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Do all electric motors have bearings?

Most electric motors in industrial facilities consist of rolling element bearings, either ball bearings or roller bearings.

Electric motors are used in a wide range of applications, from household appliances to industrial machinery. Bearings are an important component in contemporary machinery and equipment. Their main function is to support the mechanical rotating body, reduce the coefficient of friction during its movement, and ensure its rotary accuracy. Therefore, when using motors, some people may ask whether all motors have bearings. If you happen to have such a question, this article can just solve your doubts.

The role of bearings

Bearings are used to support and guide the motor's rotating shaft for smooth, efficient rotation and are a key component in ensuring the long-term reliability and performance of the motor. They also help reduce friction and wear between the shaft and motor housing. Bearings provide the necessary support and stability for the rotation of the motor. For example, in a brushed DC motor, there are usually two bearings supporting the motor's armature shaft. In an induction motor, there are usually two bearings supporting the rotor shaft and one bearing supporting the stator shaft.

But do all motors have bearings? The answer is no. Although bearings play a large role in the operation of a motor, they are not a necessary part of the motor's operation. Some types of motors do not use bearings, such as the simple single-pole motor. This type of motor consists of a wire or conductor that rotates between the two poles of a magnet and does not require any bearings.

Types of Bearings

The type of bearing used in an electric motor will vary depending on the size, speed and other design factors of the motor. The most common types of bearings used in electric motors are ball bearings and roller bearings. Ball bearings are typically used in smaller motors and provide low friction support for the shaft. Roller bearings are used in larger motors and provide higher load capacity and greater stability.

Lunyee's AC motoruses high-precision silent ball bearings, which can ensure that the motor runs without shaking under high load, making the motor more long-lived.


In summary, while some types of motors do not use bearings, most motors do rely on bearings to provide support and stability. The type of bearing used in an electric motor may vary depending on the design and operating characteristics of the motor.

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