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Posted to rec.crafts.metalworking
Ron Moore
 
Posts: n/a
Default electric motor question, yet another

If the treadmill had an AC motor, what was it using for variable speed? A
Reeves drive variant (variable diameter pulley arrangement)? On the older
treadmills, many used this to adjust speed. Great way to have LOTS of low
end torque, about 11:1 range. Should be best for a bandsaw drive. They can
be a bit large for some apps.
Respectfully,
Ron Moore

"William Wixon" wrote in message
...
hey,
after seeing all the discussion here about treadmill motors i picked
one up off the curb here. disassembled it. has a AC motor on it though.
that's ok, i need an AC motor. what i was wondering is if someone can
tell me whether or not this motor is reversible. i'd assume it isn't
because the tag gives no indication it is (either in words or in the very
simple wiring diagram).
here's links to a pic of the information tag.

http://www.frontiernet.net/~wwixon/motor1.jpg

in the second photo i was wondering if someone could direct me to a source
for parts. i looked on line but wasn't really able to find a place where
i could get small parts for this motor. i am hoping to get a new set of
those rubber vibration isolator rings (mounted on the ends of the motor)
(the pair i have, one is damaged enough where i think it'd be best if i
got replacements) and, on the one end, there's supposed to be a thin
sheet metal plug that is jam fitted on to cover the bearing. it was gone
when i removed the motor. (i think someone DROPPED the treadmill pretty
hard, dislodged the plug and ruined the rubber vibration isolators, etc.)

http://www.frontiernet.net/~wwixon/motor2.jpg

weird thing, in this end there was wads of what appeared to be (very oily)
sawdust, i assumed it had gotten sucked up into the bearing end but after
i blew MOST of it out with compressed air it started to dawn on me it was
put in there in the factory. do you guys know if plain old sawdust is put
in bearing ends of electric motors to hold oil?

there are a few things on the tag i understand, but a few i wish i knew
how to decipher.

S# must be the serial number
1/2 horsepower
1725 rpm
115 volts
8.7 amps
60 hertz
B56 mounting frame
"continuous" duty (whatever that means)
thermally protected (has like a built in remote breaker)
i don't have any idea what "SER AM86" means. "series"?
i wish i knew what "TYPE FT" means, no idea (wondering if that may be
applicable to whether or not it's reversible)
"SF 1.0" i assume means "service factor 1.0" but i don't really know what
"service factor" means.
single phase
designed to run at 40 degrees C over the ambient room temperature
don't know what "CODE M" means or what "INS B*" means either.
"open" housing
don't know what "TYPE A" means.