SKF support rollers with axial guidance are non-separable units and are especially suitable for applications where lateral (thrust) surfaces are not available. Thrust forces resulting from alignment errors or inclined running are taken up by side washers or flange rings; the side washers are either loose or pressed on to the inner ring. When designing the associated components and mounting the support rollers it is important to ensure that the flange rings and inner rings with pressed-on washers and located without axial play. If larger thrust forces are expected, it is recommended that axial support is also provided for the washers which are pressed on the the inner ring.

SKF Support roller of the NATR design

SKF support rollers of the NATR design incorporate cage-guided needle rollers and permit relatively high speed operation. The outer ring is guided by the side washers which are pressed on the the inner ring; the washers form gap-type seals with the outer ring.

The outer ring is particularly thick-walled and intended for heavy loads and also shock loads.

SKF support rollers with axial guidance, NATV design