there should be some axial clearance, so what is the effect of the gap too large or too small on the working conditions of the shafting?
According to your use requirements, the installation of angular contact bearings or tapered roller bearings, there may be some axial clearance, or there is no axial clearance! If the requirement of rigidity is large, a certain negative clearance can be pre tightened, and a small amount of preload will not cause premature fatigue failure of the bearing, but it can improve the rigidity of the bearing! If the rigidity requirement is not strict, it is recommended to leave the axial clearance of 0.01-0.03. 0.20 upstairs said it is whole!
The axial clearance is too small: machinery during operation due to friction between the various parts of the heat, bearing operation will be fever (bearing parts expansion), these heat conduction to the shaft, the shaft expansion will stretch, and then make the bearing axial clearance decreases, if the axial clearance of bearing is too small. The shaft can bend, rotation accuracy is reduced, and the load bearing is greatly increased. The change of the axial clearance of the bearing depends on the size of the machine parts, the material and the temperature gradient during operation.Angular contact ball bearings or tapered roller bearings Axial Clearance: 0.05~0.20mm (according to speed, load, etc.) to determine.
In rolling bearings, clearance is called clearance, divided into axial clearance and radial clearance. We know that the bearing is used to support the shaft, and its manufacturing accuracy and installation accuracy of the shaft rotation accuracy plays a major role. When the axial clearance of angular contact ball bearings or tapered roller bearings increases or decreases, the radial clearance increases or decreases.The axial clearance is too large for angular contact ball bearing or tapered roller bearing axial clearance increases, mean radial clearance increases, the shaft in rotation, when subjected to external load, the beating will produce radial and axial, and axial stiffness reduction.
