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Hard Disk Drive Actuator Motor NdFeB Magnets, Magnetic Hard Disk, Hard Drive Disk Actuator Permanent Magnets, Hard Drive NEO HDDs Magnets, Hard Drive Neodymium Magnets, Hard Drive Rare Earth NdFeB Magnets, Salvage Neodymium Magnets China Manufacturer
Hard Disk Drive Actuator Motor NdFeB Magnets – HSMAG offers neodymium hard drive magnets in segment, block and disc. These neodymium iron boron magnets are widely used for hard drive actuator motors, HDD applications.
• Neodymium magnets are the most powerful commercially produced magnets.
• Neodymium magnets are hard and brittle and may chip or break if dropped.
• Neodymium hard drive magnets are magnetized through the thickness.
• Nickel coated neodymium magnets may corrode in humid conditions.
• Operating temperatures vary among material grades. For a comparison of neodymium material grades, please visit our chart of material properties.
• Neodymium magnets are often assembled into products using strong adhesives such as Loctite 325. Make sure that all contact surfaces are clean and dry prior to bonding.
• Please use caution when handling magnetized neodymium magnets, their exceptional magnetic force may cause them to attract to metal (or to each other) so strongly that fingers in their path could prove painful.
Neodymium magnets are the strongest in the world, that’s why they can be pricey. If you have an old hard drive (one you won’t ever need again), you can dismantle it to retrieve the neodymium magnets inside. Here I will give you a step-by-step guide for taking apart a computer hard drive.
Over the past 50 years, areal densities for HDD media have increased by an astonishing factor of 70 million. This remarkable achievement has been made possible by scaling the grain size in the media with the bit size, thus keeping the number of grains per bit approximately constant and maintaining a sufficient SNR. However, if the average grain volume is continually reduced without innovations in the media design, grains will become susceptible to superparamagnetic effect. This effect results in information loss, and will be a limiting factor for areal densities in conventional media. One approach to delaying the onset of the superparamagnetic effect is to use patterned bit media, wherein each bit is a single magnetic switching volume and is produced using a lithographic process. Two forms of such media have already been discussed in this chapter, DTM and BPM. In DTM, the tracks are separated physically and magnetically by grooves defined through lithography (with the most likely candidates being EBL or nanoimprint). While the track widths are lithographically defined through this process, the along track bit transitions are still defined by the field gradient from the write head as in conventional magnetic recording. Regions between tracks should be either nonmagnetic or recessed from the head such that the read element senses little or no magnetic response from them. HDD Head-Actuator Rare Earth Sintered Neodymium Magnet
This approach reduces the problem of poorly written and partially erased information at the edges of the track, which is a significant source of noise. Thus, by using discrete tracks, the read head can be made wider and comparable to the write head width, as the so-called side reading is no longer an issue. By eliminating this noise, somewhat higher areal densities may be accomplished. In addition, with the track widths physically defined in the media, the requirements on head tolerances may be eased, thus improving manufacturing yield. Unfortunately, the bit transition is still determined by the reversal of magnetization direction in adjacent grains, making DTM susceptible to many of the same areal density limitations as continuous media.
We carry a wide range of hard drives Neo magnets (100% industrial precision magnets) in various grades and sizes. If you require other design, it is OK, please contact us for more informantion.
We can supply OEM for you!