What materials are used for motor shafts?

Motor shafts are typically made of metal to ensure sufficient strength, rigidity, and wear resistance. The choice depends on the specific application and performance requirements.

Common materials include:

Carbon steel: Such as high-quality 45# carbon structural steel, widely used in small and medium-sized motors, possessing good mechanical strength and machinability.

Alloy steel: Used in large or high-load motors, offering higher strength and toughness, especially suitable for high-speed, heavy-load conditions.

Stainless steel: Used in environments requiring corrosion resistance; some micro-motors also use non-magnetic stainless steel (such as 1Cr18Ni9Ti).

Aluminum alloy: Used in lightweight motor designs, such as drive motors in new energy vehicles, balancing strength and weight reduction.

High-strength engineering plastics: A small number of small, low-power motors use this material to reduce cost and weight, but its application is limited.

Furthermore, the manufacturing method of the shaft also affects the choice of materials:

Smaller diameter shafts are mostly machined from hot-rolled round steel; while larger motor shafts often use forged steel to improve mechanical properties.