The model number of a ball bearing is an important identifier indicating its size and performance. Here are some common classification methods:
Size Representation: The size of a ball bearing is usually expressed based on the inner ring diameter (d). For example, the 6000 series indicates an inner ring diameter of 60mm. Depending on the specific model, parameters such as the outer ring diameter and width can be determined.
Letter Representation: In ball bearing model numbers, letters are often used to represent different technical parameters and performance requirements. For example, the letter A indicates that the bearing has a higher limiting speed, while the letter B indicates that the bearing has a larger radial load capacity.
Numerical Representation: In ball bearing model numbers, numbers are usually used to represent different design serial numbers and improvement numbers. The numbers indicate changes and optimizations in the bearing's design and materials.

