Calculation

DURBAL® Premium Line

Static basic load rating of antifriction bearing rod ends and spherical-plain bearings

The static basic load rating Co of an antifriction bearing rod end and spherical-plain bearing corresponds to that of a static radial load causing a lasting overall deformation of 1/10.000 of the roller body diameter at the contact point most highly stressed between roller body and raceway.

Dynamic basic load rating of antifriction bearing rod ends and spherical-plain bearings

The dynamic basic load rating C of an antifriction bearing rod end and spherical-plain bearing is the external radial load, unchangeable in size and direction, at which 90 % of a large quantity of obviously identical rod ends will reach or exceed 1 million of rotations or swivelling movements.

DURBAL® Classic Line

Static basic load rating of plain bearing rod ends

The static basic load rating Co of a plain bearing rod end corresponds to the static radial load that does not yet cause a lasting deformation at the weakest housing section. It contains at least a 1.2 fold security compared to the yield stress of the material used for the rod end housing.

Dynamic basic load rating of plain bearing rod ends 

The dynamic basic load rating C is a variable applied in estimating the expected operating life of dynamically stressed, maintenance-free plain bearing rod ends.

DURBAL® Basic Line

Static basic load rating for plain bearing rod ends and spherical-plain bearings 

The maximal admissible load of a rod end or spherical-plain bearing is specified by the static load rating Co that is indicated in the catalog. The static load rating Co of a rod end or spherical-plain bearing corresponds to the static radial load that

does not yet cause a lasting deformation at the weakest housing section of the rod end or spherical-plain bearing during standstill at room temperature. In all cases the user has to coordinate the theoretical selection criteria with the concrete installation situation and check the suitability of the rod end respectively spherical-plain bearing. In this context the user has to define sufficient security factors and maintenance intervals. Whenever the load is defined at the upper limit of the load rating DURBAL Vertriebsgesellschaft is recommending to use DURBAL®-heavy-duty rod ends or spherical-plain bearings from our series Premium- or Classic-Line.

Our specialists are happy to advise you.

Basic load ratings always depend on the definitions they are based on. For this reason it is not always possible to compare basic load rating data supplied by different manufactures.