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What is the shear force rating for the button-locking pins?

Question:

Top panel would be about 15mm.

Bottom would be a block about 20mm thick with 4 receiving holes for your fastener.

Both would be circular plates with a diameter of 155mm.

I’ve provided a sketch of the proposed use case for clarification.

Answer:

Preload is the spring force = 30N

https://www.spanclamps.com/scblpp0610-s

if you put a higher force, then the panels will start to separate

so crucial will be to have a higher clamping force.

A much better product with higher clamping force is:

https://www.spanclamps.com/SCQTHD0620     400N

https://www.spanclamps.com/SCQAPSCHS2820T            1800N   (hower is not made in stainless steel, and A286 is a special used stainless steel for the aerospace industry.

 

It all can be done, but then you’ll have a very high cost

The weight of your panel will also determine what the side loads = shear strength will need to be.

This is also mentioned in the catalog.

 

If you now hold this circular plate together with screws, the screws will clamp the panel very stiff, dependent on how much torque you applied during installation.

 

You mention that you have a pressure of 1100 Mpa which converts to 1100 Newton/mm²

The question is how many is the tension load in Newtons! That will be applied to our fastener.

 

We would also consult to mount our fasteners in a countersunk hole, so they fit.

 

Otherways, we have a fastener that does have high clamping forces, in case  your panels are designed, so that the fastener is to the close end, so the fixation is tight fit.

You’ll have to integrate then some kind of guiding pins, in order to cope with the side load (Turnlocks cannot take side loads)

My suggestion would be to use:

35mm

HHSTLHS-45S

(this is good for the range of 34.4-35.2mm)

I would make it so that that your panels measure exactly 35.15mm, so you have a high clamping force

https://www.turnlock.eu/hhstlhs-45s + https://www.turnlock.eu/HHSRF41S

 

the stud itself could be made in A286 too, however the Belleville washers, will be in standard stainless steel, and the receptacle too!

Quantities here again determine the possibility of making them in A286, if you talk about 500 pieces it should be doable, if it’s only for just a few, then you’ll have to go for the standard stainless steel.

 

If your application has normal heat I would go for standard stainless steel as alloy A286 is a very high corrosive resistant and heat resistant material.