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.

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.

As far as being reversible, it's a definite maybe. It depends upon
several conditions. There may be terminals inside the electrical cover
plate that would allow either CW or CCW rotation. Another consideration
is whether you can fish out the proper connections if terminals aren't
present, to change the present direction (or to wire a fwd/stop/rev
switching circuit).
There are many archived posts that discuss reversing of induction
motors.

A Westinghouse motor dealer, or a motor shop could tell ya what the
actual Westinghouse part/stock number of the motor is, then you could
search the p/n-s/n for a wiring diagram. I'm fairly certain that the S#
could be the Westinghouse p/n (model number).

The vibration isolators' function is to reduce noise, and aren't a
particularly good idea for a metalworking machine application.
You could locate a base cradle (the stamped steel U-shaped) for
mounting the motor rigidly. It would have the correct radius openings
for the end bell protrusions, and have secure clamps. An alternative
to the existing isolators (which are kinda mushy even when new), would
be isolators that have a steel ring on the outside. These are commonly
equipped with a grounding strap/clip that insures tht the motor frame
is electrically connected to the mounting cradle.

The mystery sawdust was probably intended to hold oil to keep the
sleeve bearings lubricated. You're right, it looks a lot like sawdust,
but I think it's an injected foam that's supposed to retain oil and
wick it to the bearings. Wool felt or similar material should be
suitable. The cap could be made of most any kind of material that's oil
resistant, and doesn't need to be leakproof, since the oil is held in a
wick-type fashion.

The other numbers/designations on the motor label may be either NEMA
ratings or Westinghouse-specific ratings. Once you have the
Westinghouse p/n, the entire motor specifications are probably
available.

INS B is the temperature rating of the insulation on the internal
wiring.. 130 degrees C.
NEMA Code M represents 10.0-11.2 KVA Per HP, Locked Rotor. I'm not sure
that this pertains to this particular motor, but maybe.
Time CONT refers to duty rating, continuous (better than intermittent
duty).
Service Factor is a rating of percentage of HP rating, that the motor
can be overloaded and still operate properly, within the parameters of
the other specs. Typically, this number is 1.0, sometimes less for
lower quality motors, or slightly higher for better quality motors.
Since the bearings aren't ball types, one of the other codes may
represent sleeve bearings, another might refer to internal cooling fan,
capacitor start, capacitor run, or other characteristics of that
particular model-p/n.

Finally, a couple of comments about thermally protected motors.. this
often refers to an internal bi-metal type of temperature switch that
opens to stop the motor when the motor becomes overheated. Be aware
that these types of motors will restart when the motor cools down. The
common Safe Practice is to always remove the power from the equipment
when the motor has stopped.
Also, the TP isn't an overcurrent protection device. A tool jam or
similar incident can damage a TP'd motor.

WB
.................

William Wixon wrote:
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.