INTERACTIVE TURNING FORMULA CALCULATOR

 

The interactive turning formula calculator works for any case variable in bold. Enter the values on the cells on the equation's left side and click the "Solution" button. The answer will appear in the cell on the right side of the equation.

Legend:
D - Workpiece diameter at machining point (in inches)
DOC - Depth of cut (in inches)
IPR - Inches per revolution
SFM - Surface feet per minute
IPM - Inches per minute
rad - nose radius of insert (in inches)
SURFACE FEET PER MINUTE (SFM)
Enter RPM Enter D Solution
X X 𝝅/12 =
            
REVOLUTIONS PER MINUTE (RPM)
Enter SFM Enter D Solution
X (12/𝝅) / =
           
INCHES PER REVOLUTION FEED RATE (IPR)
Enter IPM Enter RPM Solution
/ =
          
INCHES PER MINUTE FEED RATE (IPM)
Enter RPM Enter IPR Solution
X =
             
CUBIC INCHES PER MINUTE METAL REMOVAL RATE (in³/min)
Enter SFM Enter IPR Enter DOC Solution
X 12 X X =

            
Ra FINISH IN MICROINCHES µ in. (theoretical estimate only, invalid for round or wiper-style inserts)
Enter IPR Enter rad Solution
( ² /(8X )) X 333,333 =
              
RMS ROOT MEAN SQUARE IN MICROINCHES µ in. (theoretical estimate only, invalid for round or wiper-style inserts)
Enter IPR Enter rad Solution
(( ² /(8X )) /3) X 370,000 =