Item #264 Seco R220.21-4.00-R160.7A 4″Facemill W/Inserts 1.5″ Arbor The Seco R220.21-4.00-R160.7A is a heavy-duty 4-inch indexable face mill primarily designed for high-feed milling operations. It features a standard 1.5-inch arbor/bore diameter and contains 7 insert pockets, making it ideal for aggressive material removal in industrial machining. Key Specifications. Tool Type: Indexable High Feed Face Mill. Cutting Diameter: 4.0 inches. Bore / Pilot Diameter: 1.5 inches. Number of Pockets: 7. Insert Compatibility: Typically uses Seco insert styles (such as the 218.19-160T-04 or similar series) designed specifically for high-feed rates. Coolant: Features integrated through-spindle coolant capability for optimal tool life and chip evacuation Applications & Use This face mill is engineered for roughing and facing large workpieces where high feed rates and high metal removal rates are required. The high-feed geometry directs cutting forces primarily into the spindle, reducing vibration and extending tool life in demanding environments. If you need to verify insert availability, find the correct torx screws, or source replacement parts for this cutter, we can look up compatible tooling arrays.