New Zealand Gold Prospecting & Metal Detecting Forums Archive

 

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Mudwiggle  
Posted : Monday, 21 September 2015 6:28:47 PM(UTC)
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Had this 1951 penny sitting on my keyboard at work for many weeks and today I finally spent my lunch trying out this coin ring lark.

Very wobbly on the perfectly circular front, and a bit XOS on the sizing probably due to excessive tappity tapping with the handle of a Stanley screwdriver, but I'm more than happy with the first hack.

Might try an old 20c next to see if that gives a better (wearable) size.

Then I might source a proper mandrel rather than use the spikes on the surveying tripod....
Mudwiggle attached the following image(s):
first coinring.jpg
1864hatter  
Posted : Monday, 21 September 2015 9:19:47 PM(UTC)
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Excellent result. I can't work out how you made that. I might have to look into making one myself. I have detected a half penny coin ring once
And now....On sandy beaches and muddy soil, rings and coins await my coil!
Iggyrulz  
Posted : Monday, 21 September 2015 11:01:58 PM(UTC)
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Nice job especially for a first attempt, I'm still waiting on mine to be made by a local legend.....which reminds me, I must give him a call. He has talked me through the process but still slightly confused, from memory UK Shillings were good.I'm thinking Sov's would be nice and malleable.

Edited by user Monday, 21 September 2015 11:02:51 PM(UTC)  | Reason: Typo

creamer  
Posted : Tuesday, 22 September 2015 8:57:54 AM(UTC)
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Choice. So you must drill a hole in it first then.

.
Garrett Ace 350
Xpointer



www.nzfossickers.co.nz
Mudwiggle  
Posted : Tuesday, 22 September 2015 2:39:46 PM(UTC)
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Yep, whack a hole in the middle, then use a ball bearing and collar to 'roll' it inside out.

Brass vending tokens however are much more difficult.
This was straight after annealing too, as in first working post anneal.

I'll stick to copper and silver in future.

If anyone is going to give it a go (not difficult) there's some good oil on annealing different metals here: Annealing Temps of common metals

MW

Edited by user Tuesday, 22 September 2015 3:55:16 PM(UTC)  | Reason: Added link

Mudwiggle attached the following image(s):
PingRing.jpg
FossickFester  
Posted : Wednesday, 23 September 2015 5:23:09 PM(UTC)
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Good Job on ya ring mudwiggle, I'll post pics of my ones that I make and sell when I can find my frickin' mini usb cable and figure out how to post pics on this site (never done it before). Having a steel mandrel (definitly not an aluminium one!) makes the process easier. The two tricks that I've learnt while making mine is to be patient (really patient) and light taps with the hammer. It takes me approx 6 hours per ring.

And before anyone asks if it is illegal to intentionally damage NZ currency and then sell the changed currency as jewellery, not it is not. It is perfectly legal as the item sold is no longer currency but jewellery. The act that made it illegal to intentionally damage currency has been repealed.

Hi to all my fellow fossickers, it's been a while since I last posted. :)
Mudwiggle  
Posted : Wednesday, 23 September 2015 8:18:25 PM(UTC)
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Cheers Fester,

I must have been lucky, the penny ring only took 45 minutes... Mind you, I jiggered the brass token in less than half that. :)

Did you source the mandrel locally, or imported? I can only find US listed ones
FossickFester  
Posted : Wednesday, 23 September 2015 9:16:24 PM(UTC)
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I got the mandrel locally from these guys:

https://secure.zeald.com...s/results.html?q=mandrel

Warburtons is a good site. I found them through another paydirt members recommendation on another blog. A couple of the reasons my rings take so long is i'm using very limited gear and I produce a slightly different result (you'll see when I actually post the pics, again if I can find that blasted cable). Also I make mine from 1 and 2 dollar coins, Being that their bronze alloy, their a liitle bit harder metal than say copper to shape, so takes a bit longer to hammer out.
Mudwiggle  
Posted : Thursday, 24 September 2015 7:17:20 AM(UTC)
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Originally Posted by: FossickFester Go to Quoted Post
I got the mandrel locally from these guys:

https://secure.zeald.com...s/results.html?q=mandrel


Perfick.
Thanks mate.

c4bb0ose  
Posted : Thursday, 24 September 2015 11:51:06 PM(UTC)
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If we are talking about coin rings here are some I have made, I use a rather different method compared to what you are using :P





I use a long bolt secured between a C shaped piece of metal, I drill out a hole the size of the bolt and then anneal the coin. I then tap it with a hammer and keep moving it around in circles until it is the desired size. Once I get a bit more cash I will look at getting a small jewlers anvil which will make things easier.