Posted by Glenn on August 17, 2016 at 14:43:49:
In Reply to: Lead angle compensation when hobbing worm gears posted by Bob Mullin on August 17, 2016 at 10:33:06:
Subtract 2 hob addendums (gear dedendums) from hob OD to get hob PD. Calculate the new hob lead angle based on hob PD. We use a 5" sine bar set to the difference between the Worm LA and the Hob LA at the machine. Yes you need to increase the swivel angle.
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