Revolutions per minute (abbreviated rpm, RPM, r/min, or r·min−1) is a measure of the frequency of a rotation. It annotates the number of full rotations completed in one minute around a fixed axis. It is used as a measure of rotational speed of a mechanical component.
Standards organizations generally recommend the symbol r/min, which is more consistent with the general use of unit symbols. This is not enforced as an international standard. In French for example, tr/mn (tours par minute) is commonly used, and the German equivalent reads U/min (Umdrehungen pro Minute).
Read more about Revolutions Per Minute: International System of Units, Examples
Famous quotes containing the words revolutions per, revolutions and/or minute:
“Farce is tragedy played at a thousand revolutions per minute.”
—John Mortimer (b. 1923)
“Men go out to admire the heights of mountains, the huge waves of the sea, the broadest spans of rivers, the circle of ocean, the revolutions of stars, and leave themselves behind.”
—St. Augustine (354–430)
“In a minute there is time
For decisions and revisions which a minute will reverse.”
—T.S. (Thomas Stearns)