← previous

Product available shipping in 2 days!

MP 20x5x5 / N38 - neodymium magnet

ring magnet

catalog number 030186

5.0

external diameter Ø

20 mm [±0,1 mm]

internal diameter Ø

5 mm [±0,1 mm]

height

5 mm [±0,1 mm]

magnetizing direction

↑ axial

capacity ~

1.43 kg / 14.02 N

magnetic induction ~

275.98 mT / 2,760 Gs

max. temperature

≤ 80 °C

2.76 PLN gross price (including VAT) / pcs +

2.24 PLN net price + 23% VAT / pcs

bulk discounts:

need more quantity?

price from 1 pcs

2.24 PLN

2.76 PLN

price from 268 pcs

2.11 PLN

2.60 PLN

price from 983 pcs

1.97 PLN

2.42 PLN

Don't know what to buy?

Call us tel: +48 888 99 98 98 or contact us via form on the contact page. You can check the mass and the shape of neodymium magnets in our force calculator magnetic calculator

Orders placed by 2:00 PM will be shipped on the same business day.

Specification: ring magnet 20x5x5 / N38 ↑ axial

Characteristics: ring magnet 20x5x5 / N38 ↑ axial

Properties

Values

catalog number

030186

production / distribution

Dhit sp. z o.o.

country of origin

Poland / China / Germany

customs code

85059029

external diameter Ø

20 mm [±0,1 mm]

internal diameter Ø

5 mm [±0,1 mm]

height

5 mm [±0,1 mm]

magnetizing direction ?

↑ axial

capacity ~ ?

1.43 kg / 14.02 N

magnetic induction ~ ?

275.98 mT / 2,760 Gs

max. temperature ?

≤ 80 °C

coating type ?

[NiCuNi] nickel

weight

11.04 g

execution tolerance

± 0.1 mm

Magnetic properties of the material N38

material characteristics N38

Properties

Values

units

remenance Br [Min. - Max.] ?

12.2-12.6

kGs

remenance Br [Min. - Max.] ?

1220-1260

coercivity bHc ?

10.8-11.5

kOe

coercivity bHc ?

860-915

kA/m

actual internal force iHc

≥ 12

kOe

actual internal force iHc

≥ 955

kA/m

energy density [Min. - Max.]

36-38

BH max MGOe

energy density [Min. - Max.]

287-303

BH max KJ/m

max. temperature

≤ 80

°C

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B

Properties

Values

units

Vickers hardness

≥550

Density

≥7.4

g/cm³

Curie Temperature TC

312 - 380

°C

Curie Temperature TF

593 - 716

°F

Specific resistance

150

μΩ⋅Cm

Bending strength

250

Mpa

Compressive strength

1000~1100

Mpa

Thermal expansion parallel (∥) to orientation (M)

(3-4) x 106

°C^-1

Thermal expansion perpendicular (⊥) to orientation (M)

-(1-3) x 10-6

°C^-1

Young's modulus

1.7 x 104

kg/mm²

Neodymium magnets MP 20x5x5 / N38 in a ring form are regularly used in various industries due to their specific properties. Thanks to a powerful magnetic field of ${capacity} kg, which can be described as strength, they are extremely useful in applications that require high magnetic power in a relatively small area. Usage of MP 20x5x5 / N38 magnets include electrical mechanisms, generators, audio systems, and numerous other devices that use magnets for generating motion or storing energy. Despite their significant strength, they have a relatively low weight of ${weight} grams, which makes them more practical compared to heavier alternatives.

Choose recommended products

Product available shipping in 2 days!

magnetic separator with handle 25x225 / N52

615.00 PLN / pcs

Product available shipping in 2 days!

channel magnetic holder 40x13.5x5 / N38 ↑ axial

14.19 PLN / pcs

Product available shipping in 2 days!

magnetic separator 18x300 [2xM5] / N42

664.20 PLN / pcs

Product available shipping in 2 days!

magnetic holder with hook 75x18x68 [M8] / N38 ↑ axial

202.95 PLN / pcs

Advantages and disadvantages of neodymium magnets NdFeB.

Apart from immense power, neodymium magnets have the following advantages:

They do not lose their strength (of the magnet). After approximately 10 years, their power decreases by only ~1% (theoretically),
They protect against demagnetization caused by external magnetic field extremely well,
By applying a shiny coating of nickel, gold, or silver, the element gains an aesthetic appearance,
They exhibit extremely high magnetic induction on the surface of the magnet,
By using an appropriate combination of materials, they can achieve high thermal resistance, allowing them to operate at temperatures up to 230°C and above...
Due to the option of accurate forming or adaptation to individual needs – neodymium magnets can be produced in various forms and dimensions, which enhances their versatility in applications.
Wide application in modern technologies – find application in computer drives, electric motors, medical apparatus or very advanced devices.

Disadvantages of neodymium magnets:

They are fragile when subjected to a strong impact. If the magnets are exposed to impacts, we recommend using magnets in a steel housing. The steel housing in the form of a holder protects the magnet from impacts and at the same time increases its overall strength,
High temperatures can reduce the strength of neodymium magnets. Typically, after heating above 80°C, most of them experience a permanent loss in strength (although it is dependent on the form and size). To prevent this, we offer special magnets marked with the symbol [AH], which are highly resistant to high temperatures. They can operate even at temperatures up to 230°C, making them an ideal solution for applications requiring high-temperature operation,
Due to their susceptibility to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic, or other moisture-resistant materials when using them outdoors,
Limited ability to create threads or complex shapes in the magnet - the use of a housing is recommended - magnetic holder
Health risk arising from small pieces of magnets pose a threat, if swallowed, which is crucial in the context of children's health. It's also worth noting that small elements of these products have the potential to complicate diagnosis in case of swallowing.

Be Cautious with Neodymium Magnets

Keep neodymium magnets away from the wallet, computer, and TV.

Neodymium magnets generate intense magnetic fields that can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, etc. devices. They can also damage videos, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

The magnet is coated with nickel. Therefore, exercise caution if you have an allergy.

Studies clearly indicate a small percentage of people who suffer from metal allergies such as nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

Neodymium magnets can become demagnetized at high temperatures.

Although magnets have shown to retain their effectiveness up to 80°C or 175°F, this temperature may vary depending on the type of material, shape, and intended use of the magnet.

Neodymium magnets can attract to each other, pinch the skin, and cause significant injuries.

Neodymium magnets bounce and also clash mutually within a distance of several to around 10 cm from each other.

Neodymium magnets are the strongest magnets ever invented. Their power can shock you.

On our website, you can find information on how to use neodymium magnets. This will help you avoid injuries and prevent damage to the magnets.

Keep neodymium magnets away from youngest children.

Remember that neodymium magnets are not toys. Do not allow children to play with them. Small magnets can pose a serious choking hazard. If multiple magnets are swallowed, they can attract to each other through the intestinal walls, causing severe injuries, and even death.

Keep neodymium magnets away from GPS and smartphones.

Neodymium magnets are a source of intense magnetic fields that cause interference with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

Magnets made of neodymium are highly susceptible to damage, leading to breaking.

Neodymium magnets are characterized by considerable fragility. Neodymium magnetic are made of metal and coated with a shiny nickel, but they are not as durable as steel. At the moment of collision between the magnets, small metal fragments can be dispersed in different directions.

Neodymium magnets should not be near people with pacemakers.

Neodymium magnets produce strong magnetic fields that can interfere with the operation of a heart pacemaker. However, if the magnetic field does not affect the device, it can damage its components or deactivate the device when it is in a magnetic field.

Please read the article - What danger lies in neodymium magnets? You will learn how to handle them properly.

MP 20x5x5 / N38 - neodymium magnet

ring magnet

Specification: ring magnet 20x5x5 / N38 ↑ axial

Magnetic properties of the material N38

Physical properties of sintered neodymium magnets Nd2Fe14B

Choose recommended products

magnetic separator with handle 25x225 / N52

channel magnetic holder 40x13.5x5 / N38 ↑ axial

magnetic separator 18x300 [2xM5] / N42

magnetic holder with hook 75x18x68 [M8] / N38 ↑ axial

Advantages and disadvantages of neodymium magnets NdFeB.

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B