Bearing housings and bearing units are available in many different versions. They consist of a housing containing a deep groove ball bearing with a conical exterior. This allows them to be self-adjusting as some misalignment during assembly is possible.
They are extremely durable and depending on material they can even withstand impact loads. The most common materials are cast iron, steel and composite, but other materials are used as well. They are also available as separable bearing housings.