Why are DC motor shafts cut and machined?

DC motor is a kind of motor widely used in various industrial and civil fields, but have you ever wondered why the shaft of a DC motor has a cutting process? In fact, this is determined by the DC motor's shaft material selection and manufacturing process.

First of all, the shaft of a DC motor is usually made of high-strength and high-toughness steel, such as 40Cr, to ensure the strength and wear resistance of the shaft. However, due to the high hardness of these steels, it is relatively difficult to process them, and manufacturing the shaft requires high processing technology.

During machining, the shaft holder needs to be rotated on a lathe, and then cut and polished using specialized machining tools to ensure the precision and finish of the shaft. Secondly, the shaft of the DC motor also needs surface treatment to improve the hardness and wear resistance of the shaft surface. Heat treatment or chemical treatment is generally used to ensure the service life and reliability of the motor by improving the hardness and strength of the shaft surface.

As the manufacturing of DC motor shafts requires high-precision machining and surface treatment technology, there will be a cutting process to ensure the quality and performance of the shaft. Although this has a certain technical threshold for the manufacturing process, it also makes the service life of a single motor more reliable and longer, which is of great significance for improving the productivity and quality of industrial and civil fields.

So we can see that the cutting process on the shaft of a DC motor is not for negative reasons but to ensure the quality and long-term reliability of the motor.