Page 10 of catalogue High precision bearings for combined loads of Schaeffler Technologies GmbH & Co. KG

Design and safety guidelines Basic rating life

The load carrying capacity and life must be checked for the radial and axial bearing component. Please contact us in relation to checking of the basic rating life. The speed, load and operating duration must be given. The static load safety factor S0 indicates the security against impermissible permanent deformations in the bearing. It is determined as follows:

Static load safety factor

S0 =

C 0r C or 0a F0r F0a

S0 – Static load safety factor C0r, C0a N Basic static load rating according to dimension Tables N F0r, F0a Maximum static load on the radial or axial bearing.

Caution!

In machine Tools and similar areas of application, S0 should be

4.

Static limiting load diagrams

Caution! Axial/radial bearings Axial Angular contact ball bearings

The static limiting load diagrams can be used: ■ for rapid checking of the selected bearing size under predominantly static load ■ for calculation of the tilting moment Mk that can be supported by the bearing in addition to the axial load. The limiting load diagrams take account of the static load safety factor S0 4 for the rolling element set as well as the screw and bearing ring strength. The static limiting load must not be exceeded when dimensioning the bearing arrangement. Example: see Figure 2. The static limiting load diagrams for YRT, YRTS and RTC are shown in Figure 3, page 10 to Figure 9, page 12. The static limiting load diagrams for series ZKLDF are shown in Figure 10 and Figure 11, page 13.

Bearing/size Permissible range Impermissible range Mk = max. tilting moment Fa = axial load

3

Mk 2

1

Figure 2 Static limiting load diagram – example

Fa

Schaeffler Group Industrial

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