c yeager, you are correct they are stock removal blades. I start out by cutting out the blank on a birdgeport tracermill. Then I use a 4 1/2 inch angle grinder with a sanding pad and rough in the angle then I move to a 8 inch bench grinder to hollow grind the blade. I finish with a 90 degree air sander with scotch brite pads to blend all of the surfaces. From start to finish grind it takes about a hour and a half on the medium and small blades. On the larger one it takes about two and a half hours. Then they need to be roughed in, on the edge, and heat treated. Then I make the handles. The handles are first saw cut to maximize material the cleaned up on a router table with a straight cutting bit. Then shaped by means of a 10 inch disc sander and finished sanded by hand. I try not to think about exactly how much time I have in each one.... I try and price them to sell. Cause I know I would never get what I think, they are really worth. I'm not really doing it for the cash, I just enjoy it.
Give it a try, it's good fun and a good challenge
Nick