NEWS CENTER

Fits of angular contact ball bearings

2022-12-28

When rolling bearings cooperate with shafts and bearing housings, they must be positioned and fixed according to different requirements in three directions: radial/axial and axial (tangential). The axial positioning of the bearing is usually realized by nuts, shaft shoulders, end covers, spacers, circlips, and end faces of adjacent parts.

For high-speed precision spindle bearings, in order to ensure their good dimensional accuracy and rotation accuracy, excessive interference fit should be avoided to prevent ring deformation due to large interference and loss of bearing accuracy. On the other hand, for high-speed bearings with a dmn value greater than 1.0X10 6mm.r/min, if the fit between the inner ring and the shaft is not appropriate, when the bearing rotates at high speed, the inner ring will expand outward due to the action of centrifugal force, causing increased clearance between inner ring and the shaft which may also lead to creep, friction, wear, etc. Therefore, for matching condition of high-speed precision spindle bearings,

special attention must be paid to.