Frequently Asked Questions (FAQ)
Find quick answers to the most common questions about our magnetic assemblies, custom magnets, quality standards, certifications, and services. Whether you’re looking for technical details or need help with your order, our FAQ section is here to guide you.
FAQs
What are the Differences Between Electromagnet and Permanent Magnet?
A permanent magnet retains its magnetism over time without the need for an external power source, while an electromagnet requires electricity to generate a magnetic field. Electromagnets can be turned on and off, whereas permanent magnets provide a constant magnetic force.
What are the Materials Used for Producing Permanent Magnets?
Common materials include ferrite (ceramic), alnico (aluminum, nickel, cobalt), samarium cobalt, and neodymium iron boron (NdFeB). Each material offers different magnetic strengths and thermal resistance.
Are Rare Earth and Neodymium Magnets the Same?
Neodymium magnets are a type of rare earth magnet. Rare earth magnets also include samarium cobalt magnets. Neodymium magnets are the strongest and most widely used among them.
What is the Strongest Type of Magnet?
Neodymium (NdFeB) magnets are the strongest commercially available permanent magnets. They offer a high magnetic field and strong resistance to demagnetization.
What Do You Mean by Magnetic Poles?
Magnetic poles are the two ends of a magnet where the magnetic force is strongest—designated as north (N) and south (S). Opposite poles attract, while like poles repel each other.
How Can You Identify the Magnet’s Pole?
You can identify poles using a compass (the north end will be attracted to the magnet’s south pole) or by using another known magnet and observing attraction or repulsion.
What Does the “N” in the Neodymium Magnet Mean?
The “N” stands for neodymium, followed by a number (e.g., N52) which indicates the magnet’s maximum energy product (strength). Higher numbers mean a stronger magnet.
What are the Production Processes of a Magnet?
The process typically includes raw material preparation, alloy melting, powder milling, pressing in a magnetic field, sintering, machining, coating, and magnetizing.
What is the Typical Magnet Tolerance?
Standard dimensional tolerance for magnets is typically ±0.1 mm, though it can vary depending on size, shape, and production method. Custom tolerances are available upon request.
What are the Materials that Magnet Can Attract?
Magnets attract ferromagnetic materials such as iron, nickel, cobalt, and some alloys. They do not attract non-metallic or non-ferrous materials like wood, plastic, or aluminum.
Can You Block or Shield a Magnetic Field?
While you cannot completely block a magnetic field, you can redirect it using materials like mu-metal or other high magnetic permeability materials to shield sensitive equipment.
How Long Does a Neodymium Magnet Last?
Neodymium magnets can retain their magnetic properties for decades. Under normal conditions, they lose about 1% of their strength every 10 years, assuming no physical or thermal damage.
What are the Different Factors that Can Reduce a Magnet’s Performance?
Factors include high temperatures, physical damage, exposure to opposing magnetic fields, corrosion (if not coated), and aging over time.
