Pivotlagers

A bearing is a mechanical element that allows relative motion between two parts while reducing friction and wear on the machinery.

It also helps distribute loads, which could be radial, axial, or a combination of both.

Pivot bearings support an axial load on a rotating shaft. They may have a flat, a conical, or a truncated surface.

Consider a flat pivot bearing subjected to an axial load with a total bearing area of πR².

The uniform pressure on the bearing is expressed as the ratio of the load over the bearing area.

Next, consider an infinitesimal ring of radius r and thickness dr within the bearing area; the load transmitted to the ring can be estimated.

Now, the frictional force resisting the sliding of the ring acts tangentially at the radius r.

So, by calculating the moment of the ring and integrating it within the radial limits, the moment of the shaft can be estimated, which is required to overcome the frictional forces.