The specifications of magnets can be divided into: N40, N42, N45, N48, N50, N52 nine kinds.
The magnetism of the magnet, according to its magnetic strength is divided into:
1. Strong magnet: including rare earth strong magnetic, NdFeb and so on.
The general performance of this magnet is relatively high, widely used in toys, packaging boxes, lamps, crafts, horns, medical machinery, health products, electronic products, hardware tools and other products, generally N33, N35, N38 is appropriate.
2. Permanent magnet.
Most of the factories use fixed letters to represent different magnets, such as the most common N35 magnet, N represents the magnet is NdFeb, Y represents permanent magnet ferrite, if it is PCx, such as PC40, it is a soft magnetic ferrite with high permeability.
3. Magnet with high temperature resistance.
Such as 38SH, it is a 150-degree magnet, and the magnetic force is equivalent to N38 at normal temperature. It should be mentioned here that at the same 70 degree temperature, 38SH working performance is much better than N38, of course, it should not be said that 90 degrees 100 degrees, Ndfeb magnet is the most avoid high temperature, N grade magnet maximum 80 degrees high temperature.
Magnetic material grades are: N30 ~ N52; 30H ~ 50H; 30SH to 50SH; 28UH ~ 40UH; Such as 30EH to 35EH.
1) There are no letters after the data, for example: N35 temperature resistance is generally ≤80℃
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2) Data end with M, for example: N50M temperature tolerance is generally ≤100℃
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3) The end of the data is H, for example: N48M temperature resistance is generally ≤120℃
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4) The end of the data is SH, for example: N45SH temperature is generally ≤150℃
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5) Data ending with UH, for example: N35UH temperature generally ≤180℃
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6) End with EH after the data, for example: N50M temperature tolerance is generally ≤200℃
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7) End with EH after the data, for example: N50M temperature tolerance is generally ≤220℃
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The latter five properties are high-temperature resistant, if once the specified temperature behind the magnet will be demagnetized.
Students, today we are going to discuss:
There are many magnets, common ferrite, electromagnet, Ndfeb, samarium cobalt and rubber magnetic and so on! Among them, the strongest magnetic force and the most commonly used is NdFeb, and its model is divided into N series, such as N35 and so on! H series, such as 35H 38H, etc. There are also M series, SH series, UH series, EH series, AH series with T series of low weightlessness magnets and so on! The standard of Ndfeb magnetic force: the standard that affects the largest aspect of the magnet is the model and specification, of which the model is remanent magnetic. The standard specifications of the stranding force and temperature bearing capacity will also affect the magnetic force, for example, within a certain magnetic range, the diameter charge is very axial charge its required specifications are not the same as some multi-pole charge specifications, more stringent! The specific data depends on what your magnet is used for, so that there is a way to get the type and specifications of the magnet you need.
Magnet suction calculation formula: magnet volume × density ×600 (multiple)
First, magnet density: the density of N35 is about 7.5 grams\/cubic centimeter. Understand the density of magnets recommended reading: \"Ferrite, injection magnetic, sintered NdFeb, bonded Ndfeb density is what?\"
Second, magnet weight: volume × density (30mm×15mm×5mm) ×0.0075=16.875 grams
Third, magnet suction: 16.875×600=10125 grams
It can be seen that a 30mm×15mm×5mm square magnet can pick up about 10.125kg of material.