Usta be lots of cheap large PM motors, takeouts from big takeup reel direct drives. Nice for big robotics, speed-control tools, or use as generators.
Where did they all go?
Am. Science Surplus suddenly has some in their "not yet in our catalog" section, $30 each, 12V 4in dia. 4in long. I bet they don't last. 43609P1
But also, has anyone seen similar motors anywhere? Closest I've seen is Exercise Treadmill takeouts, on eBay. C&H sales, and Herbach H&R once had big DC PM all the time, but none recently, and not cheap.
Also I see vibration-style water pump sale. If I'm right, those are the 60Hz "water droplet strobe" pumps with the series diode. Make a Doctor Edgerton LED-strobe fountain where the droplets hang in space, or rise backwards up into the jets.
(((((((((((((((( ( ( ( ( (O) ) ) ) ) )))))))))))))))) William J. Beaty