Focus on the Bearing Industry for 20 Years!
I see that many friends who love cycling are discussing ceramic bearings. Here, let’s talk about some actual situations and some knowledge about ceramic bearings.
It is well understood that the so-called all-ceramic bearings are bearings made of ceramic materials, such as inner ring, outer ring and ball. For some ceramic bearings, we often see that the ball uses ceramics, while the inner ring and outer ring still use steel as materials.
Earlier ceramic bearings used composite alumina ceramics, which has the advantage of high hardness and hardness. In addition, composite silicon oxide is used, but the hardness of ceramic bearings using this material is slightly lower than that of alumina. The common feature of these materials is that they are brittle. At present, the main ceramic bearing materials use incompletely recrystallized zirconia with very hard hardness. Although the hardness of this material is slightly lower than that of alumina, its impact strength is very, very high.
At present, the impact resistance of common ceramic bearings is no longer a problem. Common ceramic bearings can meet this standard. The main problem now is that there is no suitable material for the retainer. The general situation is that the ceramic bearing is scrapped. Generally, the retainer is damaged. Now the material of the retainer is also various, including high-density nylon material and metal material. But no matter what kind of material it is now, it can’t grind ceramic materials.
Due to the limitation of the manufacturing process, its price cannot be the same as that of rigid bearing, so many places or industries do not use this kind of bearing, which also leads to its low output and increases the production cost in disguise, resulting in the high price of ceramic bearing.
Now the main production places of ceramic bearings are Sweden and Japan. China is also producing, with few models and low precision. However, there is more than enough on the bicycle. Even in foreign countries and other places, there are few models and the supply period is very long. In addition, there are many ceramic fine grinding balls produced in China, all of which are metric.
Of course, it is good for bicycles to use ceramic bearings. Ceramic bearings also have many advantages, such as high-temperature resistance, wear resistance, corrosion resistance, suitable for higher speed, very low coefficient of expansion and very low coefficient of thermal conductivity. If the price can be controlled, it will definitely have no problem replacing steel bearings on bicycles. Therefore, it may not be now, but the day when ceramic bearings may replace steel bearings in the future. Therefore, we should control the development and application of ceramic bearings in bicycles at the source, that is, in terms of price.