These dividing/indexing heads work quite well in the home shop.
I have used mine on both a 7" shaper and a knee mill with a 6x24" table.
However, when found, they often have no documentation with them.
The information posted here has been collected from a variety of sources.
If you need plates for your dividing head, contact me by e-mail.
I may have some available that will fit the Ellis, the L&W Chuck head, or a Bridgeport head.