Profile shift of helical gear : discrepancy


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Posted by Peter ZUCH on December 03, 2009 at 15:48:20:

Hi!

I have a helical gear (z=34) and I took some measurements on it to find the profile shift x. However, I have some discrepancies now if I use different formulas. For instance, I have the formula relating the tip diameter to x and the formula relating the root diameter to x. And they do not give the same answer. I find once -0.16 and once -1.07! Why??? I doubt that I took wrong the measurements. Is there anything obvious why there could be a discrepancy?!

Thank you so much!


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