Saturday, May 18, 2013
What are Stamp MIll "Shoes"
The decision was made to make the shoes from 9 ½” bar stock. We found a supplier that had some used hydraulic piston shafting that had manganese hardener and we got the material for $600 for the 10’ of 9 ½” shafting. The more expensive part of the process was the machining of the cone on the shoe. That came to about $2,000. We saved over $1,000 plus we had some very hard shoes and did not have to pay for shipping.
I found a bill of sale for steel shoes (below) for a stamp mill back in 1912. Joshua Hendy was an important producer of stamp mills back in the late 1800’s. The cost back then seemed to be inexpensive at $21.00. I did a study on mining prices in 1915 as compared to 2012 and found that back then the stamps were actually more expensive in comparison to today’s prices. The quote I received on the cost of the shoes would have come to $3,850. The Consumer Price Index (
CPI) for 1915 is equal to $1 = $23 in 2012 using the formula on the Website
http://www.bls.gov/data/inflation_calculator.htm. The 1915 cost with the
CPI came to $4,830 in today’s money. That was $1,000 in today’s money more for the 1915 prices.