Knowledge of precision thin-wall bearings
RA series thin-walled crossed roller bearings (split outer ring type) are small and lightweight crossed roller bearings with very thin outer and inner rings. They are small and can withstand heavy loads, so they are suitable for use on equipment. The mounting parts of the bearings can be lightweighted.
The size of the inner and outer rings of the RB series thin-walled crossed roller bearings (split outer ring type) is minimized to the maximum extent. Its structure is that the outer ring is two divided parts and the inner ring is an integrated structure. It is most suitable for applications that require an inner ring. Where rotation accuracy is high.
RE series thin-walled crossed roller bearings (inner ring split type) have a structure in which the inner ring is divided into two parts and the outer ring is an integrated structure. It is most suitable for places where high rotation accuracy of the outer ring is required.
The SX series (two-half outer ring type, inner ring rotation, ultra-thin) has a similar structure to the RB series. It adopts an ultra-thin design and has a smaller cross-sectional size than the RB series. The outer ring is divided into two halves, and the inner ring is Integrated design, connected through three fixed rings. The outer ring and inner ring have no mounting holes. The flange and support base are required for installation. It is suitable for parts with high rotation accuracy of the inner ring.
Thin wall ball bearings:
Deep groove ball bearings: 6900, 6800, 6700, 618, 619 and other series are thin-walled bearing series.
In addition, there are many thin-walled models abroad.
Thin-walled angular contact ball bearings: 718, 719 and other series are also thin-walled bearing series.
Thin-walled ball bearings mean that the ratio of the inner diameter and outer diameter of the bearing is less than a specified value. When the ratio of the bearing outer diameter to the bearing inner diameter is less than 1.25, it is called a thin-walled ball bearing. This means that the value of the bearing's outer diameter-inner diameter is very small and the bearing wall is very thin, so it is called a thin-walled ball bearing.
Thin-walled ball bearings require high precision. Because their walls are very thin, the weight they can carry is also very low, and their impact resistance is very poor. Therefore, the choice must be made according to the use environment!
Thin-walled ball bearings have a simple structure and are easy to use. It is mainly used to bear radial loads, but when the radial clearance of the bearing is increased, it has certain performance of angular contact ball bearings and can bear combined radial and axial loads. When the rotation speed is high and it is not suitable to use thrust ball bearings, it can also be used to bear pure axial load. Compared with other types of bearings of the same size, this type of bearing has a small friction coefficient and a high limit speed. But it is not impact resistant and not suitable for bearing heavy loads.
Usage: Model aircraft, remote control cars, machine tools, motors, water pumps, agricultural machinery, textile machinery, laser printers, instruments, measuring instruments, electronic accessories, motors, motors, etc.
The structure of thin-walled bearings (thin-walled bearings with constant cross-section) is the same as that of angular contact balls, except that the wall thickness is small, the width is narrow, and the processing is difficult. Thin-walled ball bearings of equal cross-section are mainly used in aerospace, medical machinery, robotics and other industries, and have extremely strict requirements on installation space. Due to the high precision requirements and difficulty in processing, thin-walled ball bearings with equal cross-sections still mainly rely on imports. Semri Bearing has been developing this type of bearings for more than three years and has been supplying well-known domestic companies. The quality of its products has been highly praised by customers.
Thin-walled ring bearings are highly precise, very quiet and have high load-bearing capacity. These ball bearings come in three designs and are extremely small and mostly square in cross-section. In these series, the cross-section remains unchanged even with larger shaft diameters and bearing bores. These bearings are therefore called constant section. It is this characteristic that distinguishes thin-walled ring bearings in the standard ISO series from conventional bearings. Therefore, it is possible to choose a larger cross-section and use bearings with a higher load-bearing capacity without having to change the shaft diameter. Thin-walled ring bearings can be designed to be extremely light and require very little space.
