Bunting-DuBois  

Bunting is a one-stop shop specializing in magnetic sub-assemblies. With our machining, magnet fabrication, and final assembly capabilities, we have the ability to provide finished assemblies to meet your customized needs. Our final processes (post assembly) include final grind, balancing, and field mapping allowing Bunting to deliver a quality driven and precision magnet assembly. Bunting has a “design for manufacturability” engineering team ready to discuss your product. We can reduce cost drivers and develop a repeatable manufacturing process to deliver a quality product.

Some of our most common assemblies include hub, rotor, and back-plate machining and assembly including potting, final grind, and balancing for Internal Permanent Magnet (IPM), Surface Permanent Magnet (SPM), and linear motor designs. We are the premier supplier of bonded magnets into the Brushless DC Motor (BLDC) market.

We are industry experts in high temperature samarium magnet assemblies typically including stainless steel encapsulation and welding for pressure and vibration downhole applications. We offer a wide variety of material grades which have a high strength-to-weight ratio and will not lose attractive force over time, unless otherwise damaged.

Our injection mold, insert mold, and overmold capabilities allow us to produce magnetic sub-assemblies in high volume to automotive production and quality standards. Our ISO 9001 certification is critical to the success of our automotive customers. Bunting can offer full level 3 PAPP documentation for all of your requirements.

Our clean assembly area includes component assembly with an option for glove box clean air assembly and an end-of-line pass/fail test. Bunting offers a wide selection of materials that meet your quality and precision standards while maintaining a competitive price.

Magnets created by injection molding have excellent geometric tolerance requiring minimal or zero secondary operations. Injection molding allows magnets to be designed in complex shapes without sacrificing other desirable traits, such as high electrical resistivity, strong mechanical properties, and the utilization of multipole magnetization. Injection molding is also used by Bunting to have a tailored flux output for given shapes and sizes of different magnets.

Two components are used to create basic bonded magnets: a non-magnetic polymer or elastomer binder and a magnetic powder. Injection molded magnets are created by injecting this molten, highly filled thermoplastic compound into mold cavities where it cools and solidifies. The magnetic element of this compound typically consists of ferrite and NdFeB (neodymium-iron-boron) powders. Mixing this magnetic material with a polymer allows for a magnetic compound to be created that can then be injection molded in the same way as any other thermoplastic. By using injection molding, the resulting magnet is able to have tight tolerances and other properties that can only be achieved through this method.

What You Can Expect From Bunting:
• 2D and 3D magnetic modeling of your design
• Rapid prototyping of designs
• Capacity to manufacture magnets and magnetic assemblies in any quantity
• Extensive quality checks of product
• On-time delivery

At Bunting, we engineer a custom magnet to fit your specific needs. We combine ingenuity, our deep expertise, and our dedicated range of equipment in order to deliver you the exact product you need with no sacrifice to quality design and engineering.