Posted by mark fenn on November 06, 2011 at 10:07:23:
In Reply to: Re: 2 to 1 ratio posted by tom on November 06, 2011 at 08:51:23:
thats ok i have a 3 mod hob is it too much to ask you to work it out using 3 mod and 30 degree helix regards mark sorry for being a pain