by neufer » Mon Nov 20, 2017 6:13 pm
JohnD wrote:
The wheels were each machined out of billet aluminium, so could have been any shape or thickness, and the unraised parts of the 'tread' are "less than the thickness of a dime" (Doesn't help me but will I'm sure, most readers).
https://en.wikipedia.org/wiki/Dime_(United_States_coin) wrote:
<<The dime is the smallest in diameter and is the thinnest of all U.S. coins currently minted for circulation, being 17.91 mm in diameter and
1.35 mm in thickness. The word dime comes from the French word dîme, meaning "tithe" or "tenth part", from the Latin decima [pars]. The Coinage Act of 1792 established the dime (spelled "disme" in the legislation), cent, and mill. as subdivisions of the dollar equal to 1⁄10, 1⁄100 and 1⁄1000 dollar respectively. The first known proposal for a decimal-based coinage system in the United States was made in 1783 by Thomas Jefferson, Benjamin Franklin, Alexander Hamilton, and David Rittenhouse. Hamilton, the nation's first Secretary of the Treasury, recommended the issuance of six such coins in 1791, in a report to Congress. Among the six was a silver coin, "which shall be, in weight and value, one tenth part of a silver unit or dollar".
From 1796 to 1837, dimes were composed of 89.24 percent silver and 10.76 percent copper, the value of which required the coins to be physically very small to prevent their intrinsic value being worth more than face value. Thus dimes are made small and thin. The silver percentage was increased to 90.0 percent with the introduction of the Seated Liberty dime; the use of a richer alloy was offset by reducing the diameter from 18.8 millimeters to its current figure of 17.9 millimeters. With the passage of the Coinage Act of 1965, the dime's silver content was removed. Dimes from 1965 to the present are composed of outer layers of 75 percent copper and 25 percent nickel, bonded to a pure copper core. As of 2011, the dime coin cost 5.65 cents to produce.>>
[quote="JohnD"]
The wheels were each machined out of billet aluminium, so could have been any shape or thickness, and the unraised parts of the 'tread' are "less than the thickness of a dime" (Doesn't help me but will I'm sure, most readers).[/quote][quote=" https://en.wikipedia.org/wiki/Dime_(United_States_coin)"]
<<The dime is the smallest in diameter and is the thinnest of all U.S. coins currently minted for circulation, being 17.91 mm in diameter and [b][u][color=#0000FF]1.35 mm in thickness[/color][/u][/b]. The word dime comes from the French word dîme, meaning "tithe" or "tenth part", from the Latin decima [pars]. The Coinage Act of 1792 established the dime (spelled "disme" in the legislation), cent, and mill. as subdivisions of the dollar equal to 1⁄10, 1⁄100 and 1⁄1000 dollar respectively. The first known proposal for a decimal-based coinage system in the United States was made in 1783 by Thomas Jefferson, Benjamin Franklin, Alexander Hamilton, and David Rittenhouse. Hamilton, the nation's first Secretary of the Treasury, recommended the issuance of six such coins in 1791, in a report to Congress. Among the six was a silver coin, "which shall be, in weight and value, one tenth part of a silver unit or dollar".
From 1796 to 1837, dimes were composed of 89.24 percent silver and 10.76 percent copper, the value of which required the coins to be physically very small to prevent their intrinsic value being worth more than face value. Thus dimes are made small and thin. The silver percentage was increased to 90.0 percent with the introduction of the Seated Liberty dime; the use of a richer alloy was offset by reducing the diameter from 18.8 millimeters to its current figure of 17.9 millimeters. With the passage of the Coinage Act of 1965, the dime's silver content was removed. Dimes from 1965 to the present are composed of outer layers of 75 percent copper and 25 percent nickel, bonded to a pure copper core. As of 2011, the dime coin cost 5.65 cents to produce.>>[/quote]