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Re: Deeply puzzled by this Indian brock...

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  • Mike Diamond
    Coining presses are mechanical, not hydraulic. A hydraulic system would be too slow to strike hundreds of coins per minute. Hubbing presses are hydraulic,
    Message 1 of 2 , Sep 28, 2011
      Coining presses are mechanical, not hydraulic. A hydraulic system would be too slow to strike hundreds of coins per minute.

      Hubbing presses are hydraulic, however. Speed is not a consideration here.

      --- In errorcoininformationexchange@yahoogroups.com, innff@... wrote:
      >
      > Hydraulics are a funny thing. A system can go from one pressure to the next
      > in a matter of seconds if a relief valve goes into operation. While I
      > imagine that both scenarios do happen (change in die clearance and change in
      > hydraulic pressure), I would presume that the hydraulics would be more apt to
      > cause the weak strikes.
      >
      > Out of all the theories proposed, I do like the indent on the brockage
      > maker the best. It would explain how a single strike could make such a
      > complicated error
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