The rpm full form is Revolutions per minute. It is a measurement of rotational frequency, or the number of revolutions per minute. It indicates the number of times a mechanical component rotates around its axis in one minute. The rotational speed of a mechanical component, such as an engine’s crankshaft, a power generation turbine, a CD or DVD player, or a turbocharger, is defined as RPM.

• Modern air turbine dental drills have a spinning speed of up to 13.3 kHz (800,000 RPM).
• The rotating speed of a second-hand conventional analogue clock is 1 RPM.
• DVD devices read discs at a constant linear rate as well.
• When the disc is examined, the rotation frequency ranges from 1530 RPM at the innermost periphery to 630 RPM at the outermost periphery.
• The rotational speed of a washing machine’s drum can range from 500 to 2,000 RPM during the spinning cycles.

The tachometer in a car’s dashboard is a common example of how to comprehend RPM. It displays the engine’s rotational frequency. It counts how many times an engine’s crankshaft rotates around its axis in one minute. A tachometer usually measures RPM in thousands, so if the needle is at 3, the engine is turning at 3000 rpm and the crankshaft is spinning 3000 times per minute.