Deep Groove Ball Bearing

Since the accuracy of precision miniature ball bearings is within 1 μm, their matching parts (shafts, bearing seats, end caps, retaining rings, etc.) are required to have high dimensional accuracy and shape accuracy. In particular, the accuracy of the mating surface must be controlled to be within the range of the bearing. Within the same level, this point is crucial and most easily overlooked.

    It must also be noted that if the matching parts of precision miniature ball bearings do not meet the above requirements, the precision bearings will often have errors that are several times or even 10 times greater than the original bearings after installation, which does not qualify them as precision bearings at all. The reason is The error of matching parts is often not simply superimposed on the error of the bearing, but is magnified and added at different times.

The determination of the size parameters of miniature ball bearings varies according to requirements. The parameters are also different. When determining the dimensional parameters of the bearing, we have to start from multiple angles. Below we will tell you about it from various angles:

In many cases, the bore size of miniature ball bearings has been specifically defined by the structure of the machine or device. Regardless of whether the working life, static load safety factor and economy meet the requirements, size calculations must be carried out before the final selection of the remaining dimensions and structural forms of the bearing. The calculation involves comparing the actual load on the bearing to its load capacity.

The static load of miniature ball bearings means that the bearing is stationary after loading (no relative movement between the inner and outer rings) or the rotation speed is very low. In this case, calculate the safety factor for excessive plastic deformation of the raceway and rolling elements. Most bearings are subject to dynamic loads, and the inner and outer rings move relative to each other. Dimensional calculations check the safety factor of early fatigue damage of raceways and rolling elements.

In fact, the parameters of miniature ball bearings are also related to the model, function and use. Everyone must pay attention to these issues.