One of my neighbors has a huge disk plow and has said I could have it... it was originally used as a "pull behind".... anyhow, to make the story shorter, the disk comes in two pieces and is connected by something similiar to what is shown in the picture.... The ball is affixed to the first section and the behind section is attached similiar to a bumper hitch... will have to inspect it closer next weekend...
Thank you all for the ideas. I will see if I can get some dimensions. Right now the part is at the farmers machinery museum, http://www.bcfma.com/ but I can go and take some other pictures. Maybe Dougster will have something next weekend.
Surken