Abstract: A drive feed roller assembly for advancing a consumable filler wire to a nozzle, or the like, in a welding apparatus. The drive roller assembly includes a plurality of individual roller segments or wafers mounted axially on a rotatable drive shaft generally concentric with the axis of rotation thereof for rotation therewith. Each roller segment has a generally concentric peripheral groove for engaging and advancing the consumable filler wire to the nozzle. Each roller segment is removable from the drive shaft for selectively interchanging the roller segments in different side-by-side arrangements axially on the drive shaft to permit placement of any one of the roller segments in position for engaging the filler wire. A clamp is provided for holding the roller segments axially on the drive shaft in any side-by-side arrangement.