The Unit to Study a Shaft with Journal Bearings Assembly, "SJBA", consists of two split shaft bearings and one ground steel shaft. The slide bearing consists of two parts, the journal which is the part of the shaft that is in contact with the bearing, and the surrounding sleeve which is the bearing itself.

The study of bearings is intimately linked to the study of the lubricant film that is placed between the moving parts. Bearings are easily assembled thanks to lubrication.

This lubrication can be obtained, for example, by using grease supplied to the bearing through a Stauffer bushing which is screwed to a lubrication channel located in the top cap bearing.

In order to distribute the grease through the entire bearing, the top cap bearing has a flat lubrication groove that is used on its sliding surface. This is smooth enough for the lubricant to be drawn by the shaft as it rotates. The lubricant must also provide tightness to the bearing in order to prevent dirt from entering from the outside.

The typical paste for material testing is used to control the bearing alignment. This type of bearing is limited by the admissible load to be supported in order to form the lubricating film, but when this drawback doesn't occur, they can be used in rotating bodies at high speeds and with low noise.

The bearing clearance can be measured by using a set of calibrated plastic threads.

A case is provided to facilitate transportation and to ensure the protection of components needed.