mm/min

millimeter per minute

Speedexact by definition

The millimetre per minute is 1/60,000 of a metre per second. It is the feed rate unit of metric CNC machining: a G-code F word in millimetre mode is millimetres per minute, and typical milling feeds run from tens to a few thousand.

Watch out: G-code feed rate flips meaning with the units mode. In G21 (metric) an F value is mm/min; in G20 (inch) the same F value is inches per minute, which is 25.4 times faster. Sending a metric program to a machine left in inch mode is a well-known way to break a tool.

1 mm/min 0.000016666667 m/s