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What are the best brands of ball bearings?

I. Common ball bearing materials

1. chrome steel (GCr15): chrome steel bearings are widely used in general mechanical equipment, and has a high load carrying capacity and wear resistance. Due to the good hardenability of chrome steel, so it can also improve its performance through heat treatment. However, the corrosion resistance of chrome steel itself is poor, and it is easy to rust in a wet environment.

2. Stainless steel (SUS440, SUS304): Stainless steel bearings are mainly used in high-speed and high-temperature environments, and have good corrosion resistance. However, the hardness and strength of stainless steel is low, the bearing capacity is also correspondingly weak, so it is usually used only for low load and high-speed operation.

3. Ceramic (Si3N4, ZrO2): ceramic bearings have excellent hardness, strength and wear resistance, so they are more widely used in high-speed, high-temperature, vacuum and corrosive environments. Moreover, ceramic bearings are lighter in weight and have less friction, so they are also widely used in precision machines and aerospace components.

Second, the influence of material selection

1. Load carrying capacity: The load carrying capacity of bearings is the primary factor that must be considered when choosing materials. Generally speaking, chrome steel has the strongest load carrying capacity, while stainless steel and ceramic bearings have relatively weak load carrying capacity.

2. Wear resistance: Ball bearings need to run frequently, so the choice of material is crucial to their wear resistance. Chrome steel and ceramic bearings have better wear resistance, while stainless steel bearings have poorer wear resistance.

3. Corrosion resistance: in some special environments, bearings need to have good corrosion resistance to avoid rust or corrosion. Stainless steel bearings have good corrosion resistance, while chrome steel and ceramic bearings have poor corrosion resistance.

4. Price: The price of ball bearings varies with different materials, generally speaking, ball bearings made of chrome steel are more affordable than stainless steel and ceramic bearings.

Third, the conclusion

Aggregate the above influencing factors, generally for the high load carrying capacity requirements, the operating environment is more severe large mechanical equipment, you can choose chrome steel material ball bearings; for low load, high speed occasions you can choose stainless steel ball bearings; for high speed, high temperature, vacuum and corrosive environments, you can choose ceramic material ball bearings. In the selection, but also consider the price and other aspects of the factors, in order to achieve optimal results.