When selecting SKF bearings, it is necessary to select whether the bearings meet our mechanical use range according to the size, specifications, and speed of the bearings. The following is a simple analysis:
The first is the size limit.
Usually the space in which SKF bearings can be installed is limited. In most cases, the shaft diameter (or bearing inner diameter) is limited by mechanical design or other design. Therefore, the choice of bearing type and size is determined by the inner diameter of the SKF bearing. As a result, the main dimensions of standard SKF bearings are based on the international standard internal diameter dimensions.
Standard SKF bearings are available in a wide range of sizes. It is best to use standard SKF bearings when designing mechanical devices. (This design is easy to purchase from SKF bearings. Here is a question. Some models on the bearing catalogue do have some, but some The SKF bearing is not in stock in mainland China, and sometimes the futures will be for a long time, so the time cost and the cost of later replacement should be taken into account when selecting the bearing. The load of the SKF bearing, the load applied to the bearing, its nature and size. The direction is changeable. Usually, the rated base load is shown on the dimension table. However, axial load and radial load are also important factors in selecting a suitable SKF bearing. When the size of the ball and needle bearing is equivalent, the needle bearing usually has a high load capacity and withstands large vibration and shock loads.
Followed by the speed.
The allowable speed is determined by factors such as the type, size, accuracy, cage type, load, lubrication method, and cooling method of the SKF bearing. The permissible speeds of standard-precision SKF bearings under oil lubrication and grease lubrication are listed on the SKF bearing table. Generally, deep groove ball bearings, self-aligning ball bearings, and cylindrical roller bearings are suitable for high-speed operation.
Again, SKF bearing tolerances.
SKF bearing dimensional accuracy and rotation accuracy are based on ISO and JIS standards. For machines requiring high precision and high speed operation, bearings with 5 or more precision are recommended. Deep groove ball bearings, radial thrust ball bearings or cylindrical roller bearings are suitable for machines with high running accuracy. Rigidity, when the rolling element and the raceway contact surface of the SKF bearing are pressed, elastic deformation occurs. Some machines need to minimize elastic deformation. The roller SKF bearing has a smaller elastic deformation than the ball bearing.
In addition, in some cases SKF bearings are subject to preload to increase rigidity. This program is usually used for deep groove ball bearings, radial thrust ball bearings and tapered roller bearings. The shaft is bent, the shaft or bearing housing tolerance changes, and the misalignment will lead to the eccentricity of the inner and outer rings. In order to prevent the eccentric angle from being too large, automatic self-aligning ball bearings, self-aligning roller bearings, or self-aligning bearing seats are preferred choices. Audio frequency and torque, rolling bearings are manufactured according to high-precision standards, so the sound and torque are small. Deep groove ball bearings and cylindrical roller bearings are suitable for applications where low noise and low torque are required.
Installation and disassembly, some applications require frequent disassembly and installation to ensure regular inspection and repair. SKF bearings such as cylindrical bearings, needle bearings, and tapered bearings that can be installed separately for the inner and outer rings are very suitable for this application. The tapered self-aligning ball bearing and self-aligning roller bearing also simplify the installation procedure with the help of the bushing.
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