{"product_id":"iscar-3398260-ball-end-mill-0-25-in-4-flute-carbide","title":"Iscar 3398260 Ball End Mill 0.25 in 4 Flute Carbide","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe ISCAR 3398260 is a solid carbide ball end mill engineered for high-performance milling in demanding machining environments. With a 0.25-inch cutting diameter and a 1-inch length of cut, it delivers precise ball-nose profiling on contoured surfaces, 3D features, and complex geometry. The four-flute design with a 38-degree helix angle promotes smooth chip evacuation and improves surface finish at elevated feed rates. A TiAlCN coating provides thermal resistance and extended tool life when cutting hardened steels, stainless, and high-temperature alloys. This end mill is a single-end tool from the ISCAR Flash Solid series, intended for use by machinists and toolroom professionals on CNC machining centers.\u003c\/p\u003e\u003cp\u003eThe 3398260 is suited for finish and semi-finish milling operations on ferrous and non-ferrous materials where a ball-nose profile is required. The variable index geometry helps reduce chatter and harmonic vibration during deep-cavity or high-speed machining passes. With a 0.25-inch shank diameter and a 3-inch overall length, it fits standard collet chucks and end mill holders commonly used in vertical and horizontal machining centers. Right-hand cut and right-hand flute direction are standard for conventional CNC spindle rotation.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e0.25-inch ball nose diameter for contour milling and 3D surface work\u003c\/li\u003e\n\u003cli\u003e4 flutes with a 38-degree helix angle for efficient chip flow and improved finish\u003c\/li\u003e\n\u003cli\u003eTiAlCN coating for high-heat resistance and extended tool life on hardened materials\u003c\/li\u003e\n\u003cli\u003eVariable index flute spacing reduces vibration and chatter\u003c\/li\u003e\n\u003cli\u003eSolid carbide construction for rigidity and dimensional accuracy\u003c\/li\u003e\n\u003cli\u003eSingle-end design from the ISCAR Flash Solid series\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement and standard tooling option compatible with CNC machining centers and manual mills using 0.25-inch collet chucks or end mill holders with right-hand spindle rotation.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a qualified machinist or toolroom technician. Ensure the spindle is fully stopped and the machine is locked out before changing tooling. Seat the shank fully into the collet or holder to the recommended gauge-line depth and torque the retention hardware according to the toolholder manufacturer specification. Inspect the cutting edges for chips or damage before each use.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMill Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength of Cut\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOverall Length\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShank 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\u003eHelix Angle\u003c\/strong\u003e: 38 degrees\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCoating\u003c\/strong\u003e: TiAlCN\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd Mill Material\u003c\/strong\u003e: Solid Carbide\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\u003eSingle or Double End\u003c\/strong\u003e: Single\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Index\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries\u003c\/strong\u003e: Flash Solid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.1 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ISCAR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 3398260\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ISCAR","offers":[{"title":"Default Title","offer_id":51731785056562,"sku":"3398260","price":73.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/de2d226952e867e2ae178b8dfbf13561.jpg?v=1788734911","url":"https:\/\/voomisupply.com\/products\/iscar-3398260-ball-end-mill-0-25-in-4-flute-carbide","provider":"Voomi Supply","version":"1.0","type":"link"}