Posted by Alan on May 04, 2007 at 19:43:42:
In Reply to: gear hobbing posted by selvakumar on April 27, 2007 at 08:24:38:
Differential gears in the gear hobbing process are required in order to generate the helix of a helical gear. In other words, you need to mount a specific set of differential gears to get a certain helix angle.
Differential gears are not required for spur gears or worm gears (in which plunge hobbing is used).
Regards,
Alan