unsprung axle

unsprung axle

[¦ən′sprəŋ ′ak·səl]
(mechanical engineering)
A rear axle in an automobile in which the housing carries the right and left rear-axle shafts and the wheels are mounted at the outer end of each shaft.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.