Mr. Gears spur gears are designed to transmit motion or power between parallel shafts. Configurations include spur,rack,pinion wire,stem pinons, and internal gears; most with a selection of bores, keyways and set screws. Fine-pitch gears are available in plastic, brass, stainless steel and steel. Heavier pitch spurs are available in steel and cast iron. Styles include plain,web,web with lightening holes or spoked. Change gears have consecutive numbers of teeth for a variety of ratios. Splines and Spline Shafts that are involute or straight - internal and external Splines are available.