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Help with movable joint parts

  1. Feb 7, 2016 #1
    I want to make a simple slider crank mechanism. I don't know what type of bolts or whatever is used for movable arms. I've heard online so far that using a carage bolt and nylon lock nut will work, but I bet there's probably other ways to make a movable joint. Something more secure. I'm sure they don't use Nylon lock nuts with carriage bolts with robotic arms. I want to make a shaker. It's not for school if you can clearly see by my DOB, and profile image.

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  2. jcsd
  3. Feb 7, 2016 #2
    you might want to look into "Shoulder bolts" to start with.. they're hardened and ground to precise tolerances
    https://www.google.ca/search?q=shoulder+bolt&ie=utf-8&oe=utf-8&gws_rd=cr&ei=mYi3VtiZFcrKjwPsibSgAw

    otherwise, depending on if you're doubling up some of the arms, you can use a sleeve over a carriage bolt with washers on each side.. for nuts, Nylon locking nuts are a good start, but perhaps castle nuts with cotter pins or 'stover nuts' which are specifically designed for heavy shock and vibration loads.
     
  4. Feb 7, 2016 #3
    Excellent, thanks for help Rx7. Much appreciated.
     
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