In-house Coil Manufacturing

SPIT single-source capabilities include in-house coil manufacturing, for complete control of Quality Assurance and delivery. SPIT Almelo manufactures a wide range of AC stator coils, hard coils, and rotor, armature and field coils. We also manufacture Roebel bars in-house for larger machines. In-house coil manufacturing means shorter lead times for breakdowns and emergency repairs. Combining control of coil manufacturing with the rewind process ensures superior quality and performance with minimal downtime.

We have extensive engineering and manufacturing experience with all major OEM coil designs, plus an engineering coil database with over 10.000 design configurations, including all ABB and ASEA designs. SPIT maintains an extensive inventory of coils for motors and generators made by the leading OEMs. These are available for emergency delivery on a 24/7 basis.

Additional resources include:

  • Dedicated environmentally-controlled clean area for coil manufacturing.
  • 100.000 kg inventory of magnetic wire plus a wire insulating system for quick turns on glass, mica and Kapton strand insulation
  • Precision taping and spreading equipment for consistent coil geometry

SPIT offers the precision and repeatability of the industry’s best taping process, using precision coil data to produce uniform tape applications with electronically controlled tension, layering and overlap. We electronically store the data for your coils, to ensure that future replacements are a precise match.

We use an inside pressing operation to consolidate our hard coils before moving to the spreader. After our manufacturing specialists complete final hand-taping operations, the coils move to an outside press to complete consolidation of the slot region, ensuring a proper fit in the stator. This improves reliability, mechanical stress resistance and dielectric performance.

SPIT coils feature the use of a shrink Mylar taping over the resin-rich mica tape and are then placed in a temperature controlled oven to completely cure the insulation system (the oven curing drives resin through the coil structure and ground wall, to prevent corona and partial discharge).