Posted by Alan B. Metzel on June 12, 2008 at 14:35:45:
In Reply to: Re: hobber - single or double threaded worm? posted by BillS on April 11, 2008 at 12:13:03:
One caution, when using a multi-lead worm avoid using a multi-lead hob with the same (or integer multiple)number of leads. Tool and machine error compound, just as can happen in change gear setup.