Which is better for rubber ball bearings or metal ball bearing?

The function of the bearing sealing cover is mainly to prevent the intrusion of foreign matter (solid foreign matter, liquid foreign matter) and prevent the loss of bearing lubricant.

There are two sealing forms of bearing sealing cover:

1. It is a non-contact sealing cover (the sealing cover and the inner ring are not in contact), including stamping steel plate sealing cover (iron closure) and non-contact rubber ball bearings.

Advantages: dustproof, high relative speed, relatively low noise effect of metal sealing cover, relatively low price.

Disadvantages: Cannot prevent the intrusion of liquid foreign objects.

2, it is the contact sealing cover rubber ball bearings(the sealing cover and the inner ring of the rubber ball bearings have single or multiple lip contact), including contact rubber sealing cover and labyrinth contact sealing cover.

Advantages: anti-dust, anti-liquid foreign matter, high mute effect.

Disadvantages: lower speed and higher price.

3, there is no difference between good and bad deep groove ball bearing sealing caps, only the difference between suitable and inappropriate. For example: in a clean environment, it is not necessary to use contact rubber seals, which will only increase the manufacturer's additional costs.

To sum up, there is no good or bad seal type. The main consideration is where the bearing is used, and the environmental factors of the bearing need to be considered. In fact, it is the sealing effect and friction coefficient.

The structure and material of the seal ring are different, and the friction coefficient is also different. If a bearing with a high friction coefficient is selected at a high speed, the bearing will soon be broken; the other is the difference in the dustproof effect. Therefore, when choosing the right bearing, many factors should be considered when choosing the rubber seal or seal of the bearing.

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