INA bearing quality influence the limit speed of the three major factors

The main task of the INA bearing failure analysis, it is based on a lot of background material, analyze data and failure forms, find out the main factors of bearing failure, so that the improvement measures are put forward, prolonging bearing, avoid premature failure of the bearing of the sudden. Internal factors mainly refers to the structure design, manufacturing process and material quality and so on three major factors in determining the quality of bearing. First of all, reasonable structure design and equipped with advanced, just can have a longer INA bearing life. Bearing manufacturing generally go through forging, heat treatment, cutting, grinding and assembly, and multi-channel processing operations. The rationality of the processing technology, advanced, stability will also affect the service life of bearing. Which affects the quality of finished products bearing heat treatment and grinding process, tend to have a more direct relationship with bearing failure. In recent years the study of metamorphic layer of bearings working surface show that the grinding process and is close to the surface quality of the bearing. INA bearing materials of metallurgical quality were the main factors influencing the premature failure of the rolling bearing. As metallurgy technology, For example, the bearing steel vacuum degassing, etc. ) Progress, raw material quality is improved. Raw material quality factor in the bearing failure analysis share has declined obviously, but it is still one of the main influence factors of bearing failure. Select material adequacy is still bearing failure analysis factors must be considered. INA bearing limit rotational speed is of the bearing under certain working conditions, to can bear into the heat balance of the temperature when the speed limit. INA bearing limit speed and bearing contact Angle and tolerance grade, work status, lubrication mode, equipping type, type pre-load and material, a variety of factors. 1, 25 ° contact Angle of contact Angle INA imported bearing, its limit rotational speed is about 90% with 15 ° Angle contact bearing structure. 2, tolerance grade high speed machine tool spindle bearing level of tolerance for P4 commonly, if the bearing under the limit speed for accuracy, P4A and P2 precision bearing limit rotational speed is about 1. Level 1, P5 bearing is about 0. 9. 3, the working state of high speed machine tool spindle bearings for inner ring spinning, outer ring fixed commonly, if bearing limit speed for at this time, when the outer ring spinning, inner ring fixed, bearing limit rotational speed is about 0. 6. 4, the different lubrication way lubrication way, the INA bearing limit speed also have great influence, table 2 for the limit speed coefficient of bearing under different lubricating conditions.