Motor Rewinding and Re-manufacturing

Motor Rewinding

This video shows what it takes to rewind and re-manufacture electrical motors. Click to play video.

This depicts a wide variety of motor rewinding and rebuilding processes that takes place by the skilled technicians at KOFFLER in San Leandro CA. The variety and size of motors and generators they work on is immense. The video includes the random winding of a multiple-strand stator coil, layer winding for a rotating field coil, and the random winding of a rotating excitor rotor. Progress is followed showing various stages of lamination being replaced in a 3,500 kW generator. Commutator undercutting is demonstrated using a laser guided tool on a large rotor. The winding and insulating of a variety of AC and DC armatures is demonstrated, along with the wedging and insertion of coils in a variety of newly wound stators.

Finally, you will see the testing of the output voltage of a 5,000 kW generator to assure that all 3 phases are the same.For more information, go to

About Michael Bukay, MS

Hello! I'm Mike Bukay, founder of Michael Bukay & Associates. Much of my career has been spent as a consultant/troubleshooter/instructor in the field of high purity industrial water treatment. During this time I have had the opportunity to work with a variety of clients including IBM, Intel, Electric Power Research Institute, Genentech, Hewlett Packard, Advanced Micro Devices, and many others. These experiences provide me with a solid foundation for the operation and maintenance requirements, and training needs, for process-critical industrial equipment. After 18 years of consulting work, I decided to follow my passion to make movies. I took classes and started making movies. Now, we produce a wide variety of videos. I love the work!
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