CSF series bearings utilize a crossed cylindrical roller configuration, with rollers arranged perpendicular to each other at 90° angles within V-shaped raceways. This crossed roller design enables the bearing to simultaneously support axial loads, radial loads, and tilting moments—a critical requirement for harmonic drive output applications.

The defining structural characteristic of the CSF series bearing is its integral ring construction. Both the inner and outer rings are manufactured as single, solid components rather than split designs. This one-piece construction minimizes performance variations during installation and maintains consistent rotational accuracy and rigidity. The bearings are typically supplied with mounting holes on both rings for direct bolted attachment to the reducer housing.