what are spur gears
Spur gears, sometimes referred to as straight-cut gears, are perhaps the most common form of parallel axis gear. The spur gear has a cylindrical shape with teeth cut parallel to the axis.The most common spur gears are external gears, where the teeth are located on the outside of the cylinder.Another variation is internal spur gears where the teeth are cut on the inside of the cylinder.In either case, spur gears are designed to mesh with mating parts located on parallel shafts.The teeth projecting from a spur gear are not straight-sided, as this would not allow for uniform motion.nother variation is internal spur gears where the teeth are cut on the inside of the cylinder. In either case, spur gears are designed to mesh with mating parts located on parallel shafts. The teeth projecting from a spur gear are not straight-sided, as this would not allow for uniform motion.