Re: Helical Gear Problem


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Posted by Ron V on February 03, 2006 at 19:53:12:

In Reply to: Re: Helical Gear Problem posted by Ron V on February 01, 2006 at 21:38:05:

Just to clarify a point I made in my last post Operating P.C.D.s can only be used to calculate center distance for spurs and helicals if the amount of correction given to one member is equally inverse to the amount given to the other, eg. +0.50 and -0.50. If the corrections are not equally inverse to each other then centers can only be calculated from tooth thicknesses and the difference between the operating pressure angles. I was caught out once without this knowledge. Nearly got me into a heap of trouble.


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