Abstract: A bevel gear system wherein a plastic adaptor of generally frustoconical shape has convergent teeth formed in a recessed frustoconical surface to snap fit over the bevel gear teeth of a more rigid drive gear and similarly has matching gear teeth on an exterior frustoconical surface in mesh with the teeth of a driven bevel gear, which formerly was driven by the teeth of the more rigid gear, and whose axial position has been changed to mesh with the teeth of the adaptor.