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I think I covered that...
>>Accuracy required is a function of intended use and length of thread engagement.
On 04/17/2018 11:33 PM, David Beierl dbeierl@... [SOUTHBENDLATHE] wrote:
I can cut external threads that accept a commercial nut with a calculated thread error of up to 6% for .7 to 3 mm pitch
I would think that "will accept the nut" is too loose a criterion, unless the application could be served by a single-turn nut. That would imply that you are willing to allow deformation of up to one whole thread-pitch under load before each of the few threads in the nut make contact.