Quote Originally Posted by birchy View Post
Hmmmm, they're expensive. Maybe I should buy a dividing head (was gonna get one anyway) and make them myself? Where can I find specifications for such things?
They certainly are. I used a vertex 6" rotary table and put a stepper motor on it.

Can cut the pulleys quite quickly if you grind a form tool and hold it in boring head, or just make a quick holder as it's not exactly complicated. I've posted a thread with more about it somewhere, including a program I wrote to mill the pulleys. My pulleys are XL so in the end I just ground a trapezium of the right dimensions on the end of a piece of 5/16" HSS from the lathe.

5mm Pitch