machine-hour

English

Etymology

Compound of machine +‎ hour, although, as with any such unit of measure (e.g., ton-miles, newton metres), the mathematical relationship of multiplication is simultaneously involved: X machines working during Y hours = X × Y = Z machine-hours.

Noun

machine-hour (plural machine-hours)

  1. The amount of work that can be done by one machine in one hour; a billable hour for one machine. (Said of, for example, a piece of heavy equipment or a machine tool.)
    Coordinate terms: person-hour, man-hour
    With the right carbide tooling and toolpath programming, you're not looking at too many machine-hours for a job like this. If you're going to putz around with cheaper tooling and guesstimated feedrates, then you'll pay for those in more machine-hours.
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