Message:

<p>[QUOTE=&quot;Conder101, post: 2769767, member: 66&quot;]They probably used two anvil dies.&nbsp; Anvil dies and hammer dies are not the same.&nbsp; Anvil dies have a longer neck so that after striking they rise and push the coin up out of the collar so the feed fingers could push it away.&nbsp; The hammer dies have a shorter neck so that when they retract there is clearance between them and the top of the collar so the feed fingers have room to slide the next planchet in place.</p><p><br /></p><p>When you use a hammer and an anvil die, at the bottom of the coining stroke the die faces are spaced properly for a proper strike on the coin. </p><p><br /></p><p>If you use two hammer dies, due the short necks, at the bottom of the stroke the die faces are further apart than they should be and a very weak strike would be the result.&nbsp; Also when the lower die rises up the coin will not rise above the surface of the collar and it can&#039;t be pushed away by the feed fingers.</p><p><br /></p><p>If you use two anvil dies their longer necks means that at the bottom of the stroke the die faces are closer together than they should be creating much greater pressure and a very sharp strike.&nbsp; However when the upper die retracts, due to the extra length there would not be the clearance needed for the fingers to push the coin away.&nbsp; (In fact when the lower die rises it might just trap the coin between the die faces again.)&nbsp; But since the collar is mounted on heavy springs, after a single cycle of the press it could be possible to force the collar down (instead of raising the lower die) and remove the coin.&nbsp; It would still require &quot;help&quot; on the part of the press operator.[/QUOTE]</p><p><br /></p>

Your name or email address:

Do you already have an account?

• No, create an account now.
• Yes, my password is:
• Forgot your password?

Stay logged in