Differential (mechanical device)
Differential (mechanical device) From Wikipedia, the free encyclopedia (Redirected from Differential gear ) Jump to navigation Jump to search This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed. Find sources: "Differential" mechanical device – news · newspapers · books · scholar · JSTOR ( July 2015 ) ( Learn how and when to remove this template message ) A spur gear differential constructed by engaging the planet gears of two co-axial epicyclic gear trains. The casing is the carrier for this planetary gear train. A differential is a gear train with three shafts that has the property that the rotational speed of one shaft is the average of the speeds of the others, or a fixed multiple of that average. Contents 1 Functional description