Jack Wells

This thread is absolutely fantastic. Im looking for some help in finding out the correct sums for a M770.75 pitch thread. After using that great calculator - http://www.iso-gewinde.at/ Im still not getting it, Also no idea on how to find the thread tap value. Any help would be greatly appreciated. This is what i have incorrectly so far; <ThreadSize> <Size>77</Size> <Designation> <ThreadDesignation>M77x0.75</ThreadDesignation> <CTD>M77x0.75</CTD> <Pitch>0.75</Pitch> <Thread> <Gender>external</Gender> <Class>6g</Class> <MajorDia>76.908</MajorDia> <PitchDia>76.432</PitchDia> <MinorDia>475.9845</MinorDia> </Thread> <Thread> <Gender>internal</Gender> <Class>6H</Class> <MajorDia>77</MajorDia> <PitchDia>76.593</PitchDia> <MinorDia>76.283</MinorDia> <TapDrill>47.25</TapDrill> </Thread> <Thread> <Gender>external</Gender> <Class>4g6g</Class> <MajorDia>76.933</MajorDia> <PitchDia>76.4535</PitchDia> <MinorDia>76.506</MinorDia> </Thread> </Designation> </ThreadSize>