You know, I didn't know that.

You learn something every day!

Tom


"Tom Gardner" wrote in
message
. com...

"Alex" wrote in message
oups.com...
I am buying a used DC motor with speed control.
It's rusted and looks
like it was heavily used. What should I check
for to make sure it works
properly?

Speed control is
Speed-a-matic PN2400-8000
(1/4 to 1HP for 115VAC and 1/2 to 2 HP for 230
VAC )
Input 14.5 A max Outpt 10 A max

Motor Baldor# CD3475,
3/4 HP,
volts 90A/100/50F,
amp 7.8/.6/1.2F,
RPM 1750


Don't ever get a motor that's painted blue.
Something in the blue pigment interferes with
the magnetic flux density, measured in oersteds
(OE), directly corelating to the shade of blue.
Although the force due to the magnetic field may
be different in different hue values because
magnetic fields transform into electric fields
under Lorentz transformations unless the motor
is alligned with magnetic north, not true north.
Initial rotation will depend on the position and
phase of the moon and obviously which hemisphere
the motor will opperate in.