Engine assembly fastening prolonging shaft

The utility model discloses an engine assembly fastening prolonging shaft and belongs to the technical field of tools special for engine assembly and disassembly. The engine assembly fastening prolonging shaft is provided with a stepped shaft, wherein one end of the stepped shaft is a square shaft head and an internal spline key is arranged at the other end of the stepped shaft. According to the engine assembly fastening prolonging shaft, production pressure caused by relying on an imported part of clients for a long time is relieved. The engine assembly fastening prolonging shaft costs less than the imported part by 50%, the engine assembly fastening prolonging shaft is 3-4 times longer than the imported part in replacement cycle and date of delivery is shortened to one month. Therefore, the engine assembly fastening prolonging shaft has the advantages that the production pressure, the maintenance cycle and cost accounting pressure of the clients are reduced and production efficiency is improved for the clie