There was an article in the March/April 2005 issue of The Home Shop MAchinst that showed how to do this. They used a 2 to 1 motor to table ratio. When I converted my 12" rotary table I used the same ratio. I used belt drive pulleys from a cam drive. The pulleys that I had even used a regular pitch belt. All I had to do was make a couple of flanges to keep the belt on the pulleys. I you go to a wrecking yard you can find a lot of different tooth pulleys depending on what kind of engine they are from.