Most of the bearing positions are designed with rolling bearings. Usually rolling bearings are manufactured with a certain "bearing clearance". Bearing clearance is defined as the total distance through which one bearing ring can be moved relative to the other in the radial direction (radial clearance) or in the axial direction (axial clearance). The radial clearance of a bearing is of considerable importance if reliable operation expected. Correctly installed rolling bearings increase the lifetime and cause less energy loss. In case of radial rolling bearings with a tapered bore, which are fastened on the shaft with an adapter sleeve, the radial clearance is reduced during the process of mounting.
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