Strong Magnetic Bottle Opener




About: We are a supplier of neodymium, rare earth magnets. We also love to conduct experiments with our magnets and build unique projects with them! We have several engineers on staff who are always thinking of new...

Magnets and beer...what could go wrong? This can be a great little project that will add a restaurant feel to your kitchen or workshop (wherever you prefer to have a cold one). The bottle opener will stick to any ferrous metal surface, like steel or iron, even a fridge door! The strong magnets can hold a lot of bottle caps, so you don't have to worry about having to clean it off often.

This can be a pretty simple project, depending on how intricate you make your design. The essentials for this project include:

-Wood of your choice

-Neodymium Magnets

-Bottle opener (a simple search on Amazon shows many different styles and colors).

Tools you may need: table saw, router, drill or drill press, chisel, screwdriver, and glue.

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Step 1: Choose Your Design

The first step in this project, as it is with most projects, is to choose your design. It can be as simple as a bottle opener and one magnet screwed to a 2x4, or you can make a nice piece with hidden magnets.

We tried out both options, but since we keep one of these on our fridge door, we wanted to make it look nice. Your design can really any size or shape you want, just keep in mind, the larger you go, the stronger (more expensive) magnets you'll need!

Our design is simple yet elegant (we think). For a fancier look, you can use different wood types, or chose a different bottle opener. We saw some with gold plating, chrome plating, specially designed, etc. There really is a lot of autonomy in this project!

If you are having trouble thinking of a design, we've included a simple drawing of ours!

Step 2: Cut Out Your Design

Sorry for not having pictures of this step, but it is pretty simple! Whatever design you choose, cut it out, router the edges, etc. Once your final design is cut, you are ready to insert the magnets.

Step 3: Insert the Magnets

This step is another designing process. We thought of two options that worked well. The first option is to chisel out a square in the back of the board for one large block magnet. We used a 2" x 1" x 1/2" block, our part number BY0X08. Using this large block, it will effectively hold the opener to the steel surface and catch the bottle caps.

The second option is to use countersunk magnets (we used four RC22CS-N) to hold the opener to the steel surface and two powerful DX08 to catch the bottle caps. This method is a bit easier to manufacture, since all you need is to drill some holes. Chiseling can be difficult!

The countersunk rings are simply screwed into the wood using a #8 flat-head screw. The large block magnet or the two discs are both epoxied into place. We used a strong two-part epoxy. Superglue could also work.

Whatever method you chose, leave minimal material between the catching magnet and the bottle caps. This will insure you catch many, many bottle caps! Our wood thickness over the magnet is 1/16". We also used a small strip of grippy tape on the back, which increased the friction enough to prevent any sliding on the slick fridge door.

Step 4: Additional Info

This really isn't a step in your process, but we wanted to share some prototyping results we found doing this project. See the first chart of different magnets catching bottle caps with 1/16" of wood over the magnet.

The second chart is what magnets we found worked well for the magnet on a 2x4 design.

Step 5: Attach the Bottle Opener

After inserting the magnets, it is now time to attach the bottle openers. All this takes is a drill and a screwdriver. If you want to put any finish on your wood, you should do it before attaching the bottle opener.

Drill a small pilot hole where the bottle opener screws will go. Make sure these holes don't hit the magnets! Then simply screw the bottle opener on and you are done!

Step 6: Testing


Now this wasn't a true step by step instructable, since we didn't show much of the manufacturing process, but we know you know that! Any questions, feel free to comment! Above all else...enjoy!! Please drink responsibly.

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11 Discussions


3 years ago

Can't you include specs in MM as well? Not all of us are Americans. We can of course convert, but it's more of a job. Thanks for the cool tutorial!


3 years ago

What type of drill bits did you use to drill the 3/4" and 1" holes?

A standard drill bit doesn't leave a flat hole, and a wood boring bit usually has some pilot that would end up drilling all the way through, particularly when placing the DX08 magnets 1/16" from the surface/


3 years ago on Step 6

So Very cool! Definitely on the to-do list! Great idea! Thanks for sharing!


3 years ago on Step 6

My next project - maybe even before making any food...

I think it is a great instructable. Most people on here can figure out how to make the base, or expand on it and make it better.


3 years ago on Introduction

Hobby shops like Michaels usually sell pre-cut and edge routed wood for plaques that should be about the right size for making these. Buying them will eliminate a lot of the work of making one of these neat items.


3 years ago on Introduction

I built one very similar but mine had a small box on the bottom to catch the caps.Although those rare earth magnets catch most of them.I will try to post some pics.


3 years ago on Introduction

Particularly like your post production testing and QA. lol

That aside, a great project with solid research - looks good as well - congrats!


Reply 3 years ago on Introduction

Nope! The screws are countersunk below the surface of the magnet and the magnet has a smooth, nickel plating. If you are worried about that happening, simply put a piece of tape over the magnets!