When selecting materials, it is necessary to determine based on the size, properties, and other working conditions of the load borne by the component. Dispersive hardening metal materials can be used to make it reinforced uniformly. Elastic couplings can compensate for axis offset and have high elasticity in torsion. They can also play a role in axial, radial, and axial directions, reducing the impact on gears during variable torque.

To improve the fatigue and wear resistance of metal components, surface coatings or other surface hardening treatments can be applied. Carbon spring steel has low price and good processability, but its heat treatment performance is poor, and it is commonly used in the manufacturing of small-sized spiral springs; It can be easily aligned during installation, compensating for errors caused by deformation of the hull and engine base after installation, and ensuring the normal operation of the diesel engine and shaft system.

Alloy spring steel has high strength and good hardenability, and can be used to manufacture springs under harsh working conditions. It has a certain degree of heat resistance and can be used for springs that need to withstand impact loads; Elastic couplings are materials with good corrosion resistance, heat resistance, and good processing performance, which can absorb fluctuations in the output torque of diesel engines. In diesel power devices equipped with reduction gearboxes, they play a certain protective role on the gears.

Elastic couplings have good resistance and vibration reduction characteristics. Couplings can absorb some vibration energy, reduce vibration and amplitude when passing through vibration points, and reduce torsional stress in shaft sections. Elastic couplings have good elasticity, with a turning angle of ten degrees when subjected to nominal torque and twenty-five degrees when subjected to high torque. They can reduce the natural vibration frequency of the shaft system and change the torsional vibration characteristics of the diesel power device shaft system.