1、 Installation of ceramic bearings

When installing bearings, it is necessary to apply equal pressure on the circumference of the end face of the ring. To install the ring, it is strictly prohibited to directly hit the end face of the ring with a hammer or other heavy objects to avoid damaging the bearing. In addition, if one side of the ring (such as the outer circle) is pressed in, it often causes indentations or scratches on the rolling surface, and should not be used, especially when installing non separable bearings on the bearing box at the same time. As shown in the figure, use shims to evenly press in the inner and outer rings.

2、 Matching of ceramic bearings

（1） Interference fit

Fix the inner and outer rings of the rolling bearing onto the shaft or bearing housing. When it is subjected to a load, ensure that the mating surface between the ring and the bearing box does not experience relative radial and rotational movements. This relative movement will cause wear, friction corrosion, or friction cracks on the mating surface, resulting in damage to the bearings, shafts, and axle boxes. This can lead to the mixing of wear powder into the interior of the bearings, resulting in poor operation, abnormal heating, or vibration.

The best way to fix the bearing is to fit it with interference on the mating surface between the ring and the shaft or bearing box. This fit ensures that the load on the thin-walled ring is evenly distributed on the circumference, without affecting the bearing's load capacity. However, when using static fit, except for the inconvenience of installing and removing bearings, when using separate bearings on the free side, it cannot be turned or moved, so it cannot be used in all situations. Please contact our company for specific issues during installation.

（2） Selection of cooperation

The selection of cooperation generally follows the following principles.

According to the direction and nature of the load acting on the bearing, as well as the direction in which the inner and outer rings rotate, the load borne by each ring can be divided into rotational load, static load, and non directional load. The ring that bears rotating and non directional loads should be fitted with a static fit (interference fit), and the ring that bears static loads should be fitted with a filter fit or a dynamic fit (clearance fit).

When the bearing is overloaded or subjected to vibration and impact loads, its interference must increase. Hollow shafts, thin-walled bearing boxes, or light alloys should be used. When making plastic bearing boxes, it is also necessary to increase the interference amount.

When maintaining high rotational accuracy, high-precision bearings must be used, and the dimensional accuracy of the shaft and bearing housing should be improved to avoid excessive interference. If the interference is too large, it may affect the geometric accuracy of the shaft or bearing housing and affect the geometric shape of the bearing ring. This can damage the rotational accuracy of the bearings.

If both the inner and outer rings of a separable bearing (such as a deep groove ball bearing) are in a static fit, the installation and disassembly of the bearing will be extremely inconvenient, and one side of the inner and outer rings will be in a dynamic fit.