Journal Bearing

Definition - What does Journal Bearing mean?

A Journal Bearing is a comprehensive kind of bearing that contains a journal or shaft that freely rotates in a support with a shell or metal sleeve. In the bearing there are no rolling elements present. The construction and design of these bearings is very simple but the operation and theory is complicated. The Journal Bearing is designed in a plain or straight configuration along with a flange that accommodates the combination of axial and radial loads with the corrosion resistant coatings and materials. These are offered in a water resistant and high temperature series.

Petropedia explains Journal Bearing

The Journal Bearing includes a babbitt, sleeve and shell bearing. The shell journal bearings only accept the radial loading that is perpendicular to the shaft, usually because of the downward load or weight of the shaft. The axial or thrust loads with the axis of shaft can be accommodated by the Journal Bearings which are designed for this purpose. Babbitt Journal Bearings are the softer metal layers that form a contact surface of metal on the bearing shell. Being softer metals, they can overlay the strong steel support shells. They are required to cushion the shells from hard rotating shafts.

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