Some time ago I read an article about making gear cutters on a lathe , using two pins a set distance apart I found a program on Marv Klutz's web site that works out the size and distances for the pins and the in feed , I made a couple and they worked , looking at them I thought that they could be made on a mill with a indexing head a lot easier using an end mill , the re-leaf angles are 15 degrees as I used a 24 hole dividing ring and they work just as well .