SFM to RPM Calculator

RPM (Revolutions per Minute):

Angular Speed (rad/s):

SFM to RPM Calculator

The relationship between SFM (Surface Feet per Minute) and RPM (Revolutions Per Minute) can be calculated using the following formula:

\( RPM = \frac{SFM \times 12}{\pi \times D} \)

Parameters:

- \( SFM \): Surface Feet per Minute (cutting speed).
- \( D \): Diameter of the workpiece (in inches).
- \( RPM \): Revolutions per Minute (to be calculated).

Example Calculation

If the SFM is 100 ft/min and the diameter of the workpiece is 2 inches:
\( RPM = \frac{100 \times 12}{\pi \times 2} \approx 191 \, \text{RPM} \)

Frequently Asked Questions

What is the purpose of this calculator?

This calculator helps determine the RPM of a rotating workpiece based on the surface speed (SFM) and diameter, useful in machining applications.

Can I use different units for SFM?

Yes, the calculator supports SFM in ft/min and m/min, converting all inputs to ft/min for calculation.

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