Tool Coatings

Cutting Data Formulae and Legend

Formulas

Feed per Tooth
IPT= IPM ÷ Z ÷ RPM
Spindle Speed
RPM = SFM x 3.82 ÷ D
Table Feed
IPM= IPT x Z x RPM
Cutting Speed
SFM= D x 0.26 x RPM
Inch (Feed) per Revolution
IPR (FR) = IPM ÷ RPM
Metal Removal Cubic Inches per Minute
MR= IPM x RDC x ADC

Legend

D = Tool Diameter
Z = No. of Flutes
FR = Feed per Revolution
IPM = Table Feed
IPR = Inch per Revolution
IPT = Feed per Tooth
SFM = Cutting SpeedRPM = Spindle Speed
ADC = Axial Depth of Cut (Length)
HP = Actual Horsepower Available at running RPM
PC = Power Constants for HP (HP/Cl-MR)
RDC = Radial Depth of Cut (Width)
MR = Metal Removal Rate (Cubic Inches per Minute)