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Modern Coin Poor Strike Quality.
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<p>[QUOTE="Conder101, post: 4959989, member: 66"]<b>The mint makes billions of pennies every year so all coins have to be made on very high speed presses. The dies move so fast they simply don't have the time to bring up higher relief.</b></p><p><br /></p><p>This. Back when the coins had higher relief the presses ran at between 30 to 8 cycles per minute. Call it an average of one coin per second. (actual striking time about .13 seconds) Now when the planchets are struck the metal doesn't flow into the recesses of the die instantaneously, it takes a certain amount of time. But today with the horizontal striking presses they are running at 750 cycles per minute or 13 coins per second. The metal just can't flow very far in the .01 seconds of the actual striking portion of the cycle, so the relief has to be greatly lowered to allow the dies to fill in that brief flash of time.[/QUOTE]</p><p><br /></p>
[QUOTE="Conder101, post: 4959989, member: 66"][B]The mint makes billions of pennies every year so all coins have to be made on very high speed presses. The dies move so fast they simply don't have the time to bring up higher relief.[/B] [B][/B] This. Back when the coins had higher relief the presses ran at between 30 to 8 cycles per minute. Call it an average of one coin per second. (actual striking time about .13 seconds) Now when the planchets are struck the metal doesn't flow into the recesses of the die instantaneously, it takes a certain amount of time. But today with the horizontal striking presses they are running at 750 cycles per minute or 13 coins per second. The metal just can't flow very far in the .01 seconds of the actual striking portion of the cycle, so the relief has to be greatly lowered to allow the dies to fill in that brief flash of time.[/QUOTE]
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Modern Coin Poor Strike Quality.
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