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Old June 13th, 2011, 00:42   #13
Reckless
 
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Join Date: Aug 2008
Location: Ladysmith BC
Quote:
Originally Posted by venture View Post
I just read some gear talk and I read that helical gears are quieter than straight gears in transmissions, so part of my theory could be wrong.

I can find quotes of people saying both. My thoughts in my previous post (more contact area) are why I believed the louder theory. I don't know what to think now?? ENGINEERS? PHYSICISTS?!? PLEASE WEIGH IN!
I think it also matter the company that machined the helical cut... I *beleive* that if the edges of the helicals are too 'sharp' they will be a little noisey till they 'wear in' ... where as they really high end helicals are softened on their edges (if that made any sense at all) part of the high pitch noise/whine of straight cuts are the super sharp edges
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