How many of miniature ball bearings paired parts for testing

Since the accuracy of precision miniature ball miniature ball bearings itself within 1μm, thus requiring its matching parts (shafts, housings, end caps, ring, etc.) have a high dimensional accuracy and shape accuracy, especially to control the accuracy of the mating surfaces of the bearing within the same level, which is crucial, but also the most easily overlooked.
You must also pay attention to precision miniature ball bearings to match parts if not meet the above requirements, often makes precision bearings error occurs several times larger than the original bearings after installation, even 10 times higher than the error, completely ceases precision bearings, because Matching mechanical error is often not simply superimposed on the high precision bearings error, but in a different multiples after amplification additions.
Miniature ball bearing dimensions determined in accordance with the requirements are not the same. Parameters are not the same, bearing in determining the size parameters, we start from multiple angles. Here we talk to everyone from all angles:
In many cases, miniature ball bearings bore size has been specifically defined by the structure of a machine or device. Whether working life, static load safety factor and whether the economy will meet the requirements, bearing the rest before the final selection of the size and structure, will be subject to the size of calculus. The calculation includes the actual load with its load miniature linear bearings

 capacity for comparison.
Miniature ball bearing static load refers to the rear bearing load is stationary (no relative movement between the inner and outer rings) or rotational speed is very low. In this case, the calculation and the rolling body raceways and an excess of factor of safety of plastic deformation. Most affected by dynamic load bearing inner and outer rings relative motion, check the size of calculus fatigue damage raceways and rolling elements of early safety factor.
In fact, miniature ball bearings and model parameters are also functional relationship with the intended use. We must pay attention to these issues.