Bearing smooth and sealed analysis

Source: China Bearing Network Time: 2014-04-20

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One. The smooth bearing of the bearing is made of different materials when the grease is smooth. The smooth grease trademark is divided into lithium base grease, calcium base grease, composite grease, etc. according to the composition. It is divided into motor grease, low noise grease and high temperature resistance. Many varieties such as fat. Users should have the right choice. If the selected trademark is wrong; it has a great influence on the quality of the bearing. Therefore, the user should have basic knowledge in this aspect or refer to relevant information.
Users often have problems due to improper filling. The amount of grease filling has a great influence on the performance of the bearing; if the amount of grease is too small, the service life will be reduced due to poor smoothness or dry conflict; too much will form resistance when the bearing rotates. Large, high speed heat is severe; it will also lead to smooth grease leakage. Foreign famous bearing companies such as Sweden SKF company fills 30% to 50% of the internal clearance space of the bearing; Japan NsK company fills 23%-40%. If the user does not make special requirements; it can also be adjusted according to the user's needs. If the bearing is used in the high speed part; the amount of grease should not be too much; if used in the lower speed part; the amount of grease can be properly higher.
two. Sealed bearing seals of bearings are divided into dust cover type and seal ring type; seal type is divided into touch type and non-touch type (refer to whether the seal ring can be touched with the inner ring of the bearing). Use one z (one 2z respectively) Double-sided dust cover), an RS (a 2RS double-sided seal) and an RZ (a 2RZ) indicate that the dust cover is made of high-quality carbon steel; the seal is made of rubber. Used in high-speed environment; but the sealing effect is poor, bearing with sealing ring; especially the touch-type sealed bearing; the sealing effect is the best; but the speed can not be too high. Users can choose according to demand.

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