Anti-friction wheels

(Mach.) wheels turning freely on small pivots, and sustaining, at the angle formed by their circumferences, the pivot or journal of a revolving shaft, to relieve it of friction; - called also friction wheels.

See also: Friction

References in periodicals archive ?
This excavating wheel is an "open wheel', that is to say, it has no axle but it revolves on anti-friction wheels placed just outside the rim of the excavating wheel.