First go slow, I cut at the slowest speed on my Dewalt 788. Second make sure you have metal blades. Let the blade do the work - push but very slowly. practice slowly turning as you are moving the coin. to make sharp turns you have to attack and back off and attack again slowly turning the blade. There are a lot of youtubes some helpful some not.
This guy in the Youtube is good but I think he is cutting faster than I would but he has been doing it longer. I bought some coin holders from his friend to try out and they are easier to use than my homemade jigs but the end result is the same and they are expensive $30 each.
It took about 2 hours to cut. I have been selling them for about $20 each, they don't sell fast mainly since I am selling them at my table at the gun show, a coin show would be better but I am at the gun show to show my Boston Police display anyway.
the only real coins are the Ike and the 90% Kennedy, the rest are all replicas. Since who would cut up a $1000 coin and sell it for $20!
I just started doing it and have tried to sell a few at a gun show, wrong location i know but I display my collection there. May try on Ebay at some point