How to judge the fault damage of the NTN angular contact ball bearings

1,070 Published by admin1 Nov 14,2018

From peeling, indentation, rust, crack and wear will be reflected in the bearing vibration measuring, NTN bearing vibration damage of bearing is very sensitive, so the angular contact ball bearing through the use of special bearing vibration tester (frequency analyzer, etc.) can measure the size of the vibration, through frequency points cannot deduce the abnormal situation. As the measured values are different due to the operating conditions of the bearing or the mounting position of the sensor, it is necessary to analyze and compare the measured values of each machine before determining the judgment criteria.

original NTN angular contact ball bearings

Because the NTN angular contact ball bearings will produce abnormal sound and irregular sound even if it has slight dissection and other damage, it can be distinguished by the sound detector, and the sound detector can be used to check the rolling sound size and sound quality of the angular contact ball bearing in operation, playing a preventive role in advance.

It is more suitable if the temperature of bearing outer ring can be measured directly by using oil hole. Generally, the temperature of NTN bearing can be inferred from the temperature of the bearing outside. If the lubrication and installation department is appropriate, the bearing temperature will rise suddenly and there will be abnormal high temperature. At this time, the operation must be stopped and necessary precautions should be taken. Generally, the temperature of the bearing rises slowly as the operation begins and reaches a steady state after 1-2 hours.

NTN angular contact ball bearings in stock The normal temperature of the angular contact ball bearing varies with the machine's heat capacity, heat dissipation, speed and load. When necessary, use the heat sensor to monitor the working temperature of the bearing at any time, and realize automatic alarm door or stop to prevent the occurrence of burning shaft accidents when the temperature exceeds the specified value.

The assembly of NTN angular contact ball bearings is the basic operation of fitter assembly and repair work, and the adjustment and pretightening of clearance is the important part of rolling bearing assembly work. It is the guarantee of the working quality of bearing assembly to accurately grasp the process concept of clearance adjustment and preload and correctly apply this process method in the assembly work.

NTN angular contact ball bearings Japan

The clearance of NTN angular contact ball bearings refers to the maximum amount of movement of another ring along the radial or axial direction when one ring is fixed. Therefore, clearance can be divided into radial clearance and axial clearance. When assembling angular contact ball bearings, the clearance cannot be too large or too small. If the clearance is too large, the number of rolling bodies bearing the load at the same time will decrease, and the load of a single rolling body will increase, thus reducing the rotation accuracy of the bearing and reducing the service life. Too small clearance will increase the friction, increase the heat generated, aggravate the wear, and also reduce the service life of the bearing. Therefore, bearing assembly should be strictly controlled and adjusted clearance.Preload means that when the bearing is assembled, an axial force is given to the inner ring or outer ring to eliminate the bearing clearance and cause initial deformation of the rolling body at contact with the inner and outer rings. Pretightening can improve the stiffness and rotation precision of the bearing under the working state.

NTN angular contact ball bearings

Bearing with large load and high requirement of rotation accuracy is mostly operated under the condition of no clearance or even a little over filling. In this case, it is necessary to pretighten the bearing during assembly. Clearance adjustment and preload are usually achieved by making appropriate axial relative displacement of the inner and outer rings. It is not difficult to see from the above technical concept that by adjusting the clearance of the diagonal contact ball bearing, bearing capacity and rotation accuracy of the bearing can be improved and the service life of the bearing can be improved. But at the same time, the friction of NTN bearing increases and the heat output increases. Therefore, good lubrication and heat dissipation must be ensured when adjusting the clearance or pretension. Improper adjustment or poor lubrication will in turn lead to increased bearing wear and reduced life

If you are finding NTN angular contact ball bearings or other bearings, please contact me any time!

Contact: Ellen
Skype: +8618668909563
MP/Whatsapp: +8618668909563

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