Optimizing Movable Joint Parts for Slider Crank Mechanisms

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SUMMARY

This discussion focuses on optimizing movable joint parts for slider crank mechanisms, specifically addressing the types of bolts and nuts suitable for constructing these joints. The recommended components include shoulder bolts, which are hardened and ground to precise tolerances, and nylon lock nuts for initial assembly. For enhanced security under heavy loads, alternatives such as castle nuts with cotter pins or stover nuts are suggested. The conversation emphasizes the importance of selecting the right fasteners to ensure stability and durability in mechanical applications.

PREREQUISITES
  • Understanding of slider crank mechanisms
  • Familiarity with fasteners, specifically shoulder bolts and nylon lock nuts
  • Knowledge of mechanical load considerations
  • Basic principles of mechanical assembly and joint design
NEXT STEPS
  • Research the specifications and applications of shoulder bolts
  • Learn about the use of castle nuts and cotter pins in mechanical assemblies
  • Explore the properties and benefits of stover nuts for high-vibration environments
  • Investigate alternative joint designs for slider crank mechanisms
USEFUL FOR

Mechanical engineers, hobbyists building robotic arms, and anyone involved in designing or optimizing slider crank mechanisms will benefit from this discussion.

Guest312
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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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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.
 
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Rx7man said:
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.

Excellent, thanks for help Rx7. Much appreciated.
 

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