Load Capacity C and C0
The Dynamic Load Capacity C and the Static Load Capacity C0 express the load capacity of a bearing.
The basic dynamic load rating C is used for calculations when the GLYCODUR® bearing is subjected to dynamic stress. It represents the load (constant in magnitude and direction) under which a basic rating service life (expressed as a sliding distance) will be obtained for continuous oscillating movement at a defined sliding velocity and at room temperature. It presupposes that the load acting on bushings and flanged bushings is in a radial direction only and that the load acting on thrust washers is purely axial and acts concentrically.
Dynamic load refers primarily to angular and rotational movements. In addition, micro sliding movements occur, resulting from vibrations or high frequency load changes. Often, the load types mentioned represent a combination of all types. While angular and rotational movements under load will mainly cause wear, other cases may result in material fatigue.
Indication of load capacities is always dependent upon basic definitions. Therefore, load capacity figures from different manufacturers cannot simply be compared with each other.
The Static Load Capacity C0 indicates the maximum load which a bushing, flange bushing or thrust washer can support at room temperature in the static condition, without permanent deformation occurring in the sliding layer that may impair the bearing‘s function. At higher temperatures the static load capacity has to be reduced, depending on the sliding material combination, by the Temperature Factor c3 [more info], which also applies to dynamically loaded bearings. In addition, the permissible temperature application ranges has to be observed for the individual sliding materials.
Load Factor c1
It is of further importance, that the specific surface load factor is included in the static load capacity. Increasing load will reduce the absolute value of the Static Load Capacity by the load factor c1.
– Load Factor c1
Load Distribution Factor c5
Beyond the above-mentioned points, the type of load distribution has an effect on the determination of the service life. This is taken into consideration by the Load Distribution Factor c5.
|c5||=||1.0 for a point-focal load (the load is always at the same point of the bearing‘s perimeter, to be used for axial bearing)|
|c5||=||1.5 for a circumferential load (the load zone travels around the entire bearing perimeter)|