Cylindrical Roller Bearings SKF NJ309 ECP

The SKF NJ309 ECP cylindrical roller bearing, with a 45 mm bore and an outer diameter of 100 mm, offers high radial load-carrying capacity in a compact design.

This single-row NJ309 ECP cylindrical roller bearing is part of the SKF Explorer series and features an optimised internal design. Thanks to the line contact between the cylindrical rollers and the raceways, the bearing can accommodate high radial loads. In the NJ version, the bearing acts as a support bearing: solid flanges on both the outer ring and the inner ring enable it to accommodate axial forces in one direction.

What loads and movements does the NJ309 ECP cylindrical roller bearing accommodate?

This design is intended for bearing arrangements where high radial forces are combined with one-sided axial forces. As the inner ring can be removed from one side, the roller bearing can be mounted flexibly and separately onto the shaft and housing. In the opposite direction, the internal geometry allows for axial displacement. This enables the bearing to compensate for operational thermal length changes in the shaft within the bearing housing.

What are the key features of the polyamide cage and open design?

The integrated polyamide cage guides the rollers, reduces friction during operation and has a low weight. The permissible temperature range extends from -30 to +120 degrees. The open design has no integrated seals, meaning that lubricant is supplied directly via the bearing housing. At the same time, a housing seal provided by the customer protects the raceways from the ingress of contaminants.