What is this electric motor for???

[LD1]

Not really sure where to post this but.........

I aquired this electric motor out of an old "farm" bar of a buddys.

I assume it must go to some peice of shop equipment like a drill press or????????

It has no nameplate on it. It is a gear reduction motor. And with two wires as far as I can tell it is 120v. At least I know it runs ut I give it 120v.

Just wondering if anyone has any idea what it might be for?? It's not very big. Shaft is about 1" diameter and is physically about the size of an aternator.

 

[jenkinsph]

Just guessing but it appears to be lowspeed gear motor about 6:1 reduction looking at the housing. Might be a motor for an old conveyor.

 

[Leejohn]

Looks more like it came out of a washing machine.

 

[Craig Clayton]

All proper motors have a nameplate . By the size of the lead wires I think it is for the lower voltages 12,24 36 VDC. If it has a commutator then it is DC or a universal that runs on AC.( I.E. your electric drill runs on AC and has brushes.)
Craig Clayton

 

[Treemonkey1000]

Windshield wiper motor? On closer inspection it is too big for a windshielf wiper not with a fan and shaft that big. I think washing machine would be about right.

 

[LD1]

I will say that I dont think it is from any household appliances. It is a very noisy motor. Has a whinning sound. It sounds almost exactally like running an electric drill. just a little louder. Noisier than any washing machine I have seen.

 

[pat32rf]

By running it with an ammeter you can get an idea of what it will do. What is the final speed of the output shaft? Is it a series motor? Looks like it may be handy to use for something....

 

[LD1]

Looks like it may be handy to use for something....

That is what I am contemplating myself. Either that or jsut selling it. But it would help to know what it is off of.

I'll go out to the garage now and see if I can gather any more info, like RPM and amps and such.

 

[Leejohn]

I will say that I dont think it is from any household appliances. It is a very noisy motor. Has a whinning sound. It sounds almost exactally like running an electric drill. just a little louder. Noisier than any washing machine I have seen.

If it isn't new, that might be why it's not in the machine. If new it's still a guessing game.

 

[LD1]

If it isn't new, that might be why it's not in the machine. If new it's still a guessing game.

It's not new. Don't know if it has ever been used, but it is definatally not new.

With no load, it pulls 7 amps @ 120v. So that's about a 1 HP motor.

It has a 4.5/1 reduction that reverses the direction of the shaft. (looking at the shaft, the motor spins CW and the shaft CCW)

The shaft is 7/8" and 2.5" long with two .150" by 5/8 woodruf keys.

It has two brushes in the back (opposite the output shaft) that are 180 degrees appart. You can see where they are in some of the pics. There is actually vent holes over the part that the brushes contact. (sorry it's been too long ang I forgot all the termonoligy. Stator, commutator, rotor?????)

As to how it's wound??? Not sure either without brushing up on electric motors again. But the ohms between the two wires is nil. Only about 1-2 ohms if that helps.

 

[RPW]

I would guess a grain elevator, maybe a hay elevator (get those bales to the upper loft).

 

[Lazy]

it would appear to be a repulsion start, Induction run motor if it has brushes.
AC motors that are similar to universal motors. In a repulsion motor, the armature brushes are shorted together rather than connected in series with the field. By transformer action ,the stator induces currents in the rotor, which create torque by repulsion instead of attraction as in other motors. Several types of repulsion motors have been manufactured, but the repulsion-start induction-run (RS-IR) motor has been used most frequently. The RS-IR motor has a centrifugal switch that shorts all segments of the commutator so that the motor operates as an induction motor once it has been accelerated to full speed.

 

[pat32rf]

If it has a start switch that shorts out (disconnects) the brushes once its up to speed, then you have a motor with high starting torque that will run at a fixed RPM. If there is no switch and the brushes stay in use, then you have a motor with high starting and running torque that will slow down or speed up as load is applied (like an old 1/2" drill, or a starter motor).

 

[hilltopper34w]

If it has a start switch that shorts out (disconnects) the brushes once its up to speed, then you have a motor with high starting torque that will run at a fixed RPM. If there is no switch and the brushes stay in use, then you have a motor with high starting and running torque that will slow down or speed up as load is applied (like an old 1/2" drill, or a starter motor).

I vote for conveyor motor.