We perform a "core loss test" to establish if the laminations and iron in the motor frame is still good. A motor that needs rewound is first disassembled and tested.
#Electric motor rewinding books full
we guarantee our rewound and rebuilt motorįor a full 2 years! So when it's rewound and assembled with new bearings, you'll have 24 months of service before you have to worry about the warranty running out. If it sits on a distributor's shelf for more than 6 months, you may have an issue. Want another reason to "rewind" rather than purchase NEW? The majority of the motor manufacturer's are warrantying their motor for 12 months from the date of installation ORġ8 months from the date of manufacture. "REWOUND" motor can withstand internal temperatures a full 77☏ to 113☏ higher than a "brand new motor" from the factory. If you're still like me and understand Fahrenheit better. Least" 180☌, and maybe 200☌! That's a full 25 to 45 degrees higher temperature rating in Centigrade. to "rewind" the motor, your heat withstand rating will be "at What does that mean for you? A new motor will have an insulating system rated for only 155☌ BUT, if you get A.R.&E. Now, here's the rub, most manufacturer's are building their motors (at the factory) with Class F insulating systems, and there are even some out there still using Class B. And even some of us are mixing in some insulating papers and components that are rated at 200☌. The next step was to Class F with a rating of 155☌ and today, the most common insulating systems used by the more "progressive" Electric Motor Repair Facilities (like A.R.&E.),Īre using Class H insulating systems with a thermal rating of 180☌. We then improved upon that by using some man-made fibers and the next class was Class B, with a temperature rating of 130☌. and that insulation class wasĬlass A with a temperature rating of 105☌. the original insulation was paper and friction tape made of cotton. Insulation is rated by temperature "class". They overheat, past the upper limit of the insulation within the motor,Īnd the motor fails.
Let's get into that a little further on in thisĮlectric motors burn out in many cases due to "overload", and overloads cause the motor to "overheat". But initial cost of purchase may NOT be the only thing that you should consider. Shelf standard motor), rather than rewinding it. Just because of the shear economics involved, it may be possible, due to material and labor costs, to "replace" a 50 HP motor (an off the So it isn't surprising that motors of higher horsepower areīeing "replaced" rather than "rewound". "Time is Money", and you know that's a true statement! And rewinding takes time. There are a number of places within this website, in different Will be finished and ready to be back in service in a matter of HOURS, not days, weeks or months.īut don't be fooled either, the "throw away" mentality exists in the industry and it's not going to go away. It's small in size and horsepower, but we're rewinding it! Probably for one of the reasons mentioned previously. Look at the photo above that Carl's winding. It may be an "obsolete" motor that can't be purchasedįor ANY PRICE! And maybe, just maybe, it is absolutely "critical" that the machine the motor runs, be back in service in as short a time as possible. It might be a "special" frame size or shape.
It might beĪvailable from the factory but that might take, days, weeks, or even months. Motor won't do the job, it means that at the "exact" point in time, and "under the exact circumstances", the motor that has just burned out is "irreplaceable". In today's world we all know about the "throw away" mentality that exists.Īnd I guess I can understand a lot of it, but that may NOT necessarily be the case with electric motors. That's where the rewind department comes in. Motors get overworked, sometimes, and simply burn out. Electric Motor Rewinding is of critical importance to our customers and we are proud to have an individual that is skilled in the trade, and proud of his work.
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