Surface Speed Calculator

Calculate Surface Speed



Formula

To calculate the Surface Speed (SFM):

\[ SFM = \pi \times D \times RPM \]

Where:

Surface Speed Definition

A surface speed, often referred to as SFM, is a term used in machining to describe the tangential velocity of a rotating piece of stock in a spindle. This unit is used in converting the spindle rotation into the velocity of this stock which is used for determining certain feed rates etc. for machining the material.

Example Calculation

Let's assume the following values:

Using the formula:

\[ SFM = \pi \times 2 \times 1000 = 6283.19 \text{ inches/minute} \]

The Surface Speed is 6283.19 inches/minute.