The Nanocut Technologies BT40 FMB 27–100 is a premium-grade, high-rigidity face milling arbor designed for BT40 taper tooling systems. Featuring a 27 mm pilot diameter and 100 mm maximum cutter mounting length, it delivers exceptional concentricity (<0.005 mm), dynamic balance (G2.5 @ 10,000 RPM), and thermal stability for demanding CNC face milling applications. Precision-ground from hardened alloy steel with black oxide coating for corrosion resistance and extended service life. Ideal for aerospace, automotive, and mold & die machining where repeatability, surface finish, and tool life are critical.