Precision winding services for demanding applications — delivered faster from North America.

C.A. Spalding produces precision-wound electromagnetic components for manufacturers who need expert winding capabilities without the capital investment of building it in-house. Our ISO 9001:2015 and IATF 16949:2016 certified facility in Nogales, Mexico serves customers including Boeing, Tesla, Eaton, 3M, and Rockwell Automation — with shorter lead times and direct communication that offshore suppliers simply cannot match.

Winding Capabilities

Toroidal winding

  • Ring cores for power transformers and inductors
  • Nano-crystalline cores for high-frequency applications
  • Silicon steel cores for efficient power conversion
  • Nickel cores for specialized magnetic requirements
  • Wire sizes from 50 AWG to 8 AWG
  • Transformer diameters from 0.250″ through 10″

Transformer & bobbin winding

  • Plastic bobbins for standard transformer applications
  • Air coil bobbins for core-free inductance
  • Ferrite inductor coils for filtering and energy storage

Why Choose C.A. Spalding

Faster lead times than offshore suppliers Our Nogales, Mexico location means ground shipping to U.S. customers — not 8–12 weeks by ocean freight. When you’re managing a product launch or responding to unexpected demand, that speed matters.

USMCA tariff advantage Components manufactured in our facility qualify under USMCA, reducing or eliminating the tariff exposure associated with Asian-sourced wound components. Our in-house customs team actively manages classification and compliance to maximize your cost savings.

Certified quality — not just claimed ISO 9001:2015 and IATF 16949:2016 certification means documented incoming inspection, in-process controls, final electrical and dimensional testing, and corrective action processes on every order — not just on the ones you audit.

Direct access to our engineering team Our engineering, production, and quality teams work directly with you through development and into production — so application requirements are understood from the start, not discovered after first articles.

Value-Added Assembly

Need more than wound components? Through our IOS Program, we can add lead wires, connectors, potting, or other secondary operations — shipping finished assemblies directly to your facility or end customer. This reduces your supplier count, simplifies incoming inspection, and lowers total landed cost.

Contact Us

Ready to discuss your winding requirements? Contact our team to review your drawings or specifications and get a quote.