also: がんぎぐるま
escape wheel
Technical term in horology: the toothed wheel that interacts with the pallet fork in a mechanical timepiece.
When the escape wheel of a watch wears out, accuracy decreases.
Rare alternative meaning; in some contexts ガンギ車 can refer to a pulley, but this usage is uncommon and may be obsolete or dialectal.
In old documents, ガンギ車 is sometimes used to mean a pulley.