Cylindrical Roller Bearings SKF NJ209 ECP

The SKF NJ209 ECP cylindrical roller bearing, measuring 45x85x19 mm, offers high radial load-carrying capacity and axial guidance in one direction.

As a single-row roller bearing, the NJ209 ECP can accommodate very high radial loads. In this design, the outer ring guides the rollers with two fixed flanges, whilst the inner ring has a single flange. As a result, the bearing acts as a support bearing and accommodates axial forces in one direction. In the opposite direction, the design allows for axial displacement, which compensates for thermal length changes in the shaft. SKF manufactures this version in the Explorer performance class with optimised internal geometry.

What is the NJ209 ECP cylindrical roller bearing suitable for in operation?

Typical applications are found in general mechanical engineering and in industrial shaft bearings where significant radial loads are present. Due to its NJ design, the bearing fixes the shaft axially on one side, so it is often arranged in combination with a floating bearing or an additional support bearing. The polyamide cage reduces friction and inertial forces within the rolling element set. As this is an open bearing, the lubricant supplied by the surrounding structure ensures low wear.

What are the distinctive features of the NJ design with a polyamide cage?

The design allows the inner ring to be pulled off from one side, which facilitates the separate mounting of the inner and outer rings onto the shaft and housing. The polyamide cage is suitable for a temperature range of –30 to +120 degrees Celsius. When designing the bearing, you should take into account the standard radial clearance, which ensures smooth running with typical fit selections. Dimensional accuracy corresponds to class P0/PN (ABEC 1), whilst running accuracy, at P6 (ABEC 3), has tighter tolerances.