A spherical outer diameter tapered roller bearing pillow block system (100) for supporting the rotating main shaft of a wind turbine.

The pillow block bearing is made from igumid G, an extremely impact-resistant, long-fibre-reinforced polymer.

In another aspect of the invention, the labyrinth seal (s) is (are) tight fitting seal (s), and the pillow block assembly is provided with a grease bypass passage.

When using an SNLN 30 housing for this arrangement (fig. 3), the dimensions of the abutment ring and the spacer sleeve must fit the housing.

For a purely axial force, static or dynamic, the permissible load on the housing should not exceed 65% of P180°.