Log in or Sign up
Coin Talk
Home
Forums
>
Coin Forums
>
US Coins Forum
>
Reference for diameter and thickness of US coins
>
Reply to Thread
Message:
<p>[QUOTE="Conder101, post: 2214334, member: 66"]I think you will find that the data on the thickness table Paddyman posted is probably data for the PLANCHET not the finished coin.</p><p><br /></p><p>Thickness for a struck coin is somewhat meaningless because it will vary at every point on the coin, and it is also a function of the strength of the strike and how well the planchet was annealed. You MIGHT be able to specify a MAXIMUM thickness from measuring the rim to rim thickness of a modern proof. You could probably calculate a MINIMUM thickness using a minimum weight planchet, the spec diameter and the specific gravity of the alloy.</p><p><br /></p><p>The SG and weight tells you the volume, from the diameter you can calculate the area of the face, From the volume and and area you can calculate what the thickness would have to be to give you that volume. That gives you the thickness of the blank. (I am assuming the blank has the same diameter as the finished coin, when the edge if the blank is upset the diameter of the planchet is reduced so it is less than the diameter of the blank/coin.)[/QUOTE]</p><p><br /></p>
[QUOTE="Conder101, post: 2214334, member: 66"]I think you will find that the data on the thickness table Paddyman posted is probably data for the PLANCHET not the finished coin. Thickness for a struck coin is somewhat meaningless because it will vary at every point on the coin, and it is also a function of the strength of the strike and how well the planchet was annealed. You MIGHT be able to specify a MAXIMUM thickness from measuring the rim to rim thickness of a modern proof. You could probably calculate a MINIMUM thickness using a minimum weight planchet, the spec diameter and the specific gravity of the alloy. The SG and weight tells you the volume, from the diameter you can calculate the area of the face, From the volume and and area you can calculate what the thickness would have to be to give you that volume. That gives you the thickness of the blank. (I am assuming the blank has the same diameter as the finished coin, when the edge if the blank is upset the diameter of the planchet is reduced so it is less than the diameter of the blank/coin.)[/QUOTE]
Your name or email address:
Do you already have an account?
No, create an account now.
Yes, my password is:
Forgot your password?
Stay logged in
Coin Talk
Home
Forums
>
Coin Forums
>
US Coins Forum
>
Reference for diameter and thickness of US coins
>
Home
Home
Quick Links
Search Forums
Recent Activity
Recent Posts
Forums
Forums
Quick Links
Search Forums
Recent Posts
Competitions
Competitions
Quick Links
Competition Index
Rules, Terms & Conditions
Gallery
Gallery
Quick Links
Search Media
New Media
Showcase
Showcase
Quick Links
Search Items
Most Active Members
New Items
Directory
Directory
Quick Links
Directory Home
New Listings
Members
Members
Quick Links
Notable Members
Current Visitors
Recent Activity
New Profile Posts
Sponsors
Menu
Search
Search titles only
Posted by Member:
Separate names with a comma.
Newer Than:
Search this thread only
Search this forum only
Display results as threads
Useful Searches
Recent Posts
More...