| 摘要 |
PURPOSE: A shaft for an auto transmission and a machining method thereof are provided to improve the durability of a shaft by removing minute crack generated when forming an oil hole. CONSTITUTION: A shaft for an auto transmission comprises a hollow which is formed lengthwise to supply lubricant to a clutch and a planetary gear of an auto transmission, an oil hole(100) connected to the hollow, a straight portion(110) in which the oil hole is connected to the hollow, and a curved portion(120) formed on the upper side of the straight portion. |
