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neodymium magnets

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UMC 32x11/3x8 / N38 - cylindrical magnetic holder

cylindrical magnetic holder

Catalog no 320409

GTIN: 5906301814658

5

Diameter [±0,1 mm]

32 mm

internal diameter Ø [±0,1 mm]

11/3 mm

Height [±0,1 mm]

8 mm

Weight

36 g

Load capacity

23 kg / 225.55 N

Coating

[NiCuNi] nickel

17.98 with VAT / pcs + price for transport

14.62 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 55 pcs
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UMC 32x11/3x8 / N38 - cylindrical magnetic holder

Specification/characteristics UMC 32x11/3x8 / N38 - cylindrical magnetic holder
properties
values
Cat. no.
320409
GTIN
5906301814658
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter
32 mm [±0,1 mm]
internal diameter Ø
11/3 mm [±0,1 mm]
Height
8 mm [±0,1 mm]
Weight
36 g [±0,1 mm]
Load capacity ~ ?
23 kg / 225.55 N
Coating
[NiCuNi] nickel
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N38

properties
values
units
coercivity bHc ?
860-915
kA/m
coercivity bHc ?
10.8-11.5
kOe
energy density [Min. - Max.] ?
287-303
BH max KJ/m
energy density [Min. - Max.] ?
36-38
BH max MGOe
remenance Br [Min. - Max.] ?
12.2-12.6
kGs
remenance Br [Min. - Max.] ?
1220-1260
T
actual internal force iHc
≥ 955
kA/m
actual internal force iHc
≥ 12
kOe
max. temperature ?
≤ 80
°C

Physical properties of NdFeB

properties
values
units
Vickers hardness
≥550
Hv
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

Shopping tips

Advantages and disadvantages of neodymium magnets NdFeB.

In addition to their pulling strength, neodymium magnets provide the following advantages:

  • They retain their attractive force for almost 10 years – the loss is just ~1% (based on simulations),
  • They are highly resistant to demagnetization caused by external magnetic sources,
  • In other words, due to the metallic silver coating, the magnet obtains an professional appearance,
  • They exhibit superior levels of magnetic induction near the outer area of the magnet,
  • Thanks to their exceptional temperature resistance, they can operate (depending on the geometry) even at temperatures up to 230°C or more,
  • Thanks to the freedom in shaping and the capability to adapt to unique requirements, neodymium magnets can be created in diverse shapes and sizes, which broadens their usage potential,
  • Significant impact in cutting-edge sectors – they are utilized in hard drives, rotating machines, diagnostic apparatus or even high-tech tools,
  • Thanks to their power density, small magnets offer high magnetic performance, with minimal size,

Disadvantages of neodymium magnets:

  • They are fragile when subjected to a strong impact. If the magnets are exposed to shocks, it is advisable to use in a protective case. The steel housing, in the form of a holder, protects the magnet from damage and increases its overall durability,
  • They lose strength at increased temperatures. Most neodymium magnets experience permanent reduction in strength when heated above 80°C (depending on the form and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
  • Magnets exposed to damp air can oxidize. Therefore, for outdoor applications, it's best to use waterproof types made of rubber,
  • The use of a protective casing or external holder is recommended, since machining multi-axis shapes in neodymium magnets is not feasible,
  • Safety concern due to small fragments may arise, especially if swallowed, which is significant in the context of child safety. It should also be noted that tiny components from these products may complicate medical imaging after being swallowed,
  • In cases of large-volume purchasing, neodymium magnet cost may be a barrier,

Safety Precautions

Neodymium magnets can become demagnetized at high temperatures.

Under specific conditions, Neodymium magnets may experience demagnetization when subjected to high temperatures.

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

In the situation of placing a finger in the path of a neodymium magnet, in that situation, a cut or a fracture may occur.

Keep neodymium magnets away from 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.

Dust and powder from neodymium magnets are highly flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Do not place neodymium magnets near a computer HDD, TV, and wallet.

Magnetic fields generated by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other similar devices. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

  Magnets are not toys, youngest should not play with them.

Remember that neodymium magnets are not toys. Do not allow children to play with them. In the case of swallowing multiple magnets simultaneously, they can attract to each other through the intestinal walls. In the worst case scenario, this can lead to death.

Neodymium magnets are the most powerful, most remarkable magnets on earth, and the surprising force between them can shock you at first.

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.

Magnets made of neodymium are particularly fragile, resulting in damage.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. They are coated with a shiny nickel plating similar to steel, but they are not as hard. In the case of a collision between two magnets, there can be a scattering of small sharp metal fragments in different directions. Protecting your eyes is essential.

If you have a nickel allergy, avoid contact with neodymium magnets.

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.

Never bring neodymium magnets close to a phone and GPS.

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

Safety precautions!

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

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tel: +48 888 99 98 98