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What does the bearing type mean?
Bearings have many types, there are many classifications, different bearing uses are not the same, so commonly used models to distinguish them.
The first number or first letter or combination of letters indicates the bearing type.
The next two digits determine the ISO size series, the first digit represents the width or height series (size B, T, or H, respectively), and the second digit represents the diameter series (size D).
The last two digits of the basic model number are the size code of the bearing, which is multiplied by 5 to obtain the inner diameter in millimeters.
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