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25c 2012 Double Die

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Valued Member
Canada
219 Posts
 Posted 02/25/2015  11:50 am  Show Profile   Bookmark this reply Add numidan to your friends list Get a Link to this Reply
Thank you Rocky, I am happy to exchange with someone that has experience.

What was the maker of the H press? Schuler?

I have read that coining presses are usually a knuckle-joint bottom drive press. Was the H press of this kind?

Goto pages 75 and 76 of Schuler handbook
http://ftp.demec.ufpr.br/disciplina...LER/E-03.PDF

Are figures 3.3.2 and 3.3.3 what you were refering to in the above post?
Pillar of the Community
Canada
2784 Posts
 Posted 02/25/2015  7:40 pm  Show Profile   Bookmark this reply Add rocky to your friends list Get a Link to this Reply
oh thank you numidam . we pressed steel and copper and alumiun , with a 50 ton H press this was not for coins. I have worked with presses in my line of work all my career. the trade I worked in we get extensive training in pressing and hydraulic . the biggest steel object we ever jacked weighed 296 tons . we did that move with a group from Ontario and the united states. our 50ton H presses was for connections. our dies was made in Germany and I have seen them break when that happens they almost explode made of tungen carbide thank you so much
Valued Member
Canada
219 Posts
 Posted 02/27/2015  3:16 pm  Show Profile   Bookmark this reply Add numidan to your friends list Get a Link to this Reply
Just discovered the maker of the "hobbing press". They are Sack-Kiesselback.

Here is the product sheet:
http://www.sack-kiesselbach.de/en/p...g-press.html

Here is the reference list showing Royal Canadian Mint as a customer.
http://www.sack-kiesselbach.de/file...nce_2015.pdf

Interesting to see what is found under technical data and miscellaneous sections!
http://www.sack-kiesselbach.de/file...tt_EP_EN.pdf
Pillar of the Community
Canada
2784 Posts
 Posted 02/27/2015  8:29 pm  Show Profile   Bookmark this reply Add rocky to your friends list Get a Link to this Reply
thank you for sharing. we have used a press similar to this. the press we used was to connect metals lenghts and bend them our dies are 3 inches wide. finish press metal is down to 2 inches. you would not believe what a drop of grease or hydraulic fluid can do to a solid piece of metal. in one of these presses. it will cut ruts deep into the metal like a knife in butter . numidam question I have found a 1976 nickel dollar. missing the island . I read the Canadian coin listing. there is nothing on that coin . but I have found out that the dies used in the earlier year 1968- 1972 with some variations was used to strike those coins. so the year 1976 would line up like 1968 .island -no island -little island . these comments are in the Canadian catalogue . the one I have is dated 2012. do you know if the is a listing for a 1976 nickle dollar with a missing island your help would be appreciated have a great one
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