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From: Bob La Londe <none@none.com99>
Newsgroups: rec.crafts.metalworking
Subject: Re: Struck Coin Blanks ???
Date: Thu, 28 Nov 2024 12:14:50 -0700
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On 11/27/2024 8:51 PM, Clare Snyder wrote:
> On Wed, 27 Nov 2024 16:33:48 -0700, Bob La Londe <none@none.com99>
> wrote:
> 
>> On 11/27/2024 4:17 PM, Clare Snyder wrote:
>>> On Wed, 27 Nov 2024 15:55:48 -0700, Bob La Londe <none@none.com99>
>>> wrote:
>>>
>>>> On 11/27/2024 3:29 PM, Joe Gwinn wrote:
>>>>> On Wed, 27 Nov 2024 13:57:58 -0700, Bob La Londe <none@none.com99>
>>>>> wrote:
>>>>>
>>>>>> Every since watching a woman dressed in pirate garb at a renaissance
>>>>>> fair (or faire if you prefer) place a blank in a set of dies and drop a
>>>>>> heavy weight on it to strike a souvenir coin I have had in the back of
>>>>>> my mind the idea to strike my own coins.  I can certainly make the dies.
>>>>>>     4140 is relatively easy to machine if you know how, and it will harden
>>>>>> "hard enough" for a low production number of from a few hundred to a
>>>>>> couple thousand coins.  I also keep a bit of O1 and W1 on hand for those
>>>>>> cutting tools I can't hand grind from HSS or carbide.  I even have a
>>>>>> propane forge in the back along with a toaster oven for tempering
>>>>>> (although it gets used more for powder coating).
>>>>>>
>>>>>> I started writing with two questions in mind.
>>>>>>
>>>>>> Where to buy/make coin blanks at the best price?  Not the 10-20 on Ebay
>>>>>> or Amazon, but a couple hundred to a couple thousand at a more
>>>>>> reasonable bulk price.
>>>>>
>>>>> Many country fair coins were made of soft aluminum.
>>>>>
>>>>> Maybe the brass sold for stamped dataplates or tags?
>>>>>
>>>>> .<https://identificationtags.com/product/brass-blank-round-tags-with-no-holes/>
>>>>>
>>>>
>>>> That's not a bad start.  Unfortunately they also sell end product which
>>>> usually means they don't sell for real wholesale pricing.  Its still a
>>>> good idea.
>>>>
>>>>
>>>>> Probably the alloy used for copper pennys can be got.
>>>>
>>>> Getting actual penny copper is not a horrible idea.  I could certainly
>>>> do some experiments by going through my change bowl and sorting out the
>>>> older real copper pennies to be restamped.  I suppose the zinc pennies
>>>> stamp okay, but they may not re-stamp okay.  My end goal is mostly for a
>>>> coin "about" the diameter and thickness of a regular classic silver
>>>> dollar.
>>>>
>>>> Casting copper from old pennies, motors, etc could also be an option,
>>>> but that would make it a whole different class of project.  A time and
>>>> money thing, and I don't mean the pennies.  Also, my little propane
>>>> forge probably isn't up to melting enough copper to be worth while.  Its
>>>> fine for one off heat treating projects, but probably not for casting
>>>> any quantity.
>>>>
>>>>
>>>>> Hobby stores may have coin-making supplies.
>>>>
>>>> Hmmmmm... I suppose its worth a look to see if Michael's (are they still
>>>> in business) or Hobby Lobby has anything.  At the very least I could
>>>> read the packaging if they do to see if that generates an other leads.
>>>>
>>>>> Early Chinese coins were lost-wax cast from bronze.
>>>>
>>>> I don't think casting is really the way I want to go.
>>>>
>>>>>
>>>>> Joe
>>>>
>>>>
>>>> -- 
>>>> Bob La Londe
>>>> CNC Molds N Stuff
>>>    Do your own "fineblanking" - stamp your blanks from aluminum, copper,
>>> or brass flat stock on a punch press.
>>
>> I design some punch dies years ago.  Hadn't even considered it for this.
>>   Its an option, but a big fancy punch press is probably out of my
>> budget.  I'll have to calculate the shear and see if it can be done with
>> one of my shop presses or perhaps an improvise drop weight press.
>>
>>
>> -- 
>> Bob La Londe
>> CNC Molds N Stuff

> Shop press will do it. Even a good arbour  press. Cycle time is slow
> doing onezies ---

I am aware that it will depend on die design.  I have a 6 ton arbor 
press, and I think I would be hesitant to think it would manage a fairly 
detailed die impression, but I have used it for lots of other things 
including punching round holes in thin sheet metal.  I've also got a 12 
ton and a 20 ton shop press.  Both are air over hydraulic, and actually 
quite slow.  In the field at the "faire" a drop hammer is used.  a 
relatively crude one.

"...a woman dressed in pirate garb at a renaissance fair (or faire if 
you prefer) place a blank in a set of dies and drop a heavy weight on it 
to strike a souvenir coin..."

I think if I follow through with this I'll stick with a drop hammer or a 
trip hammer until production required a faster process.





-- 
Bob La Londe
CNC Molds N Stuff

-- 
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