The function of bearing fit is to consolidate the stationary ring and Bearing Fit rotating ring of the bearing with the stationary part (usually the bearing seat) and the rotating part (usually the shaft) of the installation part respectively,
so as to realize the basic task of transmitting load and defining the Bearing Fit position of the moving system relative to the stationary system in the rotating state. On the shaft and in the bearing seat, the rolling bearing is required to fix its position in three directions: radial, axial and tangent directions.
Radial and tangential positioning is realized by tight fit of bearing ring, and tight fit is adopted for axial Bearing Fit positioning only in a few cases; Generally, axial limit parts, such as end caps and retaining rings, are used to limit the axial position within the clearance range.
Bearing is an important part of machinery. It can also be said that it is a mechanical joint. Like us, if we don’t have joints, it won’t work. If we don’t have joints, we will be paralyzed. The same is true for machinery. Without bearings, machinery can’t be used. Therefore, machinery can’t be separated from bearings. Leaving bearings is equivalent to scrap.
The use method of bearing is very complex. Some rolling bearings need to be used together. Let’s introduce the use and requirements of this Bearing Fit rolling bearing, and make a foundation for you to be familiar with the bearing in the future.
The following four points should be Bearing Fit paid attention to when selecting the fit
(1) The circumferential surface of the bearing ring shall be well supported and stressed evenly to reduce Bearing Fit deformation and give full play to the bearing capacity of the bearing.
(2) The ferrule cannot slide along the tangent direction in its mating surface, otherwise the mating surface will be damaged.
(3) The free end bearing must be able to adapt to the length change of the shaft and bearing seat hole, that is, it must have the ability to adapt to the swimming of the axial position within a certain range.
(4) Attention must be paid to make the bearing installation and disassembly simple, labor-saving, time-saving and cost-saving.
Angular contact ball bearings can bear both radial and axial loads. It can work at high speed. The larger the contact angle, the higher the axial bearing capacity. High precision and high-speed bearings usually have a contact angle of 15 degrees. Under the action of axial force, the contact angle will increase.
Single row angular contact ball bearings can only bear axial load in one direction, which will cause additional axial force when bearing radial load. And can only limit the axial displacement of the shaft or housing in one direction. If it is installed in pairs, make the outer rings of a pair of bearings opposite,
that is, the wide end face to the wide end face, and the narrow end face to the narrow end face. In this way, additional axial force can be avoided, and the shaft or housing can be limited to the axial clearance in both directions.
Because the raceways of the inner and outer rings of angular contact ball bearings can have relative displacement on the horizontal axis, they can bear both radial load and axial load – combined load
(single row angular contact ball bearings can only bear axial load in one direction, so they are usually installed in pairs). Cage materials include brass, synthetic resin, etc., which are distinguished according to bearing form and service conditions.
The technique of selecting grease for angular contact ball bearing. Grease is a stable solid or semi-solid product composed of dispersing thickener in liquid lubricant, in which additives and fillers aimed at improving some characteristics of grease can be added.