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Custom Coil Manufacturers and Suppliers

IQS Directory provides a comprehensive list of custom coil manufacturers and suppliers. Use our website to review and source top custom coil manufacturers with roll over ads and detailed product descriptions. Find custom coil companies that can design, engineer, and manufacture custom coils to your company’s specifications. Then contact the custom coil companies through our quick and easy request for quote form. Website links, company profile, locations, phone, product videos and product information is provided for each company. Access customer reviews and keep up to date with product news articles. Whether you are looking for manufacturers of ignition coils, toroidal coils, field coils, or custom coils of every type, this is the resource for you.

  • Sag Harbor, NY 800-724-5952

    Sag Harbor Industries specializes in having the ability to produce custom coils to our customers' exact orders. Our full assortment of automated coil winding machines produce coils with precision, efficiently and economically. We make coils for an array of industries, and types include electric, encapsulated ,field, molded, self supported, solenoid, and varnished.

  • Antigo, WI 800-826-9741

    Johnson Electric Coil Company is a family owned manufacturer that specializes in custom transformers, coils and inductors. From three phase isolation transformers to single phase inductors and chokes, we carefully design our products to meet your exact specifications. Our experienced engineers are available to assist during every step of the process. Let Johnson make great parts for you!

  • Tacoma, WA 253-324-3044

    PolyTech Coil Winding consistently meets the prototype and production needs of companies developing products for inertial navigation equipment, earthquake detection seismometers, virtual reality headsets, MRI coils, bioengineering implants, transformers, musical instruments and the list goes on. We custom design and fabricate any electric coils for domestic and international companies.

  • Schiller Park, IL 847-671-1333

    Communication Coil, Inc. has been designing and producing high reliability Filter Networks, RF Coils, Chokes, Inductors, Baluns, Toroids, Toroidal Transformers and Power Magnetics since 1944 to high-exacting standards for communications and signal processing in military, industrial, avionics, satellite, telemetry, marine, GPS and commercial applications.

  • South Haven, MI 269-637-5201

    South Haven Coil has been manufacturing superior quality electromagnetic products since 1957,all made 100% in the USA. We are one of the nation's leading quality electromagnet manufacturer's.Specializing in electromagnets, wire harnesses & termination, molded coil assemblies,potted coils, bobbin-wound coils, toroids,laminated & ferrite transformers.We strive to deliver dock-to-stock components, on time and within budget.

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businessIndustry Information

Custom Coils

A coil, in the context of electrics, is an electrical conductor such as a wire in the shape of a coil, spiral or helix. These coils are used in applications where electric currents interact with magnetic fields. They are used in devices such as inductors, electromagnets, transformers and sensor coils. Custom coils meet the vast variations of requirements in the market. This market includes industries and applications such as: medical systems, energy storage, power generation, semiconductor equipment processing, solar energy, environmental engineering, security and detection and university research.

What types of coils may a customer choose from to create custom coils? Coils can be classified both by the frequency of the current they are designed to work with and by their function. Coils may be direct current (DC), meaning they operate with a steady, or direct, current in their windings. Or, they may be audio frequency (AF), operating with alternating currents in the audio frequency range, which is less than 20 kHz. Finally, coils may be of the radio frequency (RF) type, which operates with alternating currents in the radio frequency range, which is above 20 kHz. The main types of coils, classified by their function, are: electromagnets, inductors, transformers and transducer coils. Electromagnets are coils that generate a magnetic field for an external purpose, often in order to exert a mechanical force onto something. Inductors, also called reactors, are coils that generate a magnetic field that interacts with the coil itself, in order to induce a back EMF. This EMF opposes changes through the coil, which makes the coil temporarily store energy or resist changes in currents. Coils that fall under the transformer blanket are devices that have two or more magnetically coupled windings, or sections of a single winding. In order to work, the primary winding, which is a time varying current in one coil, generates a magnetic field, which in turn induces a voltage in the other coil, called the secondary winding. Finally, transducer coils are used to translate time-varying magnetic fields into electric signals, and vise versa. An example of this is a loop, or radio, antenna, which converts radio waves to electric currents.

Aside from type, when designing custom coils, a customer may select its form material, wire material, wire coiling process, wire type and coil shape, among others. Custom coil wire material options include copper and aluminum, and the processes by which this wire may be formed include: single layer, multi-layer, dry/epoxy wound, random layer, precision winding, self-bonding, manual and automated. The wire type possibilities of custom coils are: insulated magnet, bare magnet, hollow core, solid core and tube. Coil shapes include: round, square, rectangular, oval, three-dimensional and other custom shapes. Aside from these, custom coils may be differentiated by their testing capabilities, applications, coil form materials, terminations, diameter and insulators.

Self-Supported CoilsTransfer Molded and Injection Molded Coils
Self-Supported Coils - Sag Harbor Industries, Inc.Transfer Molded and Injection Molded Coils - Sag Harbor Industries, Inc.