The suffix defines special designs and features ➤ Figure and ➤ Figure. The prefix normally identifies individual bearing parts of complete bearings (in certain cases, this may also be part of the basic designation) ➤ Figure and ➤ Figure. The basic designation contains the symbols for the bearing series and the bearing bore ➤ Figure, ➤ Figure and ➤ Figure. The diameter and width series are described in ➤ section. It indicates the type of bearing, the diameter series and, in many cases, the width series too ➤ Figure, ➤ Figure and ➤ Figure. The designation for the bearing series comprises numbers and letters or letters and numbers. The designation is a code comprising numbers and letters These designations are also used in many other countries. In Germany, the bearing designations are standardised in DIN 623-1. In the case of separable bearings, it cannot always be ensured that individual parts with the same origin can be interchanged with each other. 3FE ➤ Figure.ĭimension plan for tapered roller bearings (excerpt) to ISO 355Ĭontact angle series (range of contact angles)Įach rolling bearing has a designation that clearly indicates the type, dimensions, tolerances and internal clearance, if necessary with other important features.īearings that have the same standardised designation are interchangeable with each other. The dimension series are designated in these by a combination of three symbols, e. g. Tapered roller bearings can generally also be classified in the dimension plans to ISO 355 ➤ Figure. If the bearing bore code is then added, ➤ section, the bearing size is completely defined.ĭimension plan for metric tapered roller bearings to ISO 355 When this table is used, for example, for a radial bearing of the width series 2 and the diameter series 3, this gives the dimension series 23 ➤ Table and ➤ Figure. The specific number of the width and diameter series, when combined, identifies the dimension series ➤ Table. The dimension series is created from the width series and the diameter series for the identification of diameter series, the numbers 7, 8, 9, 0, 1, 2, 3, 4, 5 ➤ Figureįor radial bearings to DIN 616 and ISO 15.In the case of radial bearings in accordance with DIN 616 and ISO 15, these are as follows: Width and diameter series are described using numbers. Width and diameter seriesīearing series are described using numbers The development of new bearing series and individual new rolling bearings in accordance with the dimension plans has considerable advantages for users and manufacturers. In this way, it is possible to design several bearings of the same type that, for the same bore, exhibit different load carrying capacities. In the dimension plans, one bearing bore is allocated several outside diameters and width dimensions. Several outside diameters/ width dimensions are assigned to one bearing bore As a result, a designer working on the same design envelope can make a selection between bearings of several types with the same external dimensions. Standard rolling bearings of different types can thus be manufactured to the same external dimensions. The dimension plans are valid for different bearing types. ISO dimension plansĮxperience has shown that the predominant proportion of all bearing arrangement tasks can be fulfilled using bearings with standard dimensions, which are contained in ISO dimension plans. An overview of ISO and DIN rolling bearing standards is given in DIN 611:2010-05. ISO 355 : 2007 for tapered roller bearingsĭIN 616 describes dimension plans for radial and axial bearings.ISO 15:2017 for radial rolling bearings, excluding single row needle roller bearings, insert bearings and tapered roller bearings.The main dimensions of metric rolling bearings are defined in the following ISO dimension plans: Standardisation is not, however, applied to the internal dimensions, such as the size and quantity of the rolling elements for example. The dimensions which determine the installation space are standardised. Standardised and non-standardised dimensions They include ➤ Figure:ĭeep groove ball bearing (radial bearing)Īxial deep groove ball bearing (axial bearing) The main dimensions are the key dimensions of a rolling bearing.
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