What is the rated speed of the bearing ring

The rated speed of the bearing ring refers to a standard value calculated during the design and manufacturing stage based on the bearing's geometric dimensions, materials, lubrication methods and other factors. It means that at this speed, the bearing ring can run for a long time without premature wear. or damaging effects.

Definition of bearing rated speed:

The rated speed of the bearing ring is usually represented by the symbol n, and the unit is revolutions per minute (rpm). The rated speed is the result of comprehensive consideration of factors such as friction, heat generation, and radial and axial loads on the inner and outer rings under standard test conditions. It is a reference value provided by the manufacturer to guide users to determine the appropriate speed range in actual applications.

Factors affecting the rated speed of bearings:

Dimensions and geometry: The geometry and dimensions of the bearing ring directly affect its rated speed. Bearings with larger sizes usually have lower speed ratings, while bearings with smaller sizes usually have higher speed ratings.

Materials and heat treatment: The use of high-strength, high-hardness materials, as well as appropriate heat treatment processes, can help increase the rated speed of the bearing. High-strength materials can reduce the deformation and deformation of the bearing and improve its stability.

Lubrication methods and lubricants: Lubrication is one of the key factors in bearing operation. Different lubrication methods and lubricants affect bearing friction, heat generation and speed performance. In high-speed operation, oil lubrication is usually used to provide better cooling and friction properties.

Preload and clearance: Moderate bearing preload can improve its rigidity, reduce vibration, and help increase the rated speed. The design of the clearance also needs to be reasonable. It should not be too small to cause excessive friction, nor too large to cause the bearing to be unstable during high-speed operation.

Bearing type: Different types of bearings, such as deep groove ball bearings, angular contact ball bearings, etc., may have differences in rated speed. Selecting the right bearing type for a specific application can help increase the rated speed.

Precautions for use of rated speed:

Working condition considerations: The rated speed is a value obtained under standard test conditions, and actual working conditions may be different. In application, it is necessary to consider the matching between the rated speed and actual working conditions, as well as factors such as temperature, load, vibration, etc.

Overload and overspeed avoidance: Avoid using the bearing beyond its rated speed and load. Doing so may cause the bearing to fail prematurely and shorten its service life.

Regular inspection and maintenance: For high-speed running bearing rings, regular inspection and maintenance are very important. Checking the lubrication condition, whether the bearing has abnormal vibration, temperature rise and other indicators, and regularly replacing the lubricant will help maintain the performance of the bearing.