Angular contact ball bearing preloading method and determination method.

Because there is clearance in angular contact ball bearings, the inner and outer rings will move relative to each other under load, which will reduce the rigidity of the bearing. In order to reduce vibration, preloading is often used when installing angular contact ball bearings to eliminate the original load. clearance.

Method of preloading angular contact ball bearings

The preloading methods of angular contact ball bearings include radial preloading and axial preloading.

1. Radial preload

Radial preloading is usually achieved by expanding the inner ring of the bearing, or by moving the axial position of the inner tapered hole of the bearing to achieve preloading.

2. Axial preload

Commonly used axial preloading methods include grinding washer thickness, adjusting inner and outer spacer thickness, spring preloading, narrowing inner and outer rings, screw cover adjustment, and thrust ring adjustment.

(1) Method of adjusting the thickness of inner and outer spacers

Preloading is achieved by adjusting the thickness of the inner and outer spacers. Due to the thickness of the spacers, a preload force is generated between the inner and outer rings of the angular contact ball bearing.

(2) Grinding washer thickness method

The inner and outer rings of the bearing are relatively moved to achieve preloading. When the thickness of washer 1 is smaller, the preloading force of the angular contact ball bearing is greater; when the thickness of washer 2 is smaller, the preloading force is smaller.

(3) Narrowing the inner and outer rings

Preloading is achieved by grinding the inner or outer rings of bearings used in pairs. To narrow the inner ring, the two inner rings are pressed relatively tightly during assembly, and the bearing can produce preload; to grind the outer ring to narrow the assembly, When the two outer rings are relatively compressed, the bearing can be preloaded.

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