Re: Whole Depth & Minor Diameter


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Posted by Brian Dengel on October 25, 2000 at 10:18:55:


There are truths to both Bill S. & Brad's postings. The whole depth is, as Bill states, the result of the cutter's depth of cut required to get the correct over-pin measurement when the blank is OD turned to its' finished size prior to hobbing. The depth is specified on each hob based on the width of its' topland. In addition to the physical depth of the cutter, the whole depth is also dependent on the backlash designation.
For fine pitch gearing the whole depth as difined by AGMA is 2.2/NDP +0.002. For metric gearing, ISO/DIN/JIS standards, the whole depth is defined as 2.25*module with no tolerance.



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