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NTN bearing application requirements and common problems

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NTN bearing sealing, correct use and faults and adjustment NTN bearing sealing equipment can be placed in the bearing support or directly on the bearing. According to the sealing planning can be divided into two types: touch seal and non-touch seal. There are dozens of bearings on the car that are NTN bearings; large and small sizes contain all the common bearing types; NTN bearings are also more common because of the impact and damage. Because NTN bearings are generally installed inside the organization; so it is not convenient to visually view It can only be judged according to the appearance of the disease; then it can be opened and viewed. The correct use of NTN bearing is a reliable guarantee to reduce the bearing fault and extend the life of the bearing; its content contains the correct device and reasonable smoothness. The following professors are respectively We analyze the application requirements of NTN bearings and common faults and injuries.
First, the correct use of NTN bearings. The bearing should be cleaned before the disassembly and assembly of the bearing device; the special bearing should be used to press the auxiliary bearing straight and evenly; do not hit with a hammer; uniquely stop directly on the bearing.
2. Smoothing NTN bearings for bearings commonly used smoothing agents are smooth oil and smooth grease. When the circumferential speed of the shaft is less than 4-5m / s; or the car can not use smooth oil smooth parts; are smooth grease smooth.
Second, the NTN bearing common fault NTN bearing fault appearance generally shows two; first, the bearing device part temperature is too high; second, there is noise in the bearing work.
1. If the bearing temperature is too high during the organization work; the part of the bearing of the device promises a certain temperature; when the tissue is touched by hand; it should be normal without feeling the trick; otherwise, the bearing temperature is too high.
2. Bearing noise NTN bearing promises a slight working noise during work; if the sound is too loud or there is abnormal noise or impact sound, it indicates that the bearing is faulty.
Third, NTN bearing damage NTN bearing dismantling view; can be based on the bearing damage condition to determine the bearing fault and damage reasons.
1. The outer surface of the raceway metal-off bearing NTN body and the inner and outer ring raceways all receive the effect of periodic pulsating load; then the cyclic stress changes occur.
2. Bearing burn burned bearings have tempering color on the raceway and NTN body. The cause of burn is generally lack of smoothness, the quality of smooth oil does not meet the demand or transformation; and the bearing device is too tight.
3. The groove of the plastic deformation bearing and the roller touch surface show uneven pits; clarify the plastic deformation of the bearing.
4. The crack of the bearing race crack bearing seat can be caused by the bearing cooperation too tight; the bearing foreign or inner ring loose; the bearing housing deformation; the bearing bearing surface processing is not good.
5. The reason for the fragmentation of the cage is the lack of smoothness; the NTN body is broken; the seat is inclined.
6. The reason why the metal of the cage adheres to the NTN body is that the NTN body is stuck in the cage or is lacking in smoothness.
7. Severe wear of the raceway can be caused by foreign objects falling into the race; lack of smooth oil or smooth oil trademark is not the same as other cylindrical bore radial bearings; internal clearance of single row angular touch ball bearings and tapered roller bearings; Only when one bearing is aligned with another bearing for adjustment.
Typically these bearings are back-to-back or face-to-face pairs; one bearing ring is axially displaced; until the selected clearance or preload is selected. The clearance or preload is selected; depending on the function and working conditions of the bearing plan.

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