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Selection of Motor Shaft Blanks

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It is applied to the motor shaft in many machines. It is generally made by rolling round steel or forgings through its cutting. If the required shaft diameter is relatively small, it can be processed with round steel bars. If the shaft is relatively large, The diameter of the steps varies significantly and can be machined using forgings. In order to save raw materials and improve manufacturability, generally, the shaft with a relatively large diameter can be hollow inside, and for those shafts with more complex shapes, a casting process is generally used. The following manufacturers will introduce to you the choice of processing technology.

1. Selection of blanks

For motor shafts where the diameter of the shaft section does not change significantly, and the installation position is not very important, generally, manufacturers use rolled round bars to make shaft blanks, and in some conditions can use cold drawn round steel. If the load of the shaft is relatively large and the diameter has a significant change, forging is generally used. If it is a shaft with a relatively complex shape, casting blanks can be selected during production.

2. Select the appropriate material according to the conditions of use

Most shafts need to bear not only a bending moment but also torque, so they need to work under variable stress conditions, which require the materials used to meet certain toughness and strength, and even sometimes require materials to have wear resistance. Among many materials, carbon structural steel is more commonly used, especially 45 steel can have good comprehensive mechanical properties after quenching and tempering.

For shafts that are not very important, some manufacturers will also use carbon structural steel such as Q235 and Q275 to produce them. If the load is heavy and the force is heavy, alloy structural steel needs to be used as the raw material.

Third, the surface treatment process can effectively improve the mechanical properties

Through the cold work hardening process, the motor shaft can improve the surface quality and improve the fatigue strength of the shaft. The cold work hardening process includes shot peening, rolling, etc., among which, the shot peening will cause a thin layer of plasticity on the surface of the shaft. Deformation can reduce the roughness of the surface and eliminate micro-cracks.

Ningbo Shitai Precision Machinery Co., Ltd. is a motor shaft manufacturer and other products such as spline shafts, welcome to visit our official website.

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