SLEWING BEARINGS WITH TRIPLE ROLLER BEARING ROWS, OUTER GEAR TEETH
 
Description 
ISB slewing bearings in the ER3 standard series are comprised of three rows of crossed roller bearings, two of which accommodate axial loads and the other radial loads, separated by a spacer in Nylon, with outer gear teeth. The triple row construction is comprised of three forged rings, one of which with outer gear teeth and two which form the untoothed inner ring, bound together with screws. The load applied  to this type of bearing is distributed across the three rows of rollers in the same way and in the directions in which it is applied, without angular decomposition. This allows the triple roller row structure to withstand very heavy loads with high tilting moments.
 
Advantages
ISB slewing bearings in the ER3 standard series are the only solution when the static load or fatigue cycle values of the bearing are too high for all other types of slewing bearings.
 
Special technical features
ISB slewing bearings in the ER3 standard series are generally used with a vertical axis, but are also typically and frequently used with a horizontal axis and steel cage.
 

ISB slewing bearings in the ER3 standard series are used mainly in the following sectors:
* port cranes;
* ship cranes;
* crane trucks;
* mixing silos;
* sand storage systems;
* sawdust or waste;
* etc.
 
ER3