Buy High Temperature Bearings Online in Australia
High Temperature Bearings — Rated for Extreme Heat Applications
High temperature bearings are engineered to keep running in environments where standard bearings fail. The breakdown point for a conventional bearing is largely determined by its grease and seals — standard greases typically begin to degrade above 120°C, causing premature bearing failure in ovens, kilns, furnaces, dryers, and steel mill equipment. High temperature bearings solve this by combining heat-stable steel alloys, high-temperature grease compounds rated to 250°C or higher, and metal-shielded or open configurations that eliminate rubber seals — which are the first component to fail under sustained heat.
Types and Ratings
The AIMS high temperature bearing range covers deep groove ball bearings and insert bearings (Y-bearings) rated for continuous operation from 250°C to 270°C. Metal-shielded variants (suffix /C3 or /C4 internal clearance) are the standard choice for most high-heat applications, as the larger internal clearance compensates for thermal expansion of the inner and outer rings. Open bearings (no shield or seal) packed with specialised high-temperature grease are used in the most extreme environments where re-lubrication access exists. Standard rubber-sealed bearings should never be substituted — the seal material will fail rapidly above 120°C, contaminating the lubricant and accelerating wear.
Lubrication Considerations
Even a high temperature bearing requires the right grease. Standard lithium-complex greases are suitable to approximately 150°C. For sustained service above that, specify a grease with a silicone, PTFE, or perfluoropolyether (PFPE) base — these maintain viscosity and do not carbonise at elevated temperatures. Re-lubrication intervals should be shortened significantly in high-heat applications, as grease oxidation accelerates with temperature. The AIMS team can advise on compatible lubricants for your application.
Applications
High temperature bearings are used in industrial ovens and conveyor dryers, ceramic and brick kilns, glass annealing lehr conveyors, powder coating and paint curing ovens, bakery and food processing tunnel ovens, steel mill rolls and continuous casting equipment, and hot material handling conveyors in mining and quarrying. Any rotating application operating above 150°C sustained should be assessed for high temperature bearing specification.
AIMS Industrial stocks high temperature ball bearings and insert bearings for Australian industry. Contact our Sydney team to confirm the right bearing series, internal clearance, and grease specification for your application. Fast Australia-wide delivery.