Fluorosilicone oil exhibits excellent overall lubrication performance in high-temperature motor bearings.  With its wide temperature range, outstanding chemical stability, low friction coefficient, and high load-carrying capacity, it is an ideal choice for lubricating high-temperature motor bearings, especially for long-term stable operation in environments ranging from -50℃ to 200℃ and even higher temperatures.

I. Core Lubrication Advantages
Ultra-Wide Temperature Adaptability
The typical operating temperature range of fluorosilicone oil is -50℃ to 200℃, and some high-end products can reach -60℃ to 250℃, far exceeding the temperature limit of ordinary silicone grease (-50℃ to 150℃).
In high-temperature motor bearing applications, even when continuously operating above 150℃, fluorosilicone oil maintains stable viscosity characteristics and does not easily volatilize or coke, ensuring long-term reliable operation of the bearings.
It remains soft and does not harden at low temperatures, avoiding the embrittlement problems of traditional greases in low-temperature environments, ensuring smooth motor startup.
Excellent Chemical Stability
The trifluoropropyl groups in the molecular structure of fluorosilicone oil create an "electronic shielding effect," giving it extremely strong chemical corrosion resistance, effectively resisting corrosive media such as strong acids, strong bases, and organic solvents.
In high-temperature motor bearing applications, even when in contact with fuel, solvents, or corrosive gases, fluorosilicone oil maintains stable performance, avoiding the problem of ordinary silicone grease swelling and failing when exposed to polar solvents.
Low surface tension (20-25 mN/m) makes it less susceptible to oil contamination, maintaining bearing cleanliness, and is particularly suitable for motor bearings in semiconductor cleanroom equipment.
Excellent Tribological Performance
Fluorosilicone oil can significantly reduce the friction coefficient by 30%-50%, forming an effective boundary lubrication film on steel-steel contact surfaces.
Its high load-carrying capacity makes it suitable for high-load motor bearings, maintaining stable lubrication performance even under high-speed conditions with DN values greater than 75,000.
Low volatility ensures that it does not evaporate during long-term use in high-temperature environments; the volatile content remains below 5% after heating at 200℃ for 4 hours, extending bearing life. High Reliability and Long Service Life
Fluorosilicone oil possesses excellent oxidation resistance and thermal stability, with significantly better thermal oxidative stability than traditional ester-based oils, which can be further improved by adding suitable antioxidants.
It exhibits good compatibility with metal materials and is non-corrosive to bearing steel.  It is also compatible with most rubber and plastic seals, and will not cause swelling or embrittlement of the seals.
It has an extremely long service life, enabling "lifetime lubrication" under appropriate conditions, reducing maintenance frequency and downtime.

II. Advantages Compared to Traditional Lubricants
Table
Characteristic                       | Fluorosilicone Oil | Ordinary Silicone Grease | Lithium-based Grease
Temperature Range              | -50℃ to 200℃ | -50℃ to 150℃ | -20℃ to 120℃
Chemical Resistance             | Excellent (resistant to acids, bases, and solvents) | Fair (easily fails in the presence of solvents) | Poor (not resistant to strong chemical media)
Coefficient of Friction            | 30%-50% lower | Medium | Medium to High
High-Temperature Stability     | Excellent (does not easily volatilize or coke) | Fair (slight volatilization) | Poor (easily oxidizes)
Low-Temperature Performance | Good (does not harden at -50℃) | Fair (thickens at -40℃) | Poor (hardens at -20℃)
Service Life                          | Long (up to 2 years) | Medium | Medium
Applicable Scenarios             | High temperature, high corrosion, high vacuum | Conventional environments | Conventional environments