TellsItLikeItIs said:In what situation might a non-standard pin be a compromise? Off hand I can't think of one.
Sorry, I said that standardized components may be a compromise in some situations. I know there have been situations in machines that I design and build where I wish I had an 'in between' thread, although mostly with respect to the major or minor diameter, not the pitch.
Metal lathes have been used to cut threads ever since Maudsley, and if you can cut threads then creating a tap is a relatively small step, especially if the tap is to be used for an easy-to-cut material like wood. Tapping stainless, titanium, and other tough-to-cut materials are another story. Of course the value in doing this may not be there for a $50 repair. But it can be done if one is motivated.
I tend to agree that the difference between a pitch of 11tpi, 11.5tpi, and 12tpi should be pretty minimal. The difference in thread width on these pitches is only about 0.004" (11 to 11.5, or 11.5 to 12 .... from 11 to 12tpi is about 0.008" ) ! I can see the ~40 thou difference in major diameter having some effect on the collar as it is a more significant difference.
Of course I know more about threads than I do about playing pool and cues, so take all this with a grain of salt.
Dave
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