A pin inserted through holes at the end of an axle or shaft, so as to secure a wheel or shaft-mounted device.
A central cohesive source of stability and security; a person or thing that is critical to a system or organisation.
To adopt as, or serve as, a central cohesive source of stability and security.
A shaft, held by a bearing, at each end or side of a rotatable object.
A similar rotational bearing comprising a rotating arc or ring sliding in the groove of a stationary arc, used in machinery to allow a workpiece to be moved relative to a fixed tool.
A similar rotational bearing used in automotive suspensions.
One of the short stubby bearings on either side of a cannon; a gudgeon.