In article ,
"Terry Keeley" tkee(no spam)@(or mail)rogers.com says...
Here's a good diagram of the different arrangemenats and their symbology:

http://www.nhbb.com/engineering/precision/preload.cfm


Except the OD marking on the figures on the right is
backwards from Gunner's convention. To my way of thinking
that OD marking is more consistent with the typical
representation of angular contact bearings in the middle
figures.

Ned Simmons