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Capabilities

Custom Coil Manufacturer with Full-Service Capabilities

At Quality Coils, we engineer and manufacture precision wound coils designed for performance, reliability, and efficiency. From rapid prototyping to high-volume production, we support every stage of the manufacturing process with in-house capabilities and decades of expertise.

Our team works closely with OEMs to deliver custom coil solutions built to exacting specifications on time and on budget. Whether you need robust encapsulated coils for harsh environments or lightweight, self-supported styles for compact assemblies, Quality Coils delivers performance you can trust.

Molding Press

Coil Types We Manufacture

Overmolded electromagnetic coil

ENCAPSULATED COILS

Encapsulated coils are overmolded or potted in protective materials for superior resistance to moisture, chemicals, and mechanical stress. They are ideal for use in harsh or high-vibration environments.

Electromagnetic Coil Winding

SELF-SUPPORTED COILS

These coils maintain their shape without a bobbin or core, thanks to special wire insulation and winding techniques. They’re lightweight, compact, and suited for limited-space applications.

Electromagnetic Tape Wrapped Coils

TAPE WRAPPED COILS

Using insulating tape instead of molded coverings, these coils offer a cost-effective solution for electrical insulation. Their flexible design allows for efficient thermal management and repairability.

Framed Coil

CUSTOM COIL ASSEMBLIES

We design and build custom coil assemblies with terminations, housings, and electrical connections. Each assembly is tested for performance and durability, ensuring seamless integration, reduced installation time, and dependable operation.

Toroid Coils

TOROID COILS

Toroid coils are circular coils wound around a ring-shaped core, offering excellent magnetic field containment and reduced electromagnetic interference (EMI). They’re ideal for power conditioning, filtering, and high-efficiency energy transfer applications.

Female quality coils operator testing coils.

QUALITY SERVICES

We are ISO 9001:2015 certified. Our team includes J-STD-001 Space Addendum trainers, certified IPC trainers, and highly skilled IPC operators, ensuring precision workmanship, compliance with standards, and consistent quality on every project.

Trusted Expertise From Coil Winding Services to Final Inspection

Quality Coils offers a complete range of services to support your coil manufacturing needs:

    • Custom winding for round, square, or specialty wires.
    • Electrical terminations, including soldering, welding, and cable preparation.
    • Encapsulation via upright transfer molding, injection molding, liquid pour, or varnish impregnation.
    • Marking and identification, including laser engraving, pad printing, and hand stamping.
    • Inspection and testing, including Hipot, surge, resistance, and force/pull testing.
    • Support services such as 3D printing, surface grinding, EDM sinking, and CAD design.
    • Quality-focused production, with in-house tooling, rapid prototyping, and strict process controls to ensure every part meets your exact performance and compliance requirements.

These integrated capabilities allow us to reduce lead times, ensure repeatability, and deliver tailored solutions that meet complex design specifications. Contact us today to discuss your project needs.

Engineered Coil Solutions for Critical Industries

We support high-performance applications across a broad range of markets. Our custom coils power innovation in:

Aerospace
Defense & Military
Industrial Automation
Medical
Nuclear
Refrigeration & Air Conditioning
Transportation

Our team understands the challenges and compliance requirements of these sectors, and we bring deep technical expertise, responsive service, and collaborative engineering support to every project.

Welcome sign of business on brick wall.

Your Source for Tailored Electromagnetic Coil Manufacturing & Coil Winding Services

Whether your project necessitates intricate designs, specific materials, or unique specifications, our capabilities are engineered to deliver unparalleled precision and performance. 

As a leading custom coil manufacturer, our team has the expertise and deep knowledge required to produce the optimal electromagnetic coil solutions tailored to our customers. Reach out and see how our custom coil winding services can elevate your project. We look forward to speaking with you.

Contact Us





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    Quality Coils

    Quality Coils, Inc.

    748 Middle Street | Bristol, CT 06010

    Phone: 860.584.0927
    Fax: 860.584.5954


    Encapsulated Coils | Self-Supported Coils | Tape Wrapped Coils | Custom Coils | Toroid Coils

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