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Since the rolling element in thrust tapered roller bearing is tapered roller, structurally, since the rolling bus and the raceway bus of washer meet at a certain point on the axis line of the bearing, the rolling surface can form pure rolling, and the extreme speed is higher than that of thrust cylindrical roller bearing. The thrust tapered roller bearing can bear unidirectional axial load. The type code of thrust tapered roller bearing is 90000. Due to the small production of thrust tapered roller bearings, most of the models produced by various factories are non-standard overall dimensions, while there are few varieties of series with standard overall dimensions. Therefore, at present, there is no national standard for the overall dimensions of this kind of bearings.
The contact angle of thrust angular contact ball bearing is generally 60 °. The commonly used thrust angular contact ball bearing is generally a two-way thrust angular contact ball bearing, which is mainly used for the spindle of precision machine tools. It is generally used together with double row cylindrical roller bearing, and can bear two-way axial load. It has the advantages of high precision, good rigidity, low temperature rise, high speed, convenient assembly and disassembly, etc.
There are many structures of double row tapered roller bearings, a large number of which are 35000 type. There is a double raceway outer ring and two inner rings. There is a spacer between the two inner rings. The clearance can be adjusted by changing the thickness of the spacer. This kind of bearing can bear both radial load and bidirectional axial load, and can limit the axial displacement of shaft and housing within the range of axial clearance of bearing.
The type code of tapered roller bearing is 30000, and the tapered roller bearing is a separate bearing. In general, especially in GB / T307 The outer ring and inner assembly of tapered roller bearing within the size range involved in 1-94 tolerances for radial bearings of rolling bearings can be used interchangeably. The angle of the outer ring and the diameter of the outer raceway are the same as the overall dimensions and are standardized. It is not allowed to change during design and manufacturing. So that the outer ring and inner components of tapered roller bearing can be interchanged all over the world. Tapered roller bearings are mainly used to bear the combined radial and axial load dominated by radial load. Compared with angular contact ball bearing, the bearing capacity is large and the limit speed is low. Tapered roller bearing can bear axial load in one direction and limit axial displacement of shaft or shell in one direction.
Structurally, each ring of deep groove ball bearing has a continuous groove raceway with a cross section of about one-third of the circumference of the equatorial circle of the ball. Deep groove ball bearing is mainly used to bear radial load and certain axial load. When the radial clearance of the bearing increases, it has the property of angular contact ball bearing and can bear the alternating axial load in two directions. Compared with other types of bearings with the same size, this type of bearing has small friction coefficient, high limit speed and high precision. It is the preferred bearing type for user selection. Deep groove ball bearing has the advantages of simple structure and convenient use. It is a kind of bearing with large production batch and wide application range.