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Table 2 Parameters and their levels in ball nose milling

From: Application of response surface methodology for prediction and modeling of surface roughness in ball end milling of OFHC copper

Parameter Symbol (units) Levels
−2 −1 0 1 2
Cutting speed Vc (m/min) 80 85 90 95 100
Cutting feed rate fz (mm/ tooth) 0.01 0.04 0.07 0.10 0.13
Axial depth of cut ap (mm) 0.1 0.2 0.3 0.4 0.5
Radial depth of cut ae (mm) 0.05 0.07 0.09 0.11 0.13