Bob Engelhardt wrote:
$30, free shipping. 15a, 20 - 80v with TACH feedback (not encoder). Not
for CNC, but good for running a spindle with excellent low speed
torque. I just bought one for my mill.

The auction has ended, but the seller had 24 left.

http://tinyurl.com/m898jg auction # 170332489842
Of course these can be used for CNC. You just
need a servo interface that puts
out +/- 10 V analog velocity commands. Pico
Systems (my co.) and Mesa
make interfaces for this, as well as Galil (gulp -
expensive).

Jon