INTERACTIVE DRILLING FORMULA CALCULATOR

Solve for any subject variable in bold by entering values in the boxes on the left side of the equation and clicking the "Calculate" button. The solution will appear in the box on the right side of the equation. To enter a value, click inside the boxes containing the "Enter" prompts.

Legend:

 

- Drill diameter (in inches)

IPR - Inches per revolution

SFM - Surface feet per minute

IPM - Inches per minute

Z- Number of flutes

IPT - Inches per tooth

RPM - Revolutions per minute

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 IPT      Enter Z       Solution
X =
         
INCHES PER MINUTE FEED RATE (IPM)
      Enter RPM       Enter IPR      Solution
X =
           
INCHES PER TOOTH FEED RATE (IPT)
      Enter IPM       Enter RPM          Enter Z Solution
/ / =
          
CUBIC INCHES PER MINUTE METAL REMOVAL RATE (in³/min)
      Enter RPM       Enter IPR        Enter D Solution
X X =