Belleville Conical Washers - Overview | Fasteners 101

Belleville washers (also called Disc Springs, Spring Washers, Conical Washers, Cupped Spring Washers, or Conical Spring Washers) are used to add vibration resistance and preload to a bolt assembly. Plus they can be stacked in various ways to provide additional force and resistance to an assembly, and act as a lock washer as well.
The conical shape adds a spring force to against the bottom of a bolt head which gives it its locking properties. In this video, we further explore these belleville washers in a simple overview of how they work and how you can get the most out of them.
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[@jamescole3152]

Your load and deflection, has 2 together and 2 opposite. The 2 opposite will compress while the 2 together will not. So you will flatten the 2. It won't work very well if 2 are flattened.

[@kasperkerkhof2252]

The stack arrangement he uses is 2-1-1, which will have a greater stiffness, because (as you stated) you are only flattening 2 instead of 3 (but the same flat load) as a 1-1-1 stack arrangement. If you are looking for a greater flat load and a greater deflection you should use a 2-2-2 stack arrangement.

[@stefancockroft5370]

Nice but I don't know what load and deflection are so I'm confused.

[@anteneupitra]

you have to make a PhD in enginnering, and ask your teacher, here is mechanics, that knowhow to make things

[@sumithsanghavi-f1j]

HOW TO GET THE WASHERS FROM YOU, I REQUIRE M12 IN STAINLESS STEEL

[@musabtqeiwy1726]

Is conical spring washer a different name for spring washer? Or conical spring washer is a member of the spring washers family?

[@anteneupitra]

you have to make a PhD in enginnering, and ask your teacher, here is mechanics, that knowhow to make things

[@indiarocks6429]

We are making all types of High carbon spring action fasteners If you require any related item pls contact

[@StationaryNomad361]

So for deflection and load, you use 2x load. You can’t do 1x load, because it would just be a deflection configuration, correct?

[@michaelyoumans2113]

missing 1/2 of a video... What is load and how is it used? What is deflection and how is it used?

[@AlbanyCountyFasteners]

2:19 In this context, Deflection is the degree to which the washer travels vertically (or "bends"), with respect to the bolt, under a load. Think of it like how much the washer compresses or springs under load. A load is the force applied to the structural elements, sort like the "weight" that's on the fastener(s).

[@michaelyoumans2113]

Yes thank you for defining "load" and "deflection"... What is missing, from an Application standpoint is: Where would you use the "load"technique vs. the "deflection" technique, or the combination that you describe?? Thank you

[@AlbanyCountyFasteners]

Certain applications have specific requirements and the different configurations can be used to meet those requirements. If you have application specific questions, it's best to consult an engineer with your specifications.

[@formativeassessment4206]

Does this equal the separation of the joint which is being held together by the fastener?

[@arwinshrestha1531]

@@michaelyoumans2113 My understanding is that Load technique is used for instances where the amount of force applied onto the spring is the concern and the Deflection technique is for instances where the concern is how far you want the spring to deflect or move in the vertical direction. The combination allows for both.

[@StationaryNomad361]

Great content! Thank you

[@anonypersona3189]

When someone says "crown side" of the washer, which side do they mean? The concave side or convex?

[@AlbanyCountyFasteners]

That would be the convex side.

[@anonypersona3189]

@@AlbanyCountyFasteners Thanks. Someone told me there are two sides: "Crown" side and "Cup" side. It's obvious what the "cup" side is, so crown became self-explanatory.

[@fiorevitola880]

Is there different thickness of the conical washers?

[@AlbanyCountyFasteners]

Conical washer thicknesses vary from size to size. You can check out our spec table on the conical washers here: www.albanycountyfasteners.com/belleville-conical-washers-18-8-stainless-steel-p/111202.htm

[@aeroarby260]

Hi Bob, I was watching your videos on KZbin, especially related to Belleville washer, I’m making about 4000 pcs, but I need to do a deflection test @ 25%, 50%, 75%, and Flat. Do you have videos showing how to test Belleville washers, load V deflection? Can you advise any method to do the test, please? what type of apparatus or press do I need? Thank you, Sergio Sun Valley, CA

[@AlbanyCountyFasteners]

Our suppliers and manufacturers don't share that information with us, so the exact process of how they perform deflection tests is unclear. I would advise contacting an engineer on the subject for more specifics. That said, this article on Belleville Washer specifications and technical notes may help you: www.jugenheimersupplies.com/customer/docs/BELLEVILL%20WASHER%20TECHNICAL.pdf

[@aeroarby260]

thank you for the adivse

[@valvodka]

@@aeroarby260 I can get you deflection tests. we give them out all of time when people ask to compare similar disc springs. let me know what you are after