Factory Supply NSK B45-129E1 Deep Groove Ball Bearing
28/02/2024Factory Supply NSK B34-18AUR Deep Groove Ball Bearing
27/02/2024
The basic deep groove ball bearing consists of an outer ring, an inner ring, a set of steel balls and a set of retainers.
Deep groove ball bearing type has single row and double row two kinds, deep groove ball structure is divided into sealed and open two kinds of structure, open refers to the bearing does not have a sealed structure, sealed deep groove ball is divided into dust-proof seal and oil-proof seal.
Dust-proof seal cover material for steel plate stamping, only play a simple prevent dust into the bearing raceway.
Oil-proof type is contact type oil seal, which can effectively prevent grease overflow in bearing.
The sealing cover of deep groove ball bearing is mainly used to prevent the intrusion of external foreign bodies (solid foreign bodies, liquid foreign bodies) and prevent the loss of bearing lubricant. There are two sealing forms of bearing seal cover:
1. Non-contact sealing cover (sealing cover and inner ring are not in contact), including stamped steel seal cover (iron seal) and non-contact rubber seal cover.
Advantages: dust proof, relatively high speed, metal seal cover relatively low mute effect, relatively low price.
Disadvantages: There is no protection against liquid foreign bodies.
2.Contact sealing cover (sealing cover and bearing inner ring with a single lip or more lip contact), including contact rubber sealing cover and labyrinth type contact sealing cover.
Advantages: dust proof, liquid foreign body prevention, high mute effect.
Disadvantages: slightly lower speed, slightly higher price.
Therefore, there is no difference between good and bad deep groove ball bearing sealing cover, only the difference between suitable. For example: in a clean environment, it is unnecessary to use contact rubber sealing cover, which will only increase the additional cost of the manufacturer.
To sum up, the sealing type of deep groove ball bearing is not good or bad. The main consideration is where the bearing is used and the environmental factors of the bearing need to be considered. The structure of the sealing ring is different, the material is different, and the friction coefficient is different.
