Cylindrical Roller Bearings SKF NJ307 ECJ

The SKF NJ307 ECJ single-row cylindrical roller bearing accommodates high radial forces and unilateral axial loads whilst maintaining compact dimensions of 35 × 80 × 21 mm.

The NJ307 ECJ cylindrical roller bearing is a single-row radial roller bearing with key dimensions of a 35 mm bore, an 80 mm outside diameter and a 21 mm width. Thanks to its optimised internal design and the line contact of the cylindrical rollers, this design can handle heavy radial loads. The bearing is manufactured by SKF and features a sheet steel cage that guides the rollers. As an open component without an integrated seal, it is designed for oil- or grease-lubricated systems.

In which bearing arrangements is the NJ307 ECJ cylindrical roller bearing used?

This roller bearing is used in designs where high radial loads occur and shafts need to be guided in an axial direction. The component is suitable for a temperature range of -30 to +150 degrees. Thanks to the single-sided flange arrangement on the inner ring, the bearing absorbs axial forces in one direction and, in the opposite direction, allows for the compensation of operational length changes.

What does the NJ design with a single-sided removable inner ring mean?

The NJ design functions as a support bearing. The outer ring has two fixed flanges, whilst the inner ring has one fixed flange and is removable from one side. This design facilitates the assembly of separate bearing rings. When selecting the bearing, take into account the standard radial clearance and the tolerance class: Dimensional accuracy corresponds to P0/PN or ABEC 1, whilst running accuracy is defined as P6 or ABEC 3. As the outer ring has neither a groove nor a lubrication bore, the lubricant is supplied via the housing design.