High temperature bearings are a type of bearing that can withstand high temperatures and maintain excellent mechanical performance in high temperature environments. High temperature bearings can be divided into two types in terms of structural technology: 1. Ordinary structure high-temperature bearings 2. Special structure high-temperature bearings can be classified into: 1. ET grade 200 ℃ 2. D (S) T grade 300 ℃ 3. I (X) T grade 400 ℃ 4. W (F) T grade 500 ℃ 5. CT grade 600 ℃ 6. QT grade 700 ℃ 7. BT grade 800 ℃ 8. C grade 800 ℃~1400 ℃.