The SKF Y-bearing unit assortment is extensive.
It includes three designs with a choice of three
different materials for the housing and a variety
of Y-bearings that can be locked onto the shaft
in very different ways. Because of their design,
each Y-bearing unit exhibits characteristic
features that make it more or less suitable for
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 withstand
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: