Turning tools A Cutting time Tc for face milling π × (a2 b2) T = [min] C 4000 × Vc × f

Tc: Cutting time [min] Vc: Cutting speed [m/min] f: Feed rate [mm]

B

Theoretical surface roughness R f 2 R = ×1000 [μm] 8r c

R: Surface roughness [μm] f: Feed rate [mm] rc: Radius of insert [mm] Example: f = 0,2 mm, rc = 0,4 mm

C

D

E