| Dimensions The boundary dimensions of SKF angular contact spherical plain bearings conform to ISO 12240-2:1998. Tolerances SKF angular contact spherical plain bearings are made to the tolerances specified in Table n . The tolerances conform to ISO 12240-2:1998. The symbols used in the tolerance table are explained in the following. d nominal bore diameter Admp deviation of the mean bore diameter from the nominal D nominal outside diameter ADmp deviation of the mean outside diameter from the nominal ABs deviation of single inner ring width from the nominal ACs deviation of single outer ring width from the nominal ATs deviation of single bearing width (abutment width) from the nominal |