The connecting rod shaft, marked with code K 33101, is an integral part of the engine’s powertrain, acting as the central axis around which the connecting rod pivots. This shaft must offer both torsional rigidity and fatigue resistance, as it is continuously subjected to rotational loads and high-frequency vibrations. In the Sulzer ZV40/48, it helps synchronize the movement of pistons with the crankshaft, contributing to engine efficiency and smooth operation across various load conditions.