i take a helical gear in toolbox of solidwork 2012:
[url=http://upanh.com/view/?id=arta6e9baxw][img]http://nw8.upanh.com/b4.s38.d2/3ad2cfdbe052a65cd857febdd1ddfcc7_55158818.helicalgear.jpg[/img][/url]
I choose Helix angle with many value defferent, Outside diamater (da) of helical gear will change...
With: helix angle=5 (Z47,m6), da=294mm
With: helix angle=25 (Z47,m6), da>400mm
Why did it happen so?
