Many people do not know what non-standard bearings are, let BENOY take you to explain

Non-standard bearings, in general terms, are bearings that do not meet the external dimensions specified by national standards, that is, all bearings whose external dimensions are different from national standards.

Its main features are low generality, mostly for special equipment and special occasions, small batches, and trial products of new research and development equipment account for the majority; but due to its non-scale and batch production, there are not many production enterprises and high costs , The price is more expensive. Non-standard bearings Standard bearings have inner or outer diameters, width (height) degrees, and dimensions in accordance with GB / T273.1-2003, GB / T273.2-1998, GB / T273.3-1999 or other relevant standards. Model size. E.g. Non-standard inside and outside 49 standard 50 everything else is the same. Then 49 is a non-standard. You have to follow the size and structure of the client book. Otherwise, you know if 49 is a national standard or 50.