90 mm x 140 mm x 24 mm NSK 6018NR deep groove ball bearings

The online 90 mm x 140 mm x 24 mm NSK 6018NR deep groove ball bearings HM231110, HM231115, compatible cup: parts store gives you 2.23 in inner ring width: immediate access 90 mm x 140 mm x 24 mm to a selection of more than AST BEARING OF AMERICA CORP. 1.4 million new, used, remanufactured.

What is 6018NR bearing interchange？