1. High temperature resistance of common bearing steel: 150-200 ℃ (the structure is full rolling element)

2. High-temperature alloy steel: 300-500 ℃ (its structure includes retainer and full rolling elements)

3. Silicon nitride ceramic roller: 800-1200 ℃ (its structure is full roller)

If your environment does not exceed 500 ° C, use a second material. High-temperature bearing shall be selected according to the actual application environment. For example, the high-temperature bearing with retainer, sealing ring and high-temperature grease must be used when the environment is severe and the rotating speed is high.