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Weight Variations

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 Posted 01/22/2016  09:30 am Show Profile   Bookmark this topic Add Hnry to your friends list Get a Link to this Message
Percentage wise, what is a reasonable weight variation among like coins?
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 Posted 01/22/2016  10:14 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
Do you mean Mint tolerances?
John1
( I'm no pro, it's just my humble opinion )
Searched 6.5 +/- Million Cents Since 1971
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 Posted 01/22/2016  4:04 pm  Show Profile   Bookmark this reply Add bpoc1 to your friends list Get a Link to this Reply
Hnry,
John, is there a site that shows Mint tolerances?
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 Posted 01/22/2016  4:46 pm  Show Profile   Bookmark this reply Add Hnry to your friends list Get a Link to this Reply
hi John1 - yes - mint tolerances...

it may not be public data?...

the QA process must address weight as well as composition ratios...

frequently when coins are described, the weight is provided to milligrams...
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 Posted 01/22/2016  4:57 pm  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
I don't know of a site but for cents it is .13grams
John1
( I'm no pro, it's just my humble opinion )
Searched 6.5 +/- Million Cents Since 1971
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 Posted 01/22/2016  5:24 pm  Show Profile   Bookmark this reply Add amida17 to your friends list Get a Link to this Reply

Quote:
Small cent 1856 - 1971 was 2 grains or +/- .13 grams
Small cent 1972 - 1982 was 1.9 grains +/- .12 grams
nickels 1855 - date 3 grains +/- .19 grams
dimes 1.5 grains +/- .09 grams

quarters 3 grains +/- .19 grames (notice it is geting stricter. Weight of coin up 2.5 times, tolerance up only 2 times)

Halves 4 grains +/- .26 grams (weight up 100% tolerance up 33%)

silver dollar 6 grains +/- .39 grams (weight up 100% tolerance up 50% compared to the dime the weight is up ten times, tolerance up four times.)

Ike dollar 40% or clad 8 grains +/- .52 grams This is the only clad coin not held to the same standard as the silver versions.

Gold coins were held to much stricter tolerances especially as the weight increased.

gold dollar .25 grains +/- .02 grams

quarter eagle .25 grains +/- .02 grams weight up 150% tolerance up 0%

three dollar .25 grains +/- .02 grams still 0% increase in tolerance

half eagle .25 grains +/- .02 grams still 0% increase in tolerance

eagle .5 grains +/- .04 grains ten times the weight of the gold dollar with only a doubling of the tolerance allowance.

Double eagles .5 grains +/- .04 grams Weight doubled again with no increase in tolerance.


-Conder101 from here http://www.coinpeople.com/index.php...coin-weight/
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 Posted 01/22/2016  6:22 pm  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
amida17,
Where did you get that info?
John1
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 Posted 01/22/2016  7:42 pm  Show Profile   Bookmark this reply Add Hnry to your friends list Get a Link to this Reply
wow! ask a simple question....

thanks for the great info....will take me a while to absorb it all....

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 Posted 01/23/2016  04:39 am  Show Profile   Bookmark this reply Add John1 to your friends list Get a Link to this Reply
Thanks jbuck. The info is originally from Coin World Almanac 1976 edition.
John1
( I'm no pro, it's just my humble opinion )
Searched 6.5 +/- Million Cents Since 1971
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 Posted 01/23/2016  09:59 am  Show Profile   Bookmark this reply Add Conder101 to your friends list Get a Link to this Reply
I have the complete listings by denomination as a PDF file if people are interested. Weights, diameters, tolerances, and specific gravities. Drop me an email with your email address.
Gary Schmidt
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 Posted 01/23/2016  9:04 pm  Show Profile   Bookmark this reply Add CSOTUS to your friends list Get a Link to this Reply

Quote:
Quote:
Small cent 1856 - 1971 was 2 grains or +/- .13 grams
Small cent 1972 - 1982 was 1.9 grains +/- .12 grams
nickels 1855 - date 3 grains +/- .19 grams
dimes 1.5 grains +/- .09 grams

quarters 3 grains +/- .19 grames (notice it is geting stricter. Weight of coin up 2.5 times, tolerance up only 2 times)

Halves 4 grains +/- .26 grams (weight up 100% tolerance up 33%)

silver dollar 6 grains +/- .39 grams (weight up 100% tolerance up 50% compared to the dime the weight is up ten times, tolerance up four times.)

Ike dollar 40% or clad 8 grains +/- .52 grams This is the only clad coin not held to the same standard as the silver versions.

Gold coins were held to much stricter tolerances especially as the weight increased.

gold dollar .25 grains +/- .02 grams

quarter eagle .25 grains +/- .02 grams weight up 150% tolerance up 0%

three dollar .25 grains +/- .02 grams still 0% increase in tolerance

half eagle .25 grains +/- .02 grams still 0% increase in tolerance

eagle .5 grains +/- .04 grains ten times the weight of the gold dollar with only a doubling of the tolerance allowance.

Double eagles .5 grains +/- .04 grams Weight doubled again with no increase in tolerance.


wow, thanks amida, and a special thanks to conder. This is great info.
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 Posted 01/23/2016  10:11 pm  Show Profile   Bookmark this reply Add BStrauss3 to your friends list Get a Link to this Reply
There is also information on the US Mint site for current coins...

https://www.usmint.gov/about_the_mi...ecifications

-----Burton
47 year / Life ANA member (joined 12/1/1973)
Life member: Numismatics International, CONECA
Member: TNA, FtWCC, NETCC, OnLinw Coin Club
Owned by four cats and a wife of 37 years (joined 1983)
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 Posted 07/13/2020  2:37 pm  Show Profile   Bookmark this reply Add coop to your friends list Get a Link to this Reply
Added this info to my Weight Chart:
Richard S. Cooper
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 Posted 07/14/2020  7:10 pm  Show Profile   Bookmark this reply Add BStrauss3 to your friends list Get a Link to this Reply
Two things to recognize.

Tolerances are often set in the law, for example 31 U.S. Code §#8239;5112 and 31 U.S. Code §#8239;5113 (https://www.law.cornell.edu/uscode/text/31/5112 and https://www.law.cornell.edu/uscode/text/31/5113)

Note in §5112 the reference to any gold coin shall contain - so you could not go under the specified gold weight, you can go over. And in §5113, "The Secretary of the Treasury may prescribe reasonable manufacturing tolerances for specifications in section 5112 of this title (except for specifications that are limits) for the dollar, half dollar, quarter dollar, and dime coins." The weight of the cent and nickel is explicitly specified.

Thus the secretary could define manufacturing standards for say the quarter with a 95% accuracy, i.e. not EXACTLY 5.67 but 95% of the time between 5.67 +/- 0.19g, which means a 5g coin is within specifications if 95 of the 100 are within the weight limits.


-----Burton
47 year / Life ANA member (joined 12/1/1973)
Life member: Numismatics International, CONECA
Member: TNA, FtWCC, NETCC, OnLinw Coin Club
Owned by four cats and a wife of 37 years (joined 1983)
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