Main Shaft

The main shaft of the wind turbine transfers the rotational force of the rotor to the gear box. Depending on the size of the main shaft, there are two kinds of materials used. For main shafts in small turbines such as under 3 MW, the material is of a forgedalloy steel type. In big turbines over 3 MW, the main shaft’s material is made from GGG40 or 50.