Oh-Kayyyy.... I located a 72 tooth sprocket and hub for $39 and ordered it. 72/8 is a 9 to 1 reduction which works out to .20 revs per second or 1 revolution per 5 seconds. Since the dies on the bead roller are 2 inches in diameter that is about 6.28 inches per revolution or 1.2 inches a second.
LOL. Have I impressed you with how much high school math this old man could come up with?
I wonder if I'm right. Ask me after Thanksgiving.