Half Dollar Blank & Planchet - Coin Community Forum

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Author	Replies: 4 / Views: 584
trdhrdr007 Pillar of the Community United States 2335 Posts	Posted 02/22/2023 4:47 pm I've got what's supposed to be a Type 1 & Type 2 half dollar blank/planchet. The photos show them side by side & then stacked to show they're clad.. When stacked the Type 2 is very slightly smaller in diameter. The Type1 weighs 12.11 grams and the Type 2 weighs 11.27 grams. My Red Book shows weight should be 11.34 grams. I'm assuming the Type 2 is close enough. The Type 1 blank is .77 grams overweight. Is that still within tolerance? Report this Post to the Staff

JimmyD Bedrock of the Community Canada 21640 Posts	Posted 02/22/2023 4:55 pm The tolerance for a half dollar is .26g so it is a 1/2 gram overweight, way too much. Also a Type 2 will be slightly small as it has been through the upsetting mill to form the rim. Report this Post to the Staff
Dearborn Moderator United States 97793 Posts	Posted 02/22/2023 4:58 pm OK, Jimmy pretty much got this one, I came to the same conclusion after a bit of research as well. Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 51/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents Report this Post to the Staff
trdhrdr007 Pillar of the Community United States 2335 Posts	Posted 02/23/2023 09:42 am The Type 2 is slightly smaller. It's obviously a clad blank of some sort. Does anyone have any idea what it might be? Report this Post to the Staff
coop Bedrock of the Community United States 62064 Posts	Posted 02/23/2023 1:08 pm On the first image, they are just backwards. You can see the Proto Rim on the one on the left: Type 1 Blanking process: Cutting the blanks Type 2 Setup process: Making the blanks into Planchets So the rim is formed by a reducing machine on the outer edge of the coin: Coins striking process: Coins struck Visuals help to see the processes. The Setup reduces the size of the blank and it becomes a planchet ready to be struck. When the coin is struck, it is smaller than the collar, and the obverse and reverse are pressed onto the coin, while the collar contains the strike and adds the plain edge/reed edge/year, EPU, year, mint on proof coins. (Business strike dollars add this in a separate step on this denomination) Thus the processes can vary, but all achieve the same goal. A struck coin from all three sides. of the coin. So with the smaller planchet, the forms into the coins we are used to seeing. (several per second) Report this Post to the Staff
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