Posted by bdriven on February 26, 2007 at 05:53:57:
In Reply to: Re: Helical bevel gears posted by D.Bag on February 14, 2007 at 10:43:05:
Helical bevel gears seem to be rare because of the oblique tooth form. Like hypoids due to the offset or non-intersecting axes the gear form must be calulated. This means that tooth profile and contact patterns would be generated for the special application. The climax logging locomotive had this type of gearing early on but in later years I believe used hypoid gearing. The teeth are oblique and or asymetrical due to the interference with its profile due to its offset in axes, face width and ratio thus making them hard to produce.
I have formulas for this type of gear but this requires that cutters be made for the left and right flanks and be rotary cut with a dividing head.
Not too familier with a NO.12 Gleason on how it would generate the oblique tooth form when it rolls threw its generating path...
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