Abstract: An inexpensive, high capacity, and easy to install roller for engaging hot metal plates being transferred over a cooling bed plate transfer grid. An invertible block which may have a bearing is provided at each end of the axle for the roller. The bearing block is received in a cut-out in the upper edge of a respective elongate parallel grid member. The bearing block is clamped in the cut-out by a plate which is received in a pair of slots in forward and aft edges of the cut-out to clampingly overlie the bearing block. A lip on each of the bearing blocks is positioned and sized to abut a lateral surface of a respective grid member and a shoulder on the axle engages the bearing block for preventing movement laterally of the bearing, whereby the roller is restrained from movement axially.