The spindle or axle, n.2 of any wheel; the ‘axle’ in the wheel-and-axle. Obsolete.

The axle of a wheel. ? Obsolete.

The axle or spindle on which a wheel revolves, esp. in clocks and watches. (Cf. axle-tree, n.) arbor-chuck: (see quot.)

= axle, n.2 Obsolete.

The centre-pin or spindle upon which a wheel revolves, or which revolves along with it. A central spindle of a wheel which revolves along with it, as…

an axle-tree (cf. turn-beam n. at turn-, comb._form affix).

a short rod, pin, or other protuberance serving as an axis or pivot; cf. sense 7b.

(see quots.).

(a) the driving-axle of an engine or machine; (b) a carriage axle with the ends bent twice at a right angle, so as to lower the carriage-body and…

With the meaning ‘banjo-shaped’, as banjo axle, banjo union.