Not being a mechanic I struggle with some of the understanding sometimes.
Bearings can be a very confusing subject for what is really quite a simple subject (or are they ??)
I found this explanation of bearing types, properties and what all those type numbers mean.
[
www.gizmology.net]
For detailed specs you really need to look at each manufacturers data but this may help you make sense of the mechanical bearingese that is often spoken.
cheers
aka47
Necessity hopefully becomes the absentee parent of successfully invented children.
