Hobbing a double helical gear.
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Previously:
https://www.homemadetools.net/forum/...732#post193933
https://www.homemadetools.net/forum/...011#post184017
https://www.homemadetools.net/forum/...310#post188630
https://www.homemadetools.net/forum/...405#post189008
https://www.homemadetools.net/forum/...191#post165376
https://www.homemadetools.net/forum/...458#post162192
