Bill, I pulled out my indexer this evening and started looking at it. It's only got 24 holes in the front ring and does NOT have but one centered locating hole for the pin. Running the numbers it looks like it will to 15 degree increments only. I can see creating a plate that has holes every 10 degrees, but adding the top 10 hole ring may be more than I can figure out how to do the math on. I realize that the hole spacing would be X number of degrees off the closest adjacent hole to give you the required 1 degree increments but not sure what that spacing would be. With the fact that it has a fixed depth (it will not slide in and out) I am figuring that purchasing another one may be the route to take. I am also going to try to identify the rotary table I have and see if it had a plate kit for it to do gear cutting and the like. It's a horizontal table without an obvious method of mounting it upright. I Need to work on that and see if I can devise a proper and secure mounting system for it. I have two tables. One has a X and Y axis screw on it and the other is this heavy beast I spoke of. Of course figuring out a mount for a rotary indexing table is going to be more cost effective than buying one as this thing was probably a grand or better new. The spindex of course can be had for less than a 100 on ebay for the import ones so it's less cost effective to go through all the motions for it and still not have all the functionality that a new one would have.
Thank you for the information about your indexer. 15 degrees isn't bad at all. I remember marking the holes I need with a marker to speed up indexing. I remember using one a few times. I can't recall using a dividing head maybe once. I remember seeing some on here posting photos of their rotary tables modifications.
Have a good day