NKE UCF208-109 Flanschlager-Gehäuseeinheiten

As a housed bearing unit, this product combines a housing with a ready-to-mount bearing insert. This NKE bearing measures 39.68x130x49.2 mm and weighs 1.79 kg; the specification table carries the supplementary technical details. Two sealing stages ahead of the rolling chamber extend the relubrication interval and the service life of the grease charge — both maintenance quantities, not merely protection ratings.

The double seal of this bearing unit acts above all on operation over time. A single lip works against every ingress that reaches it and wears correspondingly fast where the environment is dusty or damp; a second stage placed ahead of it relieves the lip of the coarse share. In practice this shows less in the new condition than in the maintenance plan: the grease charge stays clean for longer, the relubrication interval can be set wider, and the point at which contamination in the rolling contact leads to indentations is pushed back.

For the layout this means orienting the degree of protection to the actual environment and to the planned maintenance effort, and not to the size alone. The construction follows the usual design: the insert bearing is already mounted in the housing, sits with its spherical outer surface in the housing's seat and aligns itself to the shaft as it is bolted on, so that an angular offset between the mounting face and the shaft is taken up; the force is led over an area through the flange into the adjacent construction, and load capacity is to be considered primarily in the radial direction.

No separate catalogue attribute for the material of the housing of these items is available. That information is to be taken from the type designation and the specification table, since a cast body and a formed sheet metal housing differ markedly in stiffness, damping, behaviour under shock load and corrosion behaviour — and therefore also in what they require of the mounting face.