bearing and sleeve

1.small volume, light weight: Because the miniature bearing size is small, so its weight is light; At the same time,because of the advantages of simple structure,low manufacturing accuracy and easy processing,the cost of miniature bearings is low. In addition, it can be fixed directly by bolts or welding without special fixtures or fastening tools. These characteristics make micro bearings more suitable for use as key parts in precision instruments. 2. High reliability: Because of the small size and simple structure, the material requirements are usually lower; In addition, because the manufacturing process is easy to master and other reasons, its quality stability and reliability is higher (of course, compared with the ordinary rolling body there is still a certain gap). Therefore, it is a better choice for some precision mechanical parts such as crankshaft,camshaft and connecting rod of automobile engine and machine tool spindle. 3. Long service life: Due to the above reasons, the quality stability of miniature bearings is better and the service life is longer (although there is still a big gap compared with the traditional sliding fit), and with the continuous progress of technology,it has been able to achieve no lubrication or less lubrication operation (but it still needs regular maintenance).