Posted by Natarajan Viswanathan on February 09, 2001 at 09:34:03:
In Reply to: Re: undercut posted by Bill S. on October 29, 2000 at 14:05:53:
Re. the Undercut produced by a Shaper Vs. that produced by a hob, in the absence of any specific modifications (such as short leading of the hob, protuberance, tip radius , flats etc.) the shaper cutter tends to produce a higher start of undercut compared to the hob, because of the different generating action. See "Modern methods of Gear manufacture" by Nachi Machining Technology Company formerly National Broach & Machine Company.