Conveyor trolley wheel assembly

A wheel for use in a conveying system comprising a guide track in or on which the wheel is adapted to roll, said wheel being adapted to be mounted from a support means intended to carry a load along said guide track, said wheel including shaft member means adapted to be connected to said support means, a wheel body formed of polymer materials having an outer peripheral surface adapted to roll along said guide track, and dry bearing means axially extending between said shaft member means and said wheel body, said bearing means having an inherent dry coefficient of friction adapted to permit rotation of said dry bearing means on said shaft member means during rolling of said wheel along said guide track, first retainer means extending outwardly from said shaft member means at an outboard end of said shaft member means relative to said support means, said first retainer means having an outer perimeter located at a radial distance intermediate the outer peripheral surface of said wheel body and an outer diameter of said shaft member means, said bearing means further having a first axially facing bearing surface having a radially outer edge at a radial distance at least equal to that of said outer perimeter of the first retainer means whereby sliding bearing contact occurs between said first axial facing bearing surface and an inner surface of said first retainer means, and connection means co-operating with said shaft member means and positively preventing axial pressure being applied to radial faces of said wheel body beyond a predetermined limit permitting operational rotation of said wheel body when assembled.