Re: Struck Coin Blanks ???

On Thu, 28 Nov 2024 17:17:38 +0000, David Billington <djb@invalid.com>
wrote:

On 28/11/2024 16:00, Joe Gwinn 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:
>

[snip]

>
--
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.

>
The old-time answer to this is a Fly Press, which are still used.
>
Joe

>
I was going to suggest one also but as I understand it they're not that
common in the US, here in the UK they're quite common.

They are not uncommon here, and I see them turning up around old
industrial areas all the time.  They basically do not wear out.

I just checked eBay in the US, had 148 hits, some for presses, some
for press tooling.  Used machinery peddlers also list them, likely
with better prices than eBay.

     I have one and
use it from time to time to punch copper blanks for enamelling, I set-up
the tooling so I can quickly punch the blanks one after another from a
copper strip. For the coin stamping I was thinking of a drop stamp. An
image here <https://www.geograph.org.uk/photo/5757303> from the Birmingham
Jewellery Quarter Museum, formerly Smith and Pepper
<https://en.wikipedia.org/wiki/Smith_and_Pepper>. Having toured the
museum I didn't see those drop stamps, they're the small ones, but I saw
a large one maybe 15' (4.5m) high  and IIRC the side guides were railway
track but I can't find an image of it.

Those were the days.  If there were drop hammers, there would be drop
presses as well.

Joe Gwinn