Page 26 - Y-bearing-units

Selection of Y-bearing

unit type

The SKF Y-bearing unit assortment is extensive. Keep in mind that the total cost of a bearing
It includes three designs with a choice of three arrangement and inventory considerations could
different materials for the housing and a variety also influence the final choice.
of Y-bearings that can be locked onto the shaft Other important criteria for designing a bear-
in very different ways. Because of their design, ing arrangement, such as load carrying capacity
each Y-bearing unit exhibits characteristic and rating life, lubrication, etc., will be dealt with
features that make it more or less suitable for in detail in the corresponding chapters.
a specific application.
For example, Y-bearing units with a pressed
steel housing are not capable of supporting
heavy loads, can only run at moderate speeds
and can not be relubricated. However, they are
economical and easy to mount. On the other
hand, housings made of grey cast iron can with-
stand significantly heavier radial, axial and shock
loads. In addition, cast housings have a grease
fitting for relubrication, making them a good
choice for applications with somewhat higher
speeds.
Since, in many cases, several factors have
to be considered when selecting a suitable
Y-bearing unit, there is no way to provide a
list of general rules. However, important factors
that should be considered include:
• location on the shaft
• loads
• seals
• permissible operating temperatures
• speeds

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