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Bearing Data
Roller bearings can be applied universally as ready-to-mount machine elements. This is especially due to the fact that
the main dimensions of the popular bearings are standardized. ISO 15 applies to radial bearings (with the exception
of tapered roller bearings), ISO 355 to metric tapered roller bearings and ISO 104 to thrust bearings. The dimensional
plans of the ISO standards have been taken over in DIN 616 and DIN ISO 355 (metric tapered roller bearings).
In the dimensional plans of DIN 616, each bearing bore has several outside diameters and widths. Popular diameter
series are 8, 9, 0, 1, 2, 3, 4 (increasing outside diameters in this order). There are several width series in each diameter
series, e.g. 0, 1, 2, 3, 4 (the higher the figure the greater the width).
The first figure of the two-digit number for the dimension series indicates the width series (the height series for thrust
bearings) and the second figure the diameter series.
The relations of dimensions are shown in the figures of the by KRW manufacted series od deep groove ball bearings,
cylindrical roller bearings and spherical roller bearings, related to the same bearing bore diameter.
KRW 87