Abstract
Two types of super gears with small transmission error regardless of tooth loads are proposed. One is a zero-transmission-error gear (ZT gear) the tooth surface of which is modified three-dimensionally. The other is a meshing-restriction-gear (MR gear) the tooth tip of which cut off the tooth tip obliquely to control tooth stiffness. Both gears were made and their vibration and noise were examined. It was confirmed that both gears bring low noise and low vibration characteristics.
