PART VI. Striking Errors:

Abnormally Strong Strike:

Extremely Large Broadstrike:

Definition: Enormous broadstrikes owe their existence to several concurrent press malfunctions.  The first malfunction is the failure for the collar to deploy.  Instead of surrounding the planchet when the latter is struck, the top of the collar sits even with or below the anvil die face.  The second malfunction is the presence of abnormally high ram pressure and/or an abnormally small minimum die clearance. Ram pressure refers to the tonnage applied to a planchet of normal thickness.  Minimum die clearance refers to the minimum distance between the two dies in the absence of a planchet.

Any planchet struck in these circumstances will be free to expand in all directions.  Expansion is commensurate with the amount of ram pressure applied and the length of the hammer die’s down-stroke.