LUT Technical application of deep groove ball bearings in electric motors

Deep groove ball bearings are the most common rolling bearings. Its structural features are relatively simple, convenient to use, durable, and it plays many functions, with the most common technological applications in various industries. Next, Lutai Bearing Co., Ltd. will explain in detail its technical application in motors.

Deep groove ball bearings are the most frequently used bearing type in motors. Its key function is to bear axial loads, but when expanding the axial clearance of rolling bearings, it has the necessary characteristics of angular contact ball bearings and can bear radial and radial synergistic loads. When the rotational speed is relatively high and it is not suitable to use thrust ball bearings, they can also be used to bear pure radial loads. The reason why deep groove ball bearings are widely used in motors is mainly due to their quiet operating performance, as well as other characteristics such as low friction, low lubrication pressure, and good high-speed performance. Deep groove ball bearings can withstand both radial and bi-directional axial loads simultaneously. They can be used as both floating bearings and fixed bearings. It is possible to use two floating bearings (drive end and non drive end) in the motor, but each floating bearing should be pre tensioned axially with a spring to reduce vibration and noise.

There are many types of products for deep groove ball bearings, and products with dust covers and sealing rings at both ends can be provided. Among them, there are iron cover seals or rubber cover seals, which prevent dust from entering the interior of the bearing. The bearing balls are protected by both lubricating oil and seals, ensuring lifelong maintenance free.

Technical application of rolling bearings in motors

The motor is divided into: drive end, non drive end, bearing chamber, spring, motor shaft, drive end bearing, armature, non drive end bearing, and fan. Below, the company will focus on recommending common types of bearings in motors:

Deep groove ball bearings are the most commonly used type of bearing in electric motors;

Cylindrical roller bearings, NUP and NJ series with a corner ring HJ, which can withstand bidirectional axial loads, are commonly used in traction motors and vibration motors;

The application of angular contact ball bearings in vertical motors (V-type motors) is more diverse; Angular contact ball bearings can withstand unidirectional axial forces. In technical applications where the direction of axial force may change, two angular contact ball bearings arranged in an X or O shape can be used.

Spindle bearings are commonly used in high-speed technology applications, such as the high-speed motor rotor shaft of machine tools, which is also known as the machine tool spindle.

Conical roller bearings, commonly found in some special motors, are the four best choices when the motor shaft is subjected to relatively large axial forces from the gearbox or other components.

Self aligning roller bearings, suitable for heavy-duty working conditions with high load-bearing capacity, can withstand axial forces in two directions and high radial forces. Due to the close fit between the roller and the rolling, the stress distribution is relatively uniform.