Rolling bearing should be how to choose to cooperate with

Bearing is a kind of important modern machinery and equipment parts. Its main function is to support the mechanical rotator, reduce the coefficient of friction in the process of the movement, and guarantee its rotation accuracy. Rolling bearing manufacturer of rolling bearing inside diameter size and outside diameter size is made according to the standard tolerance, bearing inner ring and the shaft, the outer ring and a hole with tightness can only by controlling the tolerance of the shaft neck and tolerance of hole. Bearing inner ring with the shaft with the use of hole system, bearing outer ring with a hole using the basic shaft system. Right choice to cooperate, we must know the actual load condition of bearing, operating temperature and other requirements, but in fact it is very difficult. As a result, most of the time, is according to the use of lapping choice to cooperate. Transition fit means may have a gap or interference fit. At this point, the hole of tolerance zone and the axis of the tolerance zone overlapping each other. Transition fit is mainly used for centering between hole and shaft coupling. Shaft hole bigger limit size of smaller size limit income difference is bigger gap Xmax, hole, shaft with more loose state; Smaller limit of size of hole of shaft larger limit of size income difference is more greater than surplus Ymax, hole, shaft fit tighter. According to the load acting on the bearing relative to the rotation of the ring, there are three kinds of bearing ring under the load: local load and cyclic load, the load swing. Cyclic loading (usually Rotating load) Use tight fit, oscillating load; Local load in addition to have special use requirements, should not be commonly use tight fit. When the bearing ring under the dynamic load and heavy load, both inner and outer ring should use interference fit, but sometimes the outer ring can be a little loose, should be able to swim in the hole for the axial bearing shell; When the bearing ring oscillation under load and load is lighter, can use a little loose than tight fit. Cooperate with the roughness of the surface, form and position tolerances, directly affect the use of the product performance, such as wear resistance, corrosion resistance and cooperate with the nature, and so on. Therefore, the reasonable regulation shaft, shell hole shape and position tolerances and request with the roughness of the surface, for stable properties, increase a win with the coupling strength is very important.