How to Prevent NTN Non-Standard Bearings From Being Eroded and Affect Their Service life
How to Prevent NTN Non-Standard Bearings From Being Eroded and Affect Their Service life
2022年3月29日
Effective Measures to Reduce the influence of Temperature Vibration on NTN Automobile Bearing life
Effective Measures to Reduce the influence of Temperature Vibration on NTN Automobile Bearing life
2022年3月29日

Necessary Treatment Measures for NTN Stainless Steel Bearing Failure Caused by Load

  • According to the different load directions, the stainless steel bearing mainly bears radial load, the bearing can bear both radial load and axial load, and the bearing mainly bears axial load. 
  • The bearing load is the radial load acting on the shaft, and FR and FN are the radial loads acting on the bearings at both ends of the shaft respectively. Under the action of radial load, the contact between the bearing rolling element and the inner and outer rings is affected by pulsating cyclic stress, resulting in fatigue pitting corrosion. 
  • After the bearing operates for a certain time, the bearing rolling element and the inner and outer ring raceway lose their original shape, the rotation accuracy of the shaft is reduced, the vibration and noise of the machine are increased, and finally the bearing failure is caused.Necessary Treatment Measures for NTN Stainless Steel Bearing Failure Caused by Load

Necessary Treatment Measures for NTN Stainless Steel Bearing Failure Caused by Load

  • Under the bearing load, FR and FN are the radial load and axial load acting on the shaft respectively, FR and FN are the radial load and axial load acting on the bearing at the left end of the shaft respectively, and fa2 are the radial load and axial load acting on the bearing at the right end of the shaft respectively. 
  • Under the action of radial load and axial load, NTN bearing not only produces fatigue pitting corrosion, but also under the action of axial load, one end of the bearing is compressed, and the stainless steel bearing at the other end is relaxed, resulting in wear on the contact surface of bearing elements at the compression end, so the failure of the bearing is accelerated. Necessary Treatment Measures for NTN Stainless Steel Bearing Failure Caused by Load
  • Under the action of axial load, the bearing elements are squeezed, so fatigue pitting and wear occur on the contact surface between the rolling element and the inner and outer rings during operation. 
  • Overload or excessive impact load will cause great damage to the rolling bearing, which will cause plastic deformation at the contact between the bearing rolling body and the inner and outer rings, and the permanent deformation of the bearing elements is the same, which will greatly shorten the service life of the bearing.Necessary Treatment Measures for NTN Stainless Steel Bearing Failure Caused by Load
Necessary Treatment Measures for NTN Stainless Steel Bearing Failure Caused by Load
  • When rotating the bearing, it should be very smooth without abnormal noise and impurities. Stainless steel bearings are allowed to make slight running noise during operation. If the noise is too loud or there is abnormal noise or impact sound, it indicates that the bearing is faulty. Bearing antirust treatment adopts antirust oil with slight fragrance, and the amount is small. Make the whole stainless steel bearing clean and fragrant. 
  • The bearing has fine chamfer and black edge at the junction of transverse and vertical surfaces. During the normal use of the bearing, the part where the bearing is installed is allowed to have a certain temperature. When touching the mechanism shell by hand, it is normal to feel that it is not hot. 
  • If the temperature of NTN bearing is too high during use, factors such as whether the quality of lubricating oil meets the requirements or deteriorates, and the viscosity of lubricating oil is too high can be considered; Or the installation mechanism is assembled too tightly and the bearing is assembled too tightly; Broken bearing cage or rolling element, etc.Necessary Treatment Measures for NTN Stainless Steel Bearing Failure Caused by Load
  • There are many reasons for the noise of NTN bearings. One is the wear of the mating surfaces of the inner and outer rings of the bearings. In addition, insufficient bearing lubrication, dry friction and bearing breakage will produce abnormal sound. It is important to keep stainless steel bearings and lubrication clean. 
  • Clean the surface of the machine before inspection, and then remove the parts around the bearing. The oil seal is a very fragile part, so it needs to be disassembled carefully. Do not apply excessive force, and then carefully check the oil seal and its surrounding parts. If there are bad symptoms, be sure to replace it. The bad oil seal will lead to bearing damage and strict equipment shutdown.Necessary Treatment Measures for NTN Stainless Steel Bearing Failure Caused by Load
Technical requirements for Timken non-standard bearing