Cylindrical Roller Bearings SKF NU212 ECJ/C3

The SKF NU212 ECJ/C3 cylindrical roller bearing is a single-row non-locating bearing with dimensions of 60 × 110 × 22 mm, a sheet steel cage and a slightly increased C3 radial clearance.

As a single-row roller bearing, the NU212 ECJ/C3 can accommodate high radial loads. Thanks to its optimised internal design, this version is suitable for demanding bearing arrangements in mechanical and plant engineering. As a NU-type non-locating bearing, the bearing has two fixed flanges on the outer ring, whilst the flangeless inner ring can be removed from both sides. This enables the component to compensate for axial length changes in the shaft with low friction within the bearing. At the same time, the separable design facilitates the separate installation of both bearing rings.

When is the NU212 ECJ/C3 cylindrical roller bearing used?

Design engineers and maintenance personnel primarily use this design where high radial loads occur and axial shaft expansion must be accommodated. As the inner ring has no flanges, this bearing does not accommodate any axial forces. In the bearing arrangement, it functions purely as a non-locating bearing for the radial guidance of the rotating shaft. The open design allows lubrication with lubricating oil or grease within a temperature range of -30 to +150 °C.

What is the function of the C3 clearance and the sheet steel cage?

The version with bearing clearance class C3 has a larger radial bearing clearance than the standard class. This additional reserve is intended to prevent the rolling elements from becoming jammed if temperature differences arise between the shaft and the housing during operation, or if tight fits are selected. The integrated sheet steel cage guides the cylindrical rollers with low internal friction and is proven to be vibration-resistant. As this is an open design, a suitable seal must be provided around the housing to reduce the ingress of dirt particles and retain the lubricant within the bearing seat.