Cylindrical Roller Bearings SKF NUP311 ECP

The SKF NUP311 ECP single-row cylindrical roller bearing (55x120x29 mm) acts as a fixed bearing and accommodates high radial forces as well as axial loads on both sides.

With the SKF NUP311 ECP cylindrical roller bearing, users are provided with a single-row radial roller bearing in the Explorer design. The bearing has a bore of 55 mm, an outer diameter of 120 mm and a width of 29 mm. Thanks to its optimised internal design, this bearing type can handle heavy radial loads. With fixed flanges on the outer ring and a loose flange disc on the inner ring, the design guides the shaft in both axial directions. This design is suitable for heavy-duty industrial gearboxes and machine shafts.

In which assemblies is the NUP311 ECP cylindrical roller bearing used?

As a fixed bearing, the NUP311 ECP cylindrical roller bearing fulfils the dual function of absorbing high radial loads whilst simultaneously limiting axial displacement of the shaft in both directions. Typical applications include general mechanical engineering as well as heavily loaded gearboxes and shaft guides. As the bearing is of an open design, the surrounding structure requires targeted lubrication and an effective sealing system to protect against dirt and moisture. The design contributes to smooth running during continuous operation.

What are the distinctive features of the polyamide cage and the ECP design?

The suffix ‘ECP’ denotes an optimised internal design featuring a lightweight polyamide cage. This cage guides the cylindrical rollers with low friction and elastically absorbs dynamic accelerations during operation. With dimensional accuracy to tolerance class Normal (P0/PN or ABEC 1) and improved running accuracy to class P6 (ABEC 3), the bearing ensures precise concentricity. The design must take into account the permissible temperature range of -30 to +120 degrees, which is determined by the material of the cage.