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 minute, revolutions and/or minute:
“Farce is tragedy played at a thousand revolutions per minute.”
—John Mortimer (b. 1923)
“Revolution? Unscrew the flag-staff, wrap the bunting in the oil covers, and put the thing in the clothes-chest. Let the old lady bring you your house-slippers and untie your fiery red necktie. You always make revolutions with your mugs, your republic—nothing but an industrial accident.”
—Alfred Döblin (1878–1957)
“That’s why I quit and took up writing poetry instead.
It’s clean, it’s relaxing, it doesn’t squirt juice all over
Something you were certain of a minute ago and now your own face
Is a stranger and no one can tell you it’s true. Hey, stupid!”
—John Ashbery (b. 1927)