The key component in most rotating equipment is the shaft. A shaft is the mechanical component for transmitting torque and rotation. Shaft size greatly affects the torque in these machines. Hence, the precise design and prototyping of shafts is crucial for all applications.
Choosing the proper material can maximize reliability. When considering the best material for your electric motor shaft, there are several considerations: Cost and Material Deficiencies.
The material used for ordinary shafts is mild steel, but when high strength is required, an alloy steel such as nickel, nickel-chromium or chromium-vanadium steel is used.
Most motor manufacturers use SAE 1045 in either cold-rolled (CRS) or hot-rolled steel (HRS). C1045 is a medium carbon, medium tensile steel supplied as forged or normalized. This steel shows good strength, toughness and wear resistance.