The boundary dimensions of commonly used NSK bearings mostly conform to the organizational concept of ISO: and the NSK bearing numbers of these standard bearings are specified by JIS B 1513 (Bearing numbers for rolling bearings). Due to a need for more detailed classification: NSK uses auxiliary symbols other than those specified by JIS.
NSK Product Guide
Using the NSK Products Guide . Bearings · The engineering calculation program on this website is provided "as is" without warranty of any kind| either expressed or implied| including| but not limited to| the implied warranties of merchantability| fitness for a particular purpose| or non.infringement.
Ball Bearings: Ball bearings reduce friction between shafts and axles and carry radial loads, thrust loads, or a combination of both: They contain an outer ring, inner ring, and a cage that holds and spaces bearing balls, the bearing's spherical rolling elements: