Precision bearings in accordance with the ISO classification standard

precision bearing in accordance with the classification standards ISO divided into:. P0, P6, P5, P4, P2 grade increased sequentially, which is normal precision P0, other grades are precision level. Of course, different grading standards, different types of bearings, their grading methods are different, but the meaning is the one to. super-precision bearing performance requirements on a rotating body having high runout accuracy, high-speed rotation and low friction and friction change.
Since precision bearings themselves accuracy 1μm or less, thus requiring its matching parts (shaft, bearing, cap, ring, etc.) have a high dimensional accuracy and shape accuracy, especially to control the accuracy of the mating surfaces and bearing the same horizontal, which is crucial, but also the most easily overlooked.