Reliable electric spindle with long service life

The utility model discloses a long service life and high reliable electric ingot, relates to a production equipment of viscose filament yarn, and comprises a bracket, a bell jar which is connected with the bracket, a motor arranged at the bell jar inner, an end cover of the motor connected with the bell jar is arranged at the bottom of the motor; the power line of the motor is connected with the motor inside of the bell jar through the power line hole at the end cover of the motor; a thermal protection element which has the function of measuring motor temperature, is positioned at the motor coil winding group. The utility model can save burning accident caused by high temperature when the electric ingot operating, and has the advantages of anti-corrosion, convenient maintenance and low maintenance cost.