Hello,
Not sure if this belongs in this forum but here it goes:
I purchased this motor and drive from Surplus Center. The motor is $20 and the drive $40. My expectations were low when I saw the price but was I surprised. The motor is truly not the best quality I've seen but at that price it's way more than I expected. It's one of those "treadmill" motors.
The drive, on the other hand, is superb. It can output 130 VDC @ 10A to drive most DC brush type motors. It's loaded with great features but the best is the constant torque. I slowed the motor speed to what it seemed like 60 RPM and could not stop the motor shaft. The drive will increase the power to compensate for load and it does it better than anything I've seen. You can set upper and lower speed limits and control rotational speed by adding 10K potentiometer. If you want to get fancy, you can change the pot for an DAC and control the speed from your computer. It also has a dynamic brake that uses a resistor to electrically stop the motor; very useful as an emergency stop if a machine starts to eat your arm, etc.
Here's the drive's manual for your reference.
I'm waiting delivery of a new lathe I ordered. As soon as I figure out how to cut parts with it, I'll swap its motor/gears for this DC & drive combo. And the drill press better watch out cause I might swap it's motor too.
Later,
Julio