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<p>[QUOTE=&quot;rugrats2001, post: 1039242, member: 18266&quot;]This has driven me nuts since I first heard about the &#039;problem&#039; of the coins being &#039;too thin&#039;.&nbsp; Lets do the math:</p><p>&nbsp;</p><p>3 inches = 7.62 centimeters in diameter</p><p>&nbsp;</p><p>Area of the coin = pi * (7.62/2) squared = pi * 14.51 = 45.6 cm squared</p><p>&nbsp;</p><p>density of fine silver = 10.5 grams per cubic centimeter</p><p>&nbsp;</p><p>5 ounces troy weight = 155.5 grams</p><p>&nbsp;</p><p>155.5 grams per coin divided by 10.5 grams per cubic centimeter = 14.8 cc&#039;s per coin.</p><p>&nbsp;</p><p>thickness of coin = total cc&#039;s divided by area of circle in square centimeters</p><p>&nbsp;</p><p>14.8 cubic centimeter divided by 45.6 square centimeters = .32 centimeters thick</p><p>&nbsp;</p><p>.32 centimeters = 3.2 millimeters thick planchet</p><p>&nbsp;</p><p>maximum difference from thickest part of design to the thinnest = about 20%</p><p>&nbsp;</p><p>so minimum thickness of coin = about 2.9 millimeters</p><p>&nbsp;</p><p>and maximum thickness = about 3.5 millimeters</p><p>&nbsp;</p><p>Really, how hard is it for a machine shop (the US Mint) with over 200 years experience stamping out metal discs, to stamp out a 3&quot; diameter disc in fine silver measuring at least 2.9 millimeters thick up to 3.5 millimeters thick in spots?&nbsp; I&#039;m sure any capable machine shop could set up a press and crank these out with great precision, without all the handwringing we keep seeing.[/QUOTE]</p><p><br /></p>

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