clearance fit
clearance fit — noun
1. a type of connection between two machine parts where a small, intentional space
a type of connection between two machine parts where a small, intentional space is left between them so that one part can slide or rotate freely inside the other without getting stuck
A clearance fit between the steel shaft and bearing lets the shaft turn freely without overheating.
countable noun phrase: a clearance fit
The factory chose a 0.2-millimetre clearance fit for the smooth movement of the drawer slides.
collocation: a clearance fit of [measurement]
A clearance fit let the repair crew take the old water pump apart by hand.
Engineers specify a clearance fit wherever two metal parts must slide against each other.
- loose fit
more general, less precise; describes any connection with wiggle room, while clearance fit implies a specific engineering tolerance
- sliding fit
a subtype of clearance fit where the gap is small enough to guide motion but still allows free movement
- interference fit
the opposite type of fit where parts overlap intentionally and must be pressed together
- press fit
a common type of interference fit where one part is forced into a slightly smaller hole
用法筆記
Frequently contrasted with interference fit (緊配), where parts are intentionally made to overlap. In engineering drawings, the amount of clearance is specified in millimetres or micrometres. Common in contexts describing bearings, pistons, gears, and sliding mechanisms.