※Cutting Speed (Vc)

Vc=π×Ds×n/1000 Vc (m/min)：Cutting Speed Ds (mm)：Cutter Diameter π (3.14)：Pi n(min-1)：Main Axis Spindle Speed

 

※Feed rate (fz) fz= Vf/Zxn	fz(mm/t)：Feed per tooth Vf(mm/min)：Feed rate Z：Number of flutes n(min-1)：Revolution

※Cutting Power (Pc) Pc= (Ks×Q)/(9120×η) = (Ks×ae×Vf×ap)/(6120000×η) =(Ks×ae×fz×Z×n×ap)/(6120000×η) PHP=(6120/4500)×Pc

Pc(kW)：Cutting power PHP(HP)：Cutting power ae(mm)：Cutting width Vf(mm/min)：Cutting speed fz(mm/t)：Feed per tooth Z：Number of flutes n(min-1)：Revolution ap：Cutting depth Ks (kgf/mm2)：Relative cutting resistance η(0.7~0.8)：Mechanical efficienc Q(cm3/min=cc/min)：Chip removal Volume

 

Approximate rate (Ks)
Mild Steels	190
Medium Steels	210
Hard Steels	240
Light Alloy	190
High Alloy	245
Cast Iron	93
Forging cast iron	120
Bronze / Brass	70

 

※Chip removal Volume (Q)

Q=(ae×Vf×ap)/1000 =(ae×fz×Z×n×ap)/1000

Q (cm3/ min)：Chip removal Volume ae(mm)：Cutting width Vf(mm/min)：Cutting speed fz(mm/t)：Feed per tooth Z：Number of flutes n(min-1)：Revolution ap (mm)：Cutting depth

※CUTTING TIME (T)

T= (60×L′)/Vf = (60×L′)/fz×Z×n

T(sec) ：Cutting Time
L′(mm)：Total table feed length(=L+Ds+2α)
L(mm)：Workpiece length
Ds(mm)：Cutter diameter
α(mm)：Grinder diameter
Vf(mm/min) ：Feed rate per minute of table
fz(mm/t)：Feed per tooth
Z：Number of flutes
n(min-1)：Revolution