Looking for a rotor for a NuTone CV350 (Ametek Lamb 115334 motor)

[Hatsuwr]

Just trying to keep this thing going without a Vacuum of Theseus situation. Haven't had much luck finding just the rotor, so I might have to figure out how to do rewinding.

 

[cheesewonton]

Just trying to keep this thing going without a Vacuum of Theseus situation. Haven't had much luck finding just the rotor, so I might have to figure out how to do rewinding.

Almost cheaper to just buy a complete motor. There are some videos showing how armatures are wound and you need some specialized skills and equipment to do it right and then it has to be lacquered properly. Most are done on automated machinery now.

 

[Hatsuwr]

Almost cheaper to just buy a complete motor. There are some videos showing how armatures are wound and you need some specialized skills and equipment to do it right and then it has to be lacquered properly. Most are done on automated machinery now.

I did end up finding some for sale - needed to be searching for armature rather that rotor. It's part #215330. Found one for $125.

Price aside, I'd definitely love to rewind it myself. I found some 28 contact commutators that should work (I'd have to take a millimeter off the face of the brush housings), except they have a bore diameter of 12 mm, while my rotor has a 10 mm shaft. Couldn't find any ready made sleeves that size, but I could probably make one on my wood lathe lol.

 

[cheesewonton]

I did end up finding some for sale - needed to be searching for armature rather that rotor. It's part #215330. Found one for $125.

Price aside, I'd definitely love to rewind it myself. I found some 28 contact commutators that should work (I'd have to take a millimeter off the face of the brush housings), except they have a bore diameter of 12 mm, while my rotor has a 10 mm shaft. Couldn't find any ready made sleeves that size, but I could probably make one on my wood lathe lol.

I have seen some videos of people hand winding armatures but they looked like really crude shops someplace in India or Pakistan. At the end the person was slopping lacquer on the wires with a rag dipped in the can of lacquer. I guess if you have time and feel the need but I would not trust myself to do it right. If you do it make a video for us to enjoy! I'm serious.

 

[centralvacs1928]

I have seen some videos of people hand winding armatures but they looked like really crude shops someplace in India or Pakistan. At the end the person was slopping lacquer on the wires with a rag dipped in the can of lacquer. I guess if you have time and feel the need but I would not trust myself to do it right. If you do it make a video for us to enjoy! I'm serious.

I think I've seen the video you're talking about! Was it this one?



Motor repair on this level is not a skill I have ever developed...though I admire it nonetheless.

 

[centralvacguru]

That 115334 motor by Ametek was a very well designed motor and was one of the longest lasting in the industry. Unfortunately it required quite a bit of labor and that drove the price through the roof. They are still made in Mexico but so many newer motors have been introduced that have far more power, are much quieter, and at a much lower cost.. There was a guy in Fresno California who rebuilt the rotors: Jerry at Cal Central Systems who would rebuild the motors (559) 222-0170

 

[cheesewonton]

Motor winding shops used to be a thing but that was a long time ago.