Uses of Shoulder Bolts: A Comprehensive Guide

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Discussion Overview

The discussion focuses on the applications and functionalities of shoulder bolts, exploring specific use cases and comparing them to other types of fasteners, such as allen screws. Participants seek to understand the advantages of shoulder bolts in various mechanical contexts.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants propose that shoulder bolts are used in joints that need to carry significant shear loads.
  • Others suggest that shoulder bolts are suitable for applications requiring relative motion between parts, where one part has a slot and the other a tapped hole.
  • It is mentioned that shoulder bolts can serve as guides for springs, as their design prevents binding.
  • Some argue that clevis pins are typically a form of shoulder bolt.
  • Participants note that shoulder bolts can function as axles for mounting guide wheels or rotating arms.
  • There is a suggestion that shoulder bolts are used for mounting bearings to allow rotation.
  • One participant questions the use of an allen screw in a specific application, arguing that it would not effectively clamp a joint.
  • Another participant raises concerns about an unlabeled area adjacent to the shoulder in an image, questioning whether it is clearance or a bushing, and discusses the implications for load transfer and precise location.
  • There is speculation about whether the components in question are insulators, such as G10.

Areas of Agreement / Disagreement

Participants express various viewpoints on the applications of shoulder bolts, with no consensus reached on specific use cases or the comparison with allen screws. The discussion remains unresolved regarding the exact nature of the unlabeled area in the provided image.

Contextual Notes

Participants highlight the need for more context to fully understand the applications and functions of shoulder bolts, particularly in relation to the images shared. There are unresolved questions about load transfer and the design choices made in specific applications.

Who May Find This Useful

Individuals interested in mechanical engineering, fastener design, or applications involving relative motion in mechanical assemblies may find this discussion relevant.

araanandv2
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Hi,

Can you please explain where shoulder bolts are used?
Specific application?
 
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Here are a few applications that come to mind:

- A joint in which the bolts are required to carry a large portion of the shear loads.

- A joint that requires relative motion between the two parts. One part will have a slot while the other the tapped hole (the slot surrounds the shoulder section).

- Any time a part requires a spring, a shoulder bolt can be used as a guide. The absence of threads makes a nice guide that will not bind up the spring, i.e. stamping dies.

- Along the lines of the shear carrying, clevis pins are usually shoulder bolts.

- You can use a shoulder bolt as a kind of axle. Think of mounting guide wheels on a sliding drawer or a rotating arm.

- Mounting bearings so as to allow rotation.
 
Sholuder screw

Thank you.
I have attached an image.
Can you please explain why shoulder screw is used in this application?
why an allen screw is not used?
 

Attachments

  • Shoulder screw.jpg
    Shoulder screw.jpg
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It's impossible to tell you that without knowing the function of what it is you are showing us. I will tell you that an allen screw would not clamp any joint together. How would this joint maintain any kind of load with a set screw in it?
 
araanandv2 said:
Thank you.
I have attached an image.
Can you please explain why shoulder screw is used in this application?
why an allen screw is not used?

Is something missing here? There is an area adjacent to the shoulder which is unlabeled. Is that simply clearance (in which case it makes no sense), or is it a bushing of some kind? In either event, the washer is not doing much to transfer the load. Clearly no rotation is meant and, so, the whole purpose might be precise location. If that is the case, why not a reamed hole.

What is this thing?

Oh, wait a minute. Are these pieces insulators? Something like G10?
 

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