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17346Re: [multimachine] quality of threaded rod

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  • Chris Tofu
    Jun 24, 2013
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      On Mon, Jun 24, 2013 7:20 AM PDT Bruce Bellows wrote:

      >A precision class acme thread will have a tighter tolerance between the thread pitches.
      >For example 10tpi thread
      >2G class has a tolerance of .0095
      >3G class has a tolerance of .0044
      >2G class has a tolerance of .0032

      Wow, aren't those tolerances huge!? Would definitely need a lot more accuracy to produce a diffraction grating. 100,000 or more threads per inch.
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