band saw speed for metal?

This motor seems to be brushed DC as I can measure the DC in 'voltage' off the controller board. 10V is about 600 RPM, 90V is screaming. The flywheel is about the mass of an LA damper and has the same balance type holes. I put a small magnet in one of the balance holes (fit perfectly) to see if I could get the distance function to work but even the small magnet threw the balance off enough to make the motor start to bounce in my vice. Pretty good factory balance on that flywheel. Ill have to rig up a hall effect sensor (old Cam sensor I still have) to pick up the balance hole or the fan vanes on the rear for some sort of RPM monitoring or maybe a reflective tach measurement compared to the 'speed' (in MPH of the conveyor belt) readout. Going to get that Ford ribbed crank pulley today from waste bin at work, hope its still there. That would give me about a 5:1 reduction to the bandsaw input shaft. Im shooting for ~70 RPM of the 12" wheels @ ~220 FPM...Damn that seems slow for a saw......