Posted by Drew on February 14, 2011 at 16:01:09:
In Reply to: Re: slot on hobbing posted by BillS on February 12, 2011 at 13:45:27:
I knew I had seen that picture before and it took me a few tries to find the book that I saw it in, but I did find the photo. That picture is of an elongated-tooth single position hob. The info I have only covers how to set the hob in position to the part. From reading the section it appears that the hobs are specifically made for each part by Barber Colman (I can't tell you when this book was printed).