs with a 0.375-inch shank, giving it rigidity in standard end mill holders. This tool is center-cutting, so it can plunge directly into workpiece material without a pre-drilled pilot hole. Machinists and tool-and-die technicians are the primary users in job shop, production, and maintenance environments.\u003c\/p\u003e\n\u003cp\u003eThis end mill is suited for roughing passes in ferrous and non-ferrous metals where high material removal rate and heat resistance are priorities. The TiCN coating adds surface hardness and reduces friction at the cutting edge, extending tool life in interrupted cuts and harder alloys. The regular-length configuration with a 1.25-inch length of cut and 3.0625-inch overall length fits standard CNC machining centers and manual knee mills without requiring extended-reach toolholders. Coolant-through capability is not included, so flood or mist coolant applied externally is the recommended approach for heat management.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eM42 cobalt high-speed steel substrate for elevated heat and wear resistance over standard M2 HSS\u003c\/li\u003e\n  \u003cli\u003eTiCN coating increases surface hardness and reduces built-up edge formation\u003c\/li\u003e\n  \u003cli\u003eFour right-hand spiral flutes with 30-degree maximum helix angle for efficient chip evacuation\u003c\/li\u003e\n  \u003cli\u003eCenter-cutting design allows direct plunge entry into workpiece material\u003c\/li\u003e\n  \u003cli\u003e0.375-inch shank diameter provides rigidity in collet chucks and end mill holders\u003c\/li\u003e\n  \u003cli\u003eSingle-end, regular-length configuration for general-purpose roughing applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a general-purpose roughing end mill compatible with standard 0.375-inch end mill holders, collet chucks, and milling machine spindles 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 powered down and locked out before changing tooling. Seat the 0.375-inch shank fully into the holder and torque the retention hardware per the toolholder manufacturer specifications. Verify runout with a dial indicator before initiating a cut, as excessive runout accelerates edge wear on roughing geometries.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.25 inches\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: 1.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3.0625 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter\u003c\/strong\u003e: 0.375 inches\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\u003eCoating\/Finish\u003c\/strong\u003e: TiCN\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Helix Angle\u003c\/strong\u003e: 30 degrees\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\u003eFlute Type\u003c\/strong\u003e: Spiral\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Type\u003c\/strong\u003e: Regular\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCenter Cutting\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCoolant Through\u003c\/strong\u003e: No\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMill Diameter Tolerance\u003c\/strong\u003e: +0.003 to -0.000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter Tolerance\u003c\/strong\u003e: -0.0001 to -0.0005 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOverall Length Tolerance\u003c\/strong\u003e: +0.062 to -0.000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: REC700\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.3 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: SECO\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 17016578\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SECO TOOLS","offers":[{"title":"Default Title","offer_id":51562101539122,"sku":"17016578","price":98.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/75034769c6bcafee62465e34d1cfb3f7_f0a5f9b0-985b-4adc-ad46-6e2c5491f698.jpg?v=1786471623","url":"https:\/\/voomisupply.com\/products\/seco-17016578-roughing-end-mill-0-25in-4-flute-ticn-cobalt","provider":"Voomi Supply","version":"1.0","type":"link"}