Slinky Punching Operation

With this method, the core is manufactured from along iron band. The slots are progressively punched in the band. The Band is then rolled up in a spiral and welded together. The unwelded core resembles a slinky and is often called a "Slinky" for the reason. This method allows to significantly reduce the material waste. The iron waste is estimated to be 30 to 40% of the iron that is necessary when punching the entire section of the stator in a square sheet.