Bearings - Friction bearings - Split sleeve bearing
Split sleeve (bush) plain
bearings, known as full bearings in industrial machinery, are commonly used for
larger diameters, such as crankshaft bearings. The two halves are called
shells.There are various systems used to keep the shells located. The most
common method is a tab on the parting line edge that correlates with a notch in
the housing to prevent axial movement after installation. For large, thick
shells a button stop or dowel pin is used. The button stop is screwed to the
housing, while the dowel pin keys the two shells together. Another less common
method uses a dowel pin that keys the shell to the housing through a hole or
slot in the shell.
The distance from one parting edge to the other is slightly larger than the
corresponding distance in the housing so that a light amount of pressure is
required to install the bearing. This keeps the bearing in place as the two
halves of the housing are installed. Finally, the shell's circumference is also
slightly larger than the housing circumference so that when the two halves are
bolted together the bearing crushes slightly. This creates a large amount of
radial force around the entire bearing, which keeps it from spinning. It also
forms a good interface for heat to travel out of the bearings into the housing.
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