by Robert Fogt on 10/30/05 at 03:03:15. Yes you can convert that, if you know the circumference of the wheel. For example, if a wheel is exactly 1 **meter** in circumference, than **RPM** = **meters**/**minute**. If the wheel is 2.5 **meters** in circumference than 1 **RPM** = 2.5 **meters**/**minute**. **RPM** is revolutions/**minute**. The distance the wheel travels (in **meters**) in ....

The speeds shown are given in Surface Feet **Per Minute** (SFM) or Surface **Meters Per Minute** (m/**min**), measured at the periphery of thedrill. To **calculate** thedrill revolutions **per minute** (**RPM**) from the surface speeds, the following formulae should be used, where D=diameter of drill. m/**min** = 3.142 x DIAMETER x **RPM**.

Turning Surface Feet per **Minute** = 0.262 x Part Diameter x **RPM** How does SFM calculate **RPM**? Surface Feet per **Minute** = (**RPM** x Circumference) / 12 Note: The circumference unit is in inches and is dependent on if it's a milling or turning operation. For milling operations, the circumference is of the cutter (tool in the spindle).