roller bearing

In what environment are copper cage bearings and engineering plastic cage bearings recommended for use? And the recommended use of metal dust cover and plastic dust cover bearing environment?

General bearing cages are divided into brass, steel, and engineering plastics according to the different materials. All three have many applications in electric motors. For the cage of engineering plastics, the performance of each manufacturer is slightly different, but it is generally similar. The cage is lightweight and suitable for high speed applications. And the failure mode of this cage is not sudden breakage, so it is more suitable for some occasions that do not allow sudden shutdown. However, for mining machinery, this cage is not suitable for use due to safety considerations. At the same time, this cage has a temperature limit, generally between minus 40 degrees and 120 degrees. Otherwise, the cage material is prone to problems. The brass cage does not have these problems, but it cannot be applied to an ammonia environment. For steel cages, there are no restrictions. However, generally small bearings do not have copper cages, and large bearings do not have steel cages.

Regarding the dustproof effect, the general iron lid is only dustproof and has no sealing effect. But there is no great limit to temperature. At the same time, the speed performance is the same as that of open bearings. For rubber seals, the general temperature of ordinary rubber seals has a range, which cannot exceed 120 degrees, and high temperature fluorine rubber is 180 degrees. However, the sealing performance of the rubber cover is better, but the speed of the sealed bearing is lower than that of the open bearing.