A hand tool consisting of a crank which holds a fitted rotating drill bit tip, designed to bore holes in rigid materials, by cutting a disc in a spiral fashion.
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.
A shaft, held by a bearing, at each end or side of a rotatable object.
One of the short stubby bearings on either side of a cannon; a gudgeon.