Cylindrical Roller Bearings SKF NU2308 ECP

The SKF NU2308 ECP single-row cylindrical roller bearing (40x90x33 mm) is a separable idler bearing designed to withstand high radial loads.

The NU2308 ECP cylindrical roller bearing is an open, single-row radial roller bearing from SKF’s Explorer performance class. With a bore of 40 mm, an outside diameter of 90 mm and a width of 33 mm, the design can withstand high radial loads. The ECP design features an optimised internal structure combined with a lightweight polyamide cage. The rolling bearing has standard radial clearance and operates reliably within a temperature range of -30 to +120 degrees Celsius.

In which applications is the NU2308 ECP idler bearing used?

Design engineers and maintenance personnel primarily use this cylindrical roller bearing where purely radial forces are acting and changes in shaft length need to be compensated for. As a floating bearing of the NU design, the component has two fixed flanges on the outer ring, whilst the inner ring is flangeless. This allows the inner ring to be removed from both sides and enables it to move axially relative to the housing without constraint during thermal expansion in operation. Its use is recommended for rigid shaft guides with a separate fixed bearing.

What are the functions of the NU design and the polyamide cage?

The polyamide cage guides the cylindrical rollers precisely and reduces both the weight and the friction within the rolling element set. As the inner and outer rings can be fitted separately, the bearing facilitates installation in cases of tight fits. As this is an open bearing without an integrated seal, the bearing location must be sealed and lubricated via the housing. In terms of precision, the bearing offers dimensional accuracy to P0/PN (ABEC 1) and increased running accuracy to P6 (ABEC 3).