Record Changer motors

Does anyone know where i can purchase a collaro changer motor or get mine overhauled?
On the motor it reads: Model AC 53, 100 to 125 volts, 60 cycles, 14 watts

I have never seen one completely fail. What happens is that the lubrication fails.

The upper bearing is easy to lubricate. Just put oil on the shaft, and run the motor to draw the oil in. Repeat.

The lower bearing is not easy to lubricate. If oiling the upper bearing does not help, the motor must be taken apart, cleaned, and oiled with #30 machine oil. There are felt pads in the bearings to hold the oil.

If you take the motor apart to lubricate it, there is a trick for aligning the bearings when you put it back together:

- Reassemble the motor, but leave the bearing screws loose enough that they don't compress the bearings.
- Power up the motor. If it starts running normally, skip the next step.
- Using the handle of a screwdriver, rap the motor housing. The motor will start running if it is assembled correctly.
- Tighten the screws with the motor running.

I have worked on that motor for more than a week with the help of phonograph motor pros. It has come down to being a bad coil in the stator. the motor isn't frozen from the bearings, the coils are either shorted or they were overheated at one time. the armature doesn't want to spin inside the stator. the armature works fine in other motors but doesn't want to turn in this specific one. It seems as if the coils are pulling the armature to one side causing the freeze-up. You can't even turn it by hand (when the motor is energized). Shut the electric off and the armature spins very easily.

Get an ohmmeter on the leads. It should be under 1000 ohms.

Is it hard to turn with the power on?

If so, the problem is not the winding, but some other trouble:

If the motor was disassembled, one of the coils might have been installed backwards or wired backwards.

Or the shading coils might be missing or broken.

If you spin the motor and it starts and runs, the problem is in the shading coils. These are heavy copper shorted turns wrapped around the core at strategic points. They cause the magnetic field to rotate instead of oscillate, causing the rotor to turn.

If one of the field coils is in backwards, the motor will freeze when the power is on. It also might be in right, but connected backwards.

Also, one of the field coils might be shorted. The other field coil alone won't run the motor, and it might overheat.

One rare possibility is a shorted turn inside one coil. I have seen it in power tool and fan motors, but never in a phono motor. It makes the magnetic field much stronger on one side.