Tonnages used for striking numismatic versions of United States coins and medals vary between diameters and compositions

Pressures remain within safety boundaries
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Published : 04/21/14
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The maximum pressure exerted by presses used for striking numismatic versions of United States coins and medals at the Philadelphia Mint range from 59 metric tons per strike for the Lincoln cent to as much as 962 metric tons for a 3-inch medal.

The Philadelphia Mint has signs posted in the numismatic production area for coins from the cent through dollar; commemorative silver dollars; and bronze medals. Numismatic production reflects coins struck with a slightly better finish than that found on circulation quality coins. Medals may also have a special finish. The struck items may be sold separately or packaged in a set.

The signage indicates the minimum or "typical" striking pressure for each numismatic issues identified as well as the maximum striking tonnage to remain within safety limits. Included is the warning, "Maximum tonnages must not be exceeded under any circumstances due to potential personal injury and/or press or tooling damage."

Below are the latest striking tonnage parameters employed:

 

Maximum Numismatic Coinage Die Tonnages

 

Safety Limits

 

 

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