| 摘要 |
PROBLEM TO BE SOLVED: To provide an inexpensively manufacturable gear excellent in engagement accuracy or strength of a tooth part.SOLUTION: A gear in which the peripheral edge shape of an engaging tooth part for engagement is formed by shear-punching to a workpiece comprising a metal plate has a recessed part which is smaller in thickness than an initial state of the workpiece on the gear surface between a tooth bottom and a tooth tip of the tooth part, and also has a thickness return part which is greater in thickness than a formation spot of the recessed part from the recessed part to the tooth tip side. |
