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Magnet Store South Africa

20x10x5mm N38 Ni Neodymium Block

20x10x5mm N38 Ni Neodymium Block

Regular price R 27.60 ZAR
Regular price Sale price R 27.60 ZAR
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 20x10x5mm N38 Ni Neodymium Block

Neodymium blocks are strong magnet and are very useful for hanging or holding square, rectangular or similar shaped metal objects as well as a wide range of other magnetic applications.

Rare earth neodymium magnets, also known as NdFeB magnets or Neo magnets, are made from an alloy of neodymium, iron and boron. They have excellent magnetic property and are extremely strong for their size. Neodymium magnets are permanent, and have a high maximum magnetic energy.



Material: Neodymium Magnets (NdFeB)
Dimensions: 20mm length x 10mm height x 5mm thickness
Shape: Block
QTY: 01 Pcs
Coating/Plating: Ni-Cu-Ni (Nickel) 
Grading: N38
Tolerance: +/- 0.1
Maximum temperature: N38 grading magnets can work in an environment that has a maximum operating temperature no greater than 80°C.
Pulling Force: 5.41kg
Colour: Silver
Direction of Magnetism: Through the thickness.

Image: Direction of magnetism


Pros and cons:

-Best power to weight ratio of all magnets.
-High resistance to demagnetization.

-Magnetism starts to decrease (and can be permanently lost) at 80°C. 
-Low corrosion resistance. (If the plating is damaged)
-Will rust when exposed to wet elements.
-Brittle (May break, crack, or chip upon sudden collisions with other magnets or metals.)
-Drilling magnets causes magnet to shatter. (Do not drill magnets as friction can cause fire / explosion due to flammable material.)
-Often higher cost choice.

Applications of Neodymium Magnet:

Acoustic field: the speaker, receiver, microphone, alarm, stage audio, car audio etc.
Electronics: permanent magnetic actuator vacuum circuit breakers, magnetic relays, meter sound meter, a reed switch, sensors.
Machinery and equipment: magnetic separation, magnetic crane, magnetic machinery.
Other industries: magnetized Wax, pipe descaling, magnetic fixture, automatic mah-jong machine, magnetic locks, doors and for windows magnetic, magnetic luggage, leather magnetic toys, magnetic tools, gifts, craft project, diy, jewelry, office and packaging.


Looking for custom sizing, coating, grading or bulk orders: Please contact us 0218513913 or 

Important warnings and tips for using magnets.

Please make sure you read and take care when using magnets.

How to separate magnets safely:
To separate magnets, use a sliding motion, never try pulling magnets apart as it will cause them to snap together causing injuries. If you have larger stronger magnets use a wooden table or desk and overhang one magnet. Apply strong downward pressure to separate magnet from the other magnets. Once separated, keep moving the magnet to a safe distance.

Magnets attract to each other handle with care:
If two magnets are placed loosely apart, they could leap together unexpectedly, with extreme speed and force, which could shatter and break both the magnets and could injure your finger if it is caught in between. Flying chips are sharp and could be a danger to your eyes. Handle only one magnet at a time.

Nickel Allergies:

Some of our magnets have a nickel coating. Prolonged contact with skin may cause irritation.

Warning for children using magnets:
DO NOT allow children to play with magnets unsupervised and do not allow children to handle stronger magnets as they are powerful and will cause injury and could be fatal if swallowed. Magnets are not toys!

Magnetic Sensitive Items:
-Media: Keep away from credit cards and other magnetically stored media.
-Pacemakers: Keep magnets away from pacemakers. The operation of heart pacemakers may be affected by the proximity of a magnet. Magnets can set a pacemaker working in a way that is not suitable for the user and that might affect their health.  

 For image illustrations click here

Magnet Store does not accept any responsibility for damaged caused by improper handling of these magnets. These magnets have a surprising amount of magnetic power and if handled incorrectly can be dangerous. With the purchase of these magnets, you confirm you have read and understood the following warnings. If you are giving magnets as a gift, please be sure to include this information sheet in the package.  
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