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INA Bearing type is selected, the principal should consider the following five factors:
   

1) load direction, size and nature: radial ball bearings mainly take radial load as thrust bearing mainly subjected to axial load. INA bearings withstand the radial and axial load, the choice of angular contact ball bearings and tapered roller bearings. The axial load is small, you can also use deep groove ball bearings. Usually roll sub INA bearing load capacity than ball INA bearings, and the ability to withstand impact loads.
   

2) speed: working speed of the INA bearings should normally be lower than the limit speed n, the deep groove ball bearings, angular contact ball bearings and cylindrical roller bearings, high limit speed for high-speed operation of occasions, the thrust bearing speed limit than the low.
   

3) aligning performance: when the two INA bearing hole concentricity can not guarantee or shaft deflection, consideration should be given the choice of aligning ball bearings or spherical roller bearings.
   

4) stiffness requirements: usually roll sub INA Bearing stiffness is greater than the ball INA bearings, angular contact ball bearings, tapered roller bearing preload methods can further improve the bearing stiffness.
   

5) bearing spacing requirements: fixed bearing limit the axial displacement in both directions, you can make use of INA bearings can withstand the bidirectional axial load, one-way limit the choice of INA bearings can withstand a one-way axial load swimming in supporting not limited to bits, the choice of cylindrical roller bearings, the outer ring can be separated.