October 13,2026
Conditions where conventional lubrication is nearly impossible are mainly concentrated in extreme temperature, vacuum, and contaminated/corrosive environments, where lubricating oils or greases fail, evaporate, or are washed away.
Ultra-High-Temperature Environments
Standard grease has a maximum operating temperature of approximately 120°C, and conventional high-temperature grease can reach 180°C. Beyond this limit, grease degrades rapidly and evaporates, causing bearing failure. Bearings in aerospace actuation systems, high-temperature furnaces, and kilns often cannot use conventional grease lubrication.
Cryogenic/Low-Temperature Environments
In cryogenic pump applications at approximately -190°C, lubricating oils solidify or lose fluidity, making it impossible to form an effective lubricating film. In cryogenic and ultra-high vacuum environments, liquid lubricants can no longer be used, and solid lubrication must be relied upon.
Ultra-High Vacuum Environments
In ultra-high vacuum environments (pressure below 10⁻⁷ mbar) in semiconductor, electronics, and LCD manufacturing, standard grease evaporates and releases gas (outgassing), which both degrades the vacuum and causes lubrication failure. Wafer transfer equipment operates under such conditions, and bearings must use special solutions.
Contaminated and Corrosive Media Environments
Under conditions of heavy dust, acidic corrosive gases, water washdown, or acid/alkali immersion, grease is easily washed away or contaminated and degraded, making conventional lubrication methods difficult to maintain. Metallurgical continuous casters, mining machinery, and marine applications fall into this category.
Oil-Free Self-Lubricating Bearings (Composite Material Lubrication)
These use a metal matrix with embedded solid lubricants such as graphite or PTFE. During friction, the solid lubricant transfers to the friction surface to form a lubricating film. Suitable for heavy loads, low speeds, and reciprocating/oscillating applications where an oil film is difficult to form.
PTFE-Lined Self-Lubricating Bearings
PTFE liners are self-lubricating and require no grease. Suitable for oil-averse locations and applications where lubrication is difficult or impossible. Can be used for low-speed oscillating conditions.
Gas-Lubricated Bearings
These use air, nitrogen, or other gases as the lubricating medium, forming a gas film between friction pairs to achieve lubrication. Suitable for high-speed, low-friction, and oil-free contamination applications.
Ceramic Ball Hybrid/Full Ceramic Bearings
Silicon nitride ceramic balls combined with PTFE-based cages. During operation, cage material transfers to the raceways to form a solid lubricating film. In patented technology, the solid lubricating film thickness is only a few millionths of an inch, enabling 10–20 years of maintenance-free operation.
Oil-Impregnated Cage Bearings
Cages are made from self-lubricating composite materials with solid lubricants dispersed in metal. Suitable for special environments such as high temperature, steam, and heavy-load, low-speed conditions.
Fluoroplastic/Carbon Graphite Bearings
Using PTFE and polyisobutylene composite materials, or carbon graphite impregnated with silver, these are self-lubricating and can operate within the range of -269°C to 250°C. Carbon graphite rolling elements provide lubrication from the initial run-in period.
Selection Considerations
When conventional lubrication is unavailable, the core approach shifts to solid lubrication or self-lubricating materials. When selecting, it is necessary to confirm the temperature range (PTFE composites can cover an extremely wide temperature range), vacuum compatibility (avoid outgassing), and media compatibility (resistance to acids, alkalis, and water washdown). For combined vacuum + high-temperature conditions, pre-baking treatment is required to eliminate outgassing risks.
If your equipment requires extremely low lubrication bearings but standard bearings cannot meet the requirements, please feel free to contact us. We can provide customized solutions tailored to your specific needs.
