Turning Formula Interactive 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:
D – Workpiece diameter at machining point (in inches)
DOC – Depth of cut (in inches)
rad – nose radius of insert (in inches)

SURFACE FEET PER MINUTE (SFM)
X X π/12 =

REVOLUTIONS PER MINUTE (RPM)
X ( 12 / π ) / =

INCHES PER REVOLUTION FEED RATE (IPR)
/ =

INCHES PER MINUTE FEED RATE (IPM)
X =

CUBIC INCHES PER MINUTE METAL REMOVAL RATE (in³/min)
X 12 X X =

Ra FINISH IN MICROINCHES µ in. (theoretical estimate only, invalid for round or wiper-style inserts)
( ² / ( 8 X ) ) X 333,333 =

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