Cage and selection of seal

1. Cage for engineering plastic cage, the performance of each manufacturer is slightly different, but broadly similar. This maintains a light weight, suitable for high speed applications. And the failure mode of this kind of cage is not suddenly burst, so more suitable for some does not allow all of a sudden stop. But for mining machinery, this kind of cage due to security concerns are not suitable for use, damage because it is not sudden, but as the temperature increased to 2 degree, completely broken, it could be dangerous for explosive occasions. This kind of cage temperature limitation at the same time, it is commonly - 40 ~ 120 ℃. For brass cage, little obstacles, but there is not suitable for ammonia environment. Small bearings generally don't use copper cage. For the steel cage, also there is no limit, but the big bearings do not use the steel cage. 2. Seal for dustproof, general iron lid is just a dust, no sealing function. There is no limit to the temperature, speed and open type bearing the same performance. Rubber seal sealing performance, but the speed of the sealed bearing is lower than open bearings. Ordinary rubber seals the highest working temperature should not exceed 120 ℃, high temperature fluorine rubber should not exceed 180 ℃.