Embodiments of hobby servo motor devices are disclosed. Embodiments include a hobby servo motor having an output shaft and a planar surface that is perpendicular to the output shaft. Embodiments also include a gear attachment mechanism having a top planar surface, a bottom planar surface, and an outer surface having gear engaging teeth. The gear engaging teeth extend from the bottom surface to the top surface. The top surface is in contact with the hobby servo output shaft. The gear attachment mechanism bottom planar surface is flushly engaged to the hobby servo planar surface.