Re: [CAD_CAM_EDM_DRO] Cool Worm Gear

Hi Alan,

The princple is the same as for any gear hobbing but, to do a normal spur
gear, you would have to set the blank up at an angle to the tap equal to the
pitch angle of the thread - not as easy as simply slipping the blank on a
vertical bolt.

The other problem with this is that, unless you use a specially made tap
(hob) the shape of the teeth will be wrong. It doesn't matter with a worm
and wheel like this because the teeth on the wheel and the worm have exactly
the same shape as they are derived from the same thread.

Ian
--
Ian W. Wright
Sheffield UK
www.iw63.freeserve.co.uk

----- Original Message -----
From: "Alan Marconett KM6VV" <KM6VV@...>
>
> Thanks for the uploads, I get the picture! Perhaps you have a pix of a
> gear being hobbed? Can regular gears be made this way also? I'm really
> not ready to by a set of gear hobbs. Maybe later.
>