Ina bearings burn injury state is: INA Bearing Raceway, rolling body and cage in the rotation of rapid heating, until discoloration, softening, cladding and damage.
The main reason for the burn of ina bearings is that the lubrication of ina bearings is bad, maybe the use of irregular lubricants, or too many lubricants and too few are incorrect. About the INA Bearing Lubrication related information, please refer to the two articles, "the misunderstanding of lubricating oil in the process of repairing FAG bearing" and "the introduction of lubricating technology in INA Bearing".
The second may be excessive load (overpressure). The speed is too large. The gap is too small. Invaded by water or other foreign bodies. If the above two cases are not that the shaft, the bearing box of the poor precision, the shaft deflection is large. To see here, I think you all want to know the solution. First, we need to study lubricants and lubrication methods, choose lubricant for bearing and its dosage, and correct the bearing selection. Research should cooperate, bearing clearance and preloading, and improve the sealing device. Check the accuracy of the shaft and the bearing box