Radial ball bearings are a universal design that can withstand loads of different sizes in high speed movements. The rolling bearings of this type consist of sets of precision ball and cage and inner and outer rings. The standard radial ball bearing has a deep groove structure that can withstand radial loads from any direction and small axial loads. The radial ball bearings with maximum load capacity mainly bear radial loads.
Radial ball bearings are widely used in general industry, automotive industry, agriculture, chemical industry and household appliances industry.
They can be mounted in pairs or separated by gaskets or sleeves, and in some designs, more than three bearings are arranged together as required by the spindle. High-speed spindles (such as internal cylindrical grinding tools) mostly use a single bearing, and commonly use compression springs to eliminate the bearing inner and outer ring and ball clearance.
After this way of installation, the bearing ball and the inner and outer ring contact point line, that is, the contact angle line along the direction of the rotation axis diffusion, so increase the radial and axial rigidity, the maximum resistance to deformation.
With this way of installation, bearing ball and the inner and outer ring contact point of the line, that is, the contact angle line along the direction of the rotary axis convergence, while the inner ring bearing out of the outer ring, when the two bearing outer ring pressed together, the original clearance between the outer ring began to eliminate.
The bearings mounted in this way, two spinning with preloaded radial ball bearings can share the working load. This arrangement makes the bearing contact angle line the same direction and parallel, but in order to ensure the axial stability of the installation, two bearings with the same arrangement must be placed on both ends of the shaft.
Radial ball bearings in the role of the cycle load, the contact surface is easy to fatigue damage, that is, cracking and peeling, will greatly affect the service life of the bearing. Therefore, in order to prolong the service life of bearings, bearing steel must have a high contact fatigue strength.
When the radial ball bearing completes its task, not only rolling friction occurs between the collar, rolling body and maintenance frame, but also sliding friction, which makes the bearing parts wear all the time. In order to reduce the wear of bearing parts, maintain the stability of bearing accuracy and prolong the service life, bearing steel should have good wear resistance.
Hardness is one of the important indicators for evaluating the quality of radial ball bearings, and has an indirect effect on contact fatigue strength, wear resistance, and elastic limit. Bearing steel hardness in use, individual to reach HRC61~65, higher hardness can make the bearing obtain higher contact fatigue strength and wear resistance.
In order to avoid rusting in the process of processing, posting and use, bearing steel should have good anti-rust performance.
Radial ball bearing parts in the process, to go through many cold, hot processing procedures, in order to meet the small amount, high effectiveness, high quality requirements, bearing steel should have good processing performance. For example, cold, hot forming performance, cutting performance, hardenability, etc.
According to the main guidelines for the working capacity of bearings, the materials used to make them should have a certain load carrying capacity, embeddedness, thermal conductivity, low coefficient of friction, smooth surface, resistance to wear, fatigue and corrosion.
Bearing alloys (pasteurized alloys) are widely used.
Bronze bearings are suitable for low-speed, heavy-duty applications where the shaft and bearing alignment is good, and can be made from a variety of alloy components to obtain a variety of physical properties.
This bearing has a higher load carrying capacity than the bearing alloy, its adaptability is less, so it is used for good rigidity of the shaft and good alignment.
Cast iron bearing materials are widely used in less demanding applications. The hardness of the journal must be higher than the hardness of the shaft shank. The working surface must be carefully run with a mixture of graphite and oil. Good alignment between journal and bearing is required.
In high temperature situations, or when traditional lubrication methods cannot be used, pure carbon bearings can achieve satisfactory results. Polytetrafluoroethylene is a very common plastic. Bearings made of it have a very low coefficient of friction and are used in oil-free lubrication, it can work at low speeds or intermittent oscillation and heavy loads.
Radial bearings (also called radial bearings) are rolling bearings that can mainly or only bear radial loads with a nominal pressure angle of 0~45. Radial bearings can be further divided into 0’s of radial bearings according to their nominal contact angle, such as deep groove ball bearings, cylindrical roller bearings and needle roller bearings, etc.
Radial bearings can be divided into radial contact bearings and radial angular contact bearings according to the nominal contact angle.
