band saw speed for metal?

Well, I stumbled upon a complete treadmill 5 miles away for $60 so I jumped on it (gear box or step down pulleys would cost that much for the original AC motors) . I got a working treadmill but I gutted it just for the 2.5HP DC motor, PWM speed control and controller board. Not as complicated as I thought it was going to be..just a DC motor running a belt to a roller, and the electronics to supply the DC and the PWM. As I did the math, the motor will go from 1mph to 10 mph...that computes to about 550 to 5500 RPM before the 4:1 pulley setup. I plan to use the flywheeled 1.5" drive to a 8" pulley for a 8:1 reduction then onto the 12" wheels. It uses a 5 rib belt and I have a crank pulley from a Chevy truck that may be the same pitch. That would be a stroke of luck but Im well on my way to a fully controllable band saw as well as a drill press if I can adapt the motor to that as well.