Posted by Bill S on March 28, 2005 at 13:26:09:
In Reply to: Re: Index and feed problem posted by mkk on March 26, 2005 at 04:56:56:
The charts found on gear hobbing machines are for spur gearing, or for helicals where the machine has a differential. For hobbing machines without a differential the index and feed gears must be selected as a matched set of ratios to generate the desired helix angle.