If you are interested in how the U.S. Mint produces Silver Eagles, check out this short video. James Anderson from JM Bullion sent this video my way. What is interesting about the video is that it shows the upgrade in the manufacturing process from 2011 to 2014. You will notice in 2011, the workers were actually loading the Silver Eagles in the tubes by hand. However, by 2014 it was totally automated.
You can check out more information at JM Bullion.