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This is a round hole magnet with an outer diameter of 70mm, an inner diameter of 32mm, and a thickness of 15mm. The material is sintered ferrite, anisotropic, and the surface is uncoated. It is mainly used for speakers, speakers, and thickness magnetization.
At present, the magnets on the speakers mainly include sintered neodymium magnets and ceramic ferrite magnets. The magnetic properties of ferrites are relatively poor, and a certain volume is required to meet the driving force of the speakers, so they are generally used in larger audio speakers.
Rare earth magnetic materials (such as NdFeB), the magnetizing flux is much larger than that of ferrite, so using NdFeB magnets does not require a large diameter, so NdFeB is mostly used for small volume speakers, such as automobiles Audio.
For the same magnetic material, the larger the diameter, the saturation of magnetization, the greater the magnetic field strength, the greater the power of the speaker, the higher the sensitivity of the speaker, and the better the transient response.
Speaker magnets of other sizes;
Introduction of relevant horn magnets;
Is the magnet used in the speaker sintered NdFeB or bonded NdFeB?
How to select horn speaker magnet? It will help you after reading
Ferrite grade, sintered ferrite magnetic property parameter table
NdFeB magnet grade, Sintered neodymium magnet performance grade parameter table
Neodymium(Ndfeb) Magnet Material Safety Data Sheet
Sintered Ferrite Material Safety Data Sheet Pdf
Magnetic properties grade parameters of smco rare earth magnets
This product is a square ceramic magnet, made of sintered ferrite anisotropy, with low remanence, low recovery magnetic permeability, and strong anti-demagnetization ability. 12mm, suitable for fitness equipment, massager, magnetic control machine, air pump, if you are interested in this product, please contact....
You are now viewing this is a super small (tiny) size ferrite block magnet sample, high performance grade Y30, magnet length 2.45mm, width and thickness are 1mm, magnetization direction along the length....
This product is a variety of isotropic ferrite (Y10) rotor magnets ring, which are processed and manufactured by the Chinese permanent magnet supplier Courage Magnet. The inner aperture size of the magnet is 5.4mm, and the surface is smooth and free of defects. It can be magnetized according to the number of magnetic poles required by customers, such as radial 2, 4, 6, and 8 poles...
This product is a float switch magnet, a float ring magnet, and the material is ferrite. Drinking system, etc.), industrial equipment (such as: air oil compressor, air cooler, drain, lubricating oil system), gardening equipment, medical equipment, beauty salon equipment, aquaculture and industrial water purification, sewage treatment system, automatic door control system, Automotive and other industries....
This product is a cut ferrite square magnet, rectangular, Y30BH grade, side magnetized, mainly used for door sensor alarms, dry yellow tubes, the size is 25mm in length, 9mm in width, and 7mm in thickness. If you need this sample or want To understand the price, please send us an inquiry....
Note that this is not a NdFeB magnet. From the outside, it is indeed the same as a neodymium magnet, but in fact it is made of ferrite with a coating on the surface for magnetic therapy, such as knee pads, waist pads, neck pads, shoes, Pillow can be used, the picture below shows its magnetic force, the highest is about 800 Gauss....
This product is a ferrite magnet with a counterbore. The difference from ferrite ring magnets is the hole in the middle. The counterbore is mainly used with screws. Due to magnetism and processing problems, most of them choose neodymium iron. Boron counterbore instead, if you need to buy this counterbore ceramic magnet, welcome to communicate with us....
This product is a square ceramic ferrite magnet, magnetic grade is Y30, size is length 50mm, width 50mm, thickness 25mm, thickness direction magnetization. The place of production is Dongguan, China. It is mainly used for industry, machinery and equipment, and personal experiments, if you need it Please contact us to purchase this magnet, the minimum order quantity is 10 pcs....