ISO 15:2011 pdf free download – Rolling bearings一Radial bearings一 Boundary dimensions, general plan.
The object of the general plan (this International Standard) is to restrict the number of radial bearing sizes enough to ensure economic production, yet to provide a sufficient number of sizes to satisfy present and future needs of bearing users.
These needs are comprehensive and varying. Therefore, the general plan needs to embrace a wide range of numerically determined sizes and proportions and can even be extended according to the guidelines given in Annex A.
Tapered roller bearings, insert bearings and some types of needle roller bearings and instrument precision bearings standardized by ISO do not conform to this International Standard because the dimensions given are not found to be optimal for the bearings in question.
5 Boundary dimensions
Boundary dimensions for radial bearings of the diameter series 7, 8, 9, 0, 1, 2, 3 and 4 are given in Tables 1 to 8.
The chamfer dimensions given in Tables 1 to 8 do not always apply to:
the groove side of bearing rings with snap ring groove; these are specified in ISO 464;
the loose rib and the non-rib sides of cylindrical roller bearing rings; the exceptions are specified in ISO 12043;
the non-thrust side of angular contact bearing outer rings; these are specified in ISO 12044.
Chamfer dimension, r, applies at the corners indicated in Figure 1 and is specified with r’s min in Tables 1 to 8.
The chamfer dimensions for inner rings of bearings with tapered bore may be smaller than those shown in Tables 1 to 8.
The corresponding largest single chamfer dimensions to the r’s min dimensions in Tables 1 to 8 are given in ISO 582.