China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Hard disk drive magnets, also known as disk drive magnets, are primarily used in mechanical hard disks. Regarding them, you may have some knowledge you want to understand. This article compiles six common questions.
1. What material are hard drive magnets made of?
The vast majority of magnets from mechanical hard drives (HDDs) are sintered neodymium iron boron (NdFeB). Since the read/write heads require high-speed, precise positioning, high-energy-product materials must be used. Those who have disassembled a hard drive before should be familiar with this.
2. What is the magnetization direction of the hard disk's magnetic particles?
Unlike ordinary magnets, their magnetic poles aren't distributed across two surfaces but along a single surface—for example, transitioning gradually from north pole to south pole from left to right. For specific pole distribution details, refer to the article “Are hard drive magnets worth anything?”
3. Can hard drive magnets become demagnetized?
Under normal conditions, this rarely occurs. Potential causes for magnet demagnetization include exceeding the magnet's temperature tolerance, mechanical impact causing cracks, or exposure to strong opposing magnetic fields.
Although the strong magnet in the hard disk is a single piece, its surface exhibits a S-N polarity distribution.
4. What are some secondary uses for hard drive magnets?
Craft a DIY fish tank scraper using the super-strong magnets inside hard drives
Locate metal parts that have fallen on the ground
Demonstrate magnetic levitation
Create magnetic storage tools
5. Is the hard drive magnet rated N35?
Hard drive magnets are typically rated higher, at N38 or above. Compared to standard N35 magnets, they feature a higher surface magnetic field and stronger magnetic pull.
6. How to remove the powerful magnet from the hard drive?
The magnet is glued to the base. To remove it: use two pliers to pry the base at both ends, and the magnet will come out on its own. Do not use hard objects to pry directly, as this may cause breakage. You can also use adhesive remover or heat to loosen and detach it.
The above covers several common questions about disk drive magnets. Hard drive magnets are typically custom-made in curved shapes. If you have other inquiries or need to know magnet pricing, please send us an inquiry.
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