October 13,2026
High-temperature bearings are widely used in high-temperature industrial machinery such as metallurgy, kilns, glass, blast furnaces, and painting equipment. Specific high temperature environment scenarios include:
Industrial Furnaces and Kilns: Such as kiln cars, roller hearth furnaces, and baking equipment. SKF high-temperature bearings can operate at temperatures up to 350°C.
Semiconductor and Thin-Film Manufacturing: Ion implanters, sputtering equipment, and high-temperature thin-film manufacturing equipment. NSK YS-type bearings can be used in 350°C vacuum environments, and SJ-type can reach 400°C.
Aerospace: Hot air valve bearings can operate at temperatures up to 538°C, with next-generation valves expected to reach 704°C.
Nuclear Reactors and X-Ray Equipment: Precision rolling bearings are used in high-temperature nuclear reactors and rotating X-ray anodes, with temperatures reaching above 180°C.
Kiln Handling Equipment and Office Equipment: Such as high-temperature fusing components in office equipment.
High-Temperature Grease-Filled Bearings (KPM Grease)
Filled with fluorine-based grease, usable in 230°C atmospheric environments. Suitable for handling equipment inside kilns and high-temperature components in office equipment.
YS-Type Spacer Bearings
Alloy-type self-lubricating material spacers are placed between rolling elements. Suitable for high vacuum + 350°C. Typical applications include ion implantation equipment and sputtering equipment.
SJ-Type Solid Lubricated Bearings
Featuring a "bean pod" structure with solid lubricant spacers placed between two rolling elements, capable of withstanding 400°C in both vacuum and atmosphere. Used in high-temperature thin-film manufacturing equipment.
High-Temperature Stainless Steel Bearings (AISI 440C)
Made of AISI 440C stainless steel and filled with high-temperature fluorine-based grease, operating temperatures up to 250°C. Suitable for furnace surroundings, ovens, drying equipment, and vacuum apparatus.
Hybrid Ceramic Bearings
Stainless steel rings combined with silicon nitride (Si₃N₄) ceramic balls. Ceramic balls have a low thermal expansion coefficient (3.2×10⁻⁶/°C, far lower than bearing steel's 12.5×10⁻⁶/°C), resulting in minimal internal clearance changes at high temperatures and excellent rigidity. Suitable for high-speed, high-temperature conditions such as aerospace.
Full Ceramic Bearings
Inner and outer rings and balls are all ceramic materials, capable of withstanding temperatures up to 1,200°C. They feature self-lubricating properties and can overcome lubrication challenges in ultra-high vacuum.
Special Alloy Bearings (BG42®, etc.)
CEROBEAR hybrid bearings use high-temperature metal rings such as BG42® combined with Si₃N₄ ceramic balls, used in extreme high-temperature scenarios such as hot air valves at 538°C to 704°C.
Selection Considerations
When selecting high-temperature bearings, attention must be paid to the lubrication method (grease lubrication is suitable below 230°C, solid lubrication for 350–400°C, and ceramic self-lubrication can cover even higher temperatures) and material thermal expansion matching (ceramic balls paired with steel rings can reduce clearance changes). Additionally, cage materials (such as PEEK, PA46 with graphite) and seals (fluororubber) must also withstand the corresponding temperatures.
If your equipment requires specific bearings for high temperature environment but standard bearings cannot meet the requirements, please feel free to contact us. We can provide customized solutions tailored to your specific needs.
