Suffix letter meanings of TIMKEN bearing

The suffix letters of TIMKEN bearings have special meanings:

These lettered exporting bearings with inner/outer ring, double inner rings or double outer rings are not interchangeable with the products .of basic model 

AB outer ring, with flanged outer ring, not interchangeable with the outer ring of the basic model

AC inner ring, it has different inner diameters and rounded outer diameters, to match the outer ring with different internal geometries, and different from the outer diameter of inner ring /width/or rounded radius of the basic model  

AD outer ring, a double- outer ring, which is not interchangeable with the outer ring of the basic model

CR inner/outer ring, a bearing series with ribs on the outer ring

CX inner ring, the size is different from the inner ring of the basic model, and they are not interchangeable.