Compare compression molded magnets and injection molded magnets by magnetic strength, shape freedom, mechanical integration, tooling cost, and OEM application fit.

A gear position sensor is one of those parts you never think about until it fails. Then your transmission will not shift, your car may not start, and the check engine light can turn on. A faulty gear position sensor can lead to difficulties in transmission shifting or even render the car unable to start. For engineers and procurement teams designing or sourcing these sensors, the magnet inside is where signal quality starts. And it’s where most problems start, too. We build injection-molded magnets for gear position sensors every day, so we’ve seen firsthand what separates a magnet that works from one that works well. Let’s break it down. What Does a Gear Position Sensor Actually Do? The gear position sensor detects the position of the gear, such as first or second, and sends the data as an electric signal to the ECU. That signal tells the vehicle’s computer what gear you’re in so it can manage engine timing, fuel injection, and shift logic. Most modern designs are non-contact, meaning no mechanical wear points. How Hall Effect Magnets Make Gear Detection Work Hall elements are used as the magnetic sensor. When an external magnetic field is applied to the electrified semiconductor, the Lorentz force generates an electric […]

If you’re sourcing magnetic assemblies for a motor, sensor, or industrial device, you already know the magnet alone isn’t the whole story. The assembly around it, such as the housing, flux-conducting parts, and bonding method, determines whether your end product actually performs as intended. Understanding the nuances of magnetic assemblies is critical for optimizing product performance and reducing long-term costs for buyers. In this guide, we explore what magnetic assemblies are, where they are used, and how to select the right one for your specific application. What Exactly Is a Magnetic Assembly? Magnetic assemblies combine magnets with other materials and components, enhancing or directing magnetic properties to serve specific functions. In plain terms, you’re pairing a permanent magnet such as NdFeB, ferrite, or SmCo with steel housings, plastic enclosures, adhesives, or other components to focus the magnetic field exactly where you need it. Beyond just mechanical protection, another major purpose of magnetic assemblies is increasing magnetic strength. Compared with pure magnets under the same magnetic strength requirement, assemblies offer more obvious cost advantages and typically generate much higher attractive force due to flux-conducting parts that form an integral part of the magnetic circuit. That’s the real reason engineers don’t just buy standalone magnets. […]

Learn how injection molded magnets support overmolding and insert molding in sensor assemblies, including material choice, insert retention, air-gap control, magnetization, validation, and RFQ requirements.