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Recent content by Rsk2mc

  1. Rsk2mc

    Breakaway Bolt Design

    Thanks for the link, unfortunately the bolt we are using is a custom fastener for a project.
  2. Rsk2mc

    Breakaway Bolt Design

    i have tested 12 bolts in the lab. Two different sizes, the M10 broke at 32.5 ft-lbs, using the above formula i calculated them to break at 31. The m12 bolts broke at 30 and i calculated 33. I think the formula is pretty good estimation to design the bolt then verify with testing. rb1957 is...
  3. Rsk2mc

    Breakaway Bolt Design

    I have used the equation for torsional shafts tau = T*R/J and calculated a value that is almost spot on to the tested value. I have tried 3 different bolts and solved for T in the equation and this seems to give me a very close approximated value.
  4. Rsk2mc

    Breakaway Bolt Design

    I am currently working on a breakaway Bolt Design. Ideally the first head of the bolt will break off at 45 ft-lbs. How can I calculate when the head will break off, assuming I know the neck down diameter that will break.
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