What is the advantage of ceramic bearing

When it comes to bearing, stainless steel bearings is known to all, also can say some of its advantages, but everyone's understanding to the ceramic bearing is not so much. Although the ceramic bearing relative to the price of stainless steel bearing is higher, but the ceramic bearing has a stainless steel bearing cannot reach. Now the author will introduce what are the advantages of ceramic bearing for you. 1. Prevent damage of current ceramic bearing is conductive, and therefore suitable for the existence of current various applications such as dc and ac motors and generators. 2. Improve the speed performance of silicon nitride rolling body density than the density of the same size of the rolling element bearing steel low 60%. Lighter weight means smaller inertia, the bearing has good performance in fast during start and stop. 3. Long life ceramic bearing friction heat in the lower, especially under high speed, which helps to prolong the service life of bearing and to extend the lubricating again. 4. Wear resistance ability strong silicon nitride has higher hardness, roller that qualifies hybrid ceramic bearing for difficult conditions and environmental pollution. 5. High bearing stiffness ceramic bearing with high elastic modulus, provide higher bearing stiffness. 6. Reduce contamination risk even under the condition of inadequate lubrication, such as high speed and acceleration, or in the case of insufficient fluid dynamic membrane, silicon nitride and between the surface of the steel will also reduce contamination risk. For kappa & lt; predominate 1, the condition of the ceramic bearing generally used kappa = 1 predominate to calculate the service life of the bearing. 7. Reduce the risk of corrosion of micro vibration when subjected to vibration, ceramic bearing in silicon nitride and significantly less likely to occur between the steel surface corrosion of micro vibration ( In the raceway formation shallow sag) 。 8. Sensitivity to temperature gradient of low silicon nitride roller has a lower thermal expansion coefficient, which means that they on bearing inner temperature gradient is more stable, pre-load/clearance control more accurate. This is mainly because ceramic bearing materials adopted by the silicon nitride is a superhard material, itself has the lubricity, and wear resistance, as the atomic crystal; When high temperature oxidation resistance. And it also can resist cold and hot shock, in air heated to above 1000 ℃, a sharp cooling heating sharply again, also won't fracture. So the ceramic bearing has so many characteristics and be widely used.