Instructables

Step 1: Mark The Center

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Center the coin in the carpenters square. Using a razor blade score a line in the center. Rotate the coin 90 degrees and score another line. Where the lines cross is the center. Now use a punch to mark the center. This helps you in the next step

Step 2: Clamp And Drill

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Clamp the ring. Drill through the premarked center. You can progressively drill a bigger hole until it will fit on the mandrel your using. Or, you can just use a 3/8 spade bit like did. I used a pry bar as the mandrel.

Step 3: Hammer

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Place a large hammer on a flat surface to serve as an anvil. Next, place the coin over the mandrel. Using a small hammer, hammer the edge of the coin at a 45 degree angle.

As you hammer rotate the mandrel and apply slight pressure towards the anvil. The ring will form a cone shape. Continue to hammer until the cone forms a cylindrical ring.

Once you have the ring shape you can continue to hammer causing the ring to expand in diameter. This is where you check it against the finger measurement it's being made for.

Important. As yor move the ring up the mandrel, flip it around. This helps to make the cone a cylinder.

Step 4: Mount The Ring

Find a socket bit just barely smaller then the ring. If you can't find a socket that's just right you can use a smaller socket and use something to wedge between the ring and socket. I use parachord when I need to.

After you press the ring on the socket, use a nut and bolt and secure it through the female end. The protruding end of the bolt will be used for mounting in the drill press.

Place a smaller coin under the socket while you tap the ring on. This leaves an even spacing to true the edges up.

Mount the assembly in the drill press and spin it round. You will shape the bottom side first.


 

Step 5: Shape

With the assembly spinning in the drill press, use progressively finner sand paper to make the ring it's final shape. I start with 80 grit, then 400, then 2000.

Spray the 400 and 2000 grit sand paper with water. This prevents the sand paper from getting clogged with metal particles. Again, this gets HOT! And don't breath the metal dust.

Flip the ring as needed. Use polishing compound to buff it to a shine. Now that the outside is nice, time for the inside.

Be careful not to mar the ring. Use the wood clamp to remove the ring from the socket. Flip the ring over and press it back onto the socket. Make sure you use a soft work surface when you hammer the ring on and off. I used the clamp it self.
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DMANTHEROCK1 month ago
i know you have a metal lathe. If you can work it at all like a wood lathe, you. an turn a slightly tapering piece of wood a good foot long that at the smallest is like a size 4 ring and at the largest close to a 15. This becomes your new mandrel. if you have trouble with the ring slipping you can put some tape where it fits, then slide the ri g over the tape for a tight fit. that's how i sand the wooden rings i make.
AronC08163 years ago
This is really cool! I want to try making one but I am worried that my lack of patients will have me turning out with a less than satisfactory product. What are modern nickels made of? I figured they were some kind of alloy.
Mrballeng (author)  AronC08163 years ago
I think they are an alloy of nickel and copper.
they're made of a nickel copper alloy, thats true. ive noticed that it turns my finger green as the copper oxidizes. is there any way to prevent that? i was thinking maybe covering the inside part with solder then polishing it again. would that work?
Hi,
You could try using the sacajawea dollar coin.
It "looks" golden, but the gold is is only on the outside, which you sand off. I read the inside is a higher grade of copper/nickle alloy (90/10) and should resist tarnishing better.
Sounds almost opposite, being 90% copper, that it should tarnish less, but I think the higher copper content makes it more durable.

On guns, you put "gunstock oil" on the barrel, which you could try here. Or you could use boiled linseed oil, and wait until it hardens and gets very dry. This won't last forever, but it is what gets put on steel gun barrels to protect the blue/black, so it could work well.
If you have clear nail polish it should prevent greening from happening!
Little late on the ball here, but for the best results try to find silver quarters, they were 90% pure up to 1964 for the US... uhh, Canada is a wee bit more complicated see the following chart [http://en.wikipedia.org/wiki/Quarter_(Canadian_coin)]
Silver is soft and easier to work with, also doesn't leave marks on the skin.
Soda7751 year ago
I made one like this using a pre-64 quarter. I messed it up a bit at first, because I was stupid, but I managed to salvage it, and it turned out pretty nicely. I'm definitely going to try again soon!
sparktech1 year ago
I would like to make one for myself that is made from a pre 1964 quarter...should I drill a smaller hole and then form it into a cone? I am worried that If i drill a large hole and then hammer it it will be too large for my finger
stroker-ms1 year ago
This was great!! I just read this like 3 hours ago! and Have a Really Cool Ring....going to make another one!! This was a great instructables with great instructions!
tycrump2 years ago
it actually broke while i was working on it. i can try to make it again and see how it turns out
Mrballeng (author) 2 years ago
Could you post a picture? I'd be a better help if I could see how your ring looks at this point.
tycrump2 years ago
I tried making this and it worked up to this point. when i started hammering, it became a thin circle. how did you get it to be that conical?
chockenbury2 years ago
Found the exact answer from the US MINT WEB SITE
http://www.usmint.gov/consumer/?action=FAQ

Can I make jewelry from U.S. coins?
Yes, but your business should be careful not to imply any endorsement by or association with the United States Mint in its advertising and marketing materials

Can I melt, drill holes through, or mutilate U.S. coins?
Maybe. It is a violation of 18 U.S.C. § 331 to alter a U.S. or foreign coin with the intent to defraud. The United States Mint cannot issue interpretations of criminal statutes such as this, which fall within the jurisdiction of the U.S. Department of Justice. Furthermore, 31 C.F.R. Part 82 states that no person shall export, melt or treat any 5-cent coin or one-cent coin of the United States. HOWEVER, there are a few exceptions such as for novelty, amusement, educational, jewelry and similar purposes. Your business should consult with an attorney to ensure it does not run afoul of these laws before melting or mutilating U.S. coins.
MicioGatta2 years ago
I love your instructables, not easy but beautiful. Can you tell if one can do something like this with useless 1 & 2 euro cent? I hate them ;-P ;) Bye!
builderkidj2 years ago
Nice headcrab killah :)
htonks3 years ago
I'm going for a thinner, woman size 5 1?2 around ring. Do you recommend your cone shape hammering, or just hammer it head on ( the edge) so it stays the same shape just gets thinner and wider?
Mrballeng (author)  htonks3 years ago
Go the "on the edge" route. It's eaisier to shape and polish this style into the ring your looking for.
Thanks! Will this still come out a little but wide, but just not as wide as the mens?
Mrballeng (author)  htonks3 years ago
Yes. Play around with it. You'll find out real quick how to get the thickness you want.
htonks3 years ago
So does banging it into a cylinder work better than just banging it it right on the edge while on the mandrel?
Mrballeng (author)  htonks3 years ago
I wouldn't call either method better, though it is eaisier to hammer it on edge while it's on the the madrel.
ddbear3 years ago
Where can I get a bit like that? I used one I had lying around, and destroyed the tip on it! Is it a special bit made for metal?
Mrballeng (author)  ddbear3 years ago
This bit is actually for wood. I used a low rmp setting on my drill press and it did well. But I think regular drill bits would work better. You can buy this type of bit at the home depot.
Asmodeous3 years ago
Will a nickel be able to accommodate a large finger width, like a size 12? if not, what coin would? Thanks!
Mrballeng (author)  Asmodeous3 years ago
Yes, the ring would just be thiner.
phoenix1243 years ago
how do you control the sizing of it?
Mrballeng (author)  phoenix1243 years ago
oh wow, thank you! i'll post pics as soon as i get done :)
Skip3 years ago
This type of technique is called coning and converting. Wedding ring manufacturers use a similar technique to make seamless rings which go into a CNC lathe to be shaped. I know this because it is my job.

Great to see it can be done "by hand" as it were.

By machine, "washers" are stamped out of strips of metal. They are then pressed in the middle (coning) with a hydraulic press, creating a cone, then they are pressed through a polished hole (converting) which turns the washer into a short round tube which is called a slug.
The slug is then put into a press roller which rolls the ring with a steel mandrel in the middle against a nylon press. This expands the ring ready for the CNC lathe.

The only thing I'd warn against with using coins as rings is the high Nickel content of the coins (search "cupronickel") , but for the majority of people, this is a great thing to do.
Is cupronickel dangerous? I looked it up, but nothing stands out for me as dangerous (or that I missed something)
Some people have nickel allergies
Modern nickels are minted of 75% Copper 25% Nickel alloy <---

Its probably safe to say that most of the users here are aware of what hazards they may encounter when performing an 'ible, and that those with a nickel allergy would realize the risks involved with utilizing a coin as a material that is commonly referred to as a "nickel". My five cents.
When are the best years to use, metal wise?
Mrballeng (author)  brandon.horrell3 years ago
As far as nickels go, I just use whatever is on hand. Most of the ones I've used are from after 1980.
swede7son3 years ago
Another excellent i'ble Mr B! After making one of your teardrop pendants for my wife yesterday, I had the urge to go back out to the shop and try making one of your nickel men's ring for myself. It took longer to grind a mandrel out of an old steel shaft than to make the ring. I did things a little bit different than you instructed but got it done anyway. I chose to leave most of my tool markings on the surface of the ring to show that it's handmade. I like the hammered look. Sorry for the crappy iPhone picture.
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Mrballeng (author)  swede7son3 years ago
This is great! I really enjoy when others post pictures of their work. Thanks for the comment.

And if you have any project ideas for me let me know. I'll gladly make the i'ble.
Mrballeng (author) 3 years ago
Why yes it is. I was trying this same process on the outer part of a $2 peso coin but it didn't work out. Maybe after some more practice.
joreknight3 years ago
is that the centre of a peso coin?
Dr. Pepper3 years ago
Just awesome!
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