A bearing with the code SKF 6212 has what size bore?

The bearing code SKF 6212 indicates several critical dimensions about the bearing, particularly its bore size. In the designation, the number "62" corresponds to the series and type of the bearing. Specifically, the first digit "6" identifies it as part of a family of deep groove ball bearings. The following digits "12" indicate the series and the bore size.

To derive the bore size from the code, you can use a simple formula for metric bearings. The first two digits after the series number indicate the bore diameter in millimeters. Therefore, for the code 6212, the last two digits "12" signify that the bore is 12 millimeters.

This understanding of bearing codes is crucial for millwrights and other professionals in the field, as it allows for selecting the proper bearings for their applications without needing to consult additional specifications. Knowing how to interpret these codes helps in the effective maintenance and operation of machinery, ensuring optimal performance and longevity of mechanical components.