How to confirm you receive the good magnets or the magnets are just what you ordered?
We provide all of customers with test reports issued by our QA department One is test reports for dimensions. which is easy to be understood. Another is demagnetization curve. which describes the magnetic property of magnetic material. and it is the most important index to describes magnetic material.
It contains Remanence field(Br). Normal Coercivity(Hcb). Intrinsic Coercivity(Hcj) and Max. Energy Products(B-H) max. If you only use the pull force or holding force of magnets. it is easy you do not need to consider the curve. just tell us how much pull force you want.
If you want the magnets to be applied in motor. high temperature(more than 80C) or other special environment(high temperature& humidity). you need to study and concern the curve carefully!
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Subsquent to Ferrite magnets and AiNiCo magnets,Neodymium Magnets as the third generation are the strongest magnets in the world due to the higher remanence.coercive force,and higher Max energy product.it even reaches 55MGOe.it is called N55
It is easily formed into varous sizes.and widely used in mini-motors.meters.sensors.sound device.magnetic suspension system.magnetic transmission machine and iatrical apparatus and other applications.It is prone to corrosion in humid environments.usually need surface treatment according to different applications. However.neodymium also has its disadvantage.
The following table belows shows the difference of neodymium magnets from other magnet material: |
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According to the different usage temperature.If you want magnet to be applied under 80'C, our 'N' grade is ok . if you want magnet to be applied under 120'C, our "H" grade is ok. If you want stronger magnetic field/magnetic flux or pull force. the bigger number of grade the stronger magnet. Under 80'C,N35Under 120°c.35H<38H<40H
So.the first step of ordering right magnet is to confirm what the operating temperature is then confirm the Magnetic Characteristics/Grades 1.See the diagram to choose what the working temperature you want.
Benefit from the better processability.neodymium blanks can be made to various shapes and sizes.
For examples: Block blanks can be cutted to various of different smaller sizes of block shapes:
Cylinder or Rod can be cutted to various of different smaller discs:
Cylinder or Rod can be drilled different sizes of holes firstly.then be cutted to different discs or cylinders:
Neodymium magnets are custom made products.no mater how many pieces, even though one piece.which is needed to be made tom the fist step to the final step. Except that we have the same size&grade&coating of magnets in our inventory by chance.
Different customer has the different demand for magnets, so the uniform catalogue is not available by us.
What you need to do is tell us what the sizes you want (we call it the second step)
Available Dimensions and Tolerance
