Features: The integrated design of the handle increases rigidity; 5+1 design, in order to ensure Rz40-60, one blade is a broken blade; Reaming + chamfering + countersinking; Unequal design to avoid vibration; Parameter: Linear velocity Vc(m/min): 450 Cutting tools diameter(mm): 48 Rotate speed (1/min): 2986 Teeth number: 6 Feed per teeth fz(mm): 0.1 Feed F(mm): 1791 Cutting-in Ap(mm): --