Non-standard bearings are non-standard bearings. In layman's terms, they are bearings that do not conform to the external dimensions specified by the national standards, that is, the external dimensions are different from all bearings specified by the national standards.

Its main characteristics are low versatility, mostly special equipment, special occasion applications, small batches, and new research and development equipment trial products accounted for the majority; but because of its non-scale and batch production, there are not many manufacturers and high costs , The price is more expensive.

The inner or outer diameter, width (height), and dimensions of standard bearings conform to the outer dimensions of the bearings specified in GB/T 273.1-2003, GB/T 273.2-1998, GB/T 273.3-1999 or other relevant standards. Non-standard bearings are non-standard bearings that do not match the size and structure of standard bearings. The structure is different and the bearings are produced according to customer requirements.