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neodymium magnets

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UMC 16x5/2x5 / N38 - cylindrical magnetic holder

cylindrical magnetic holder

Catalog no 320406

GTIN: 5906301814627

5

Diameter [±0,1 mm]

16 mm

internal diameter Ø [±0,1 mm]

5/2 mm

Height [±0,1 mm]

5 mm

Weight

5.5 g

Load capacity

4 kg / 39.23 N

Coating

[NiCuNi] nickel

3.33 with VAT / pcs + price for transport

2.71 ZŁ net + 23% VAT / pcs

bulk discounts:

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Lifting power along with form of a neodymium magnet can be verified using our force calculator.

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UMC 16x5/2x5 / N38 - cylindrical magnetic holder

Specification/characteristics UMC 16x5/2x5 / N38 - cylindrical magnetic holder
properties
values
Cat. no.
320406
GTIN
5906301814627
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter
16 mm [±0,1 mm]
internal diameter Ø
5/2 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
5.5 g [±0,1 mm]
Load capacity ~ ?
4 kg / 39.23 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.

Apart from their notable magnetism, neodymium magnets have these key benefits:

  • They do not lose their magnetism, even after approximately 10 years – the loss of lifting capacity is only ~1% (according to tests),
  • They are highly resistant to demagnetization caused by external magnetic sources,
  • The use of a polished silver surface provides a eye-catching finish,
  • They exhibit superior levels of magnetic induction near the outer area of the magnet,
  • These magnets tolerate extreme temperatures, often exceeding 230°C, when properly designed (in relation to profile),
  • The ability for precise shaping as well as customization to individual needs – neodymium magnets can be manufactured in many forms and dimensions, which amplifies their functionality across industries,
  • Wide application in cutting-edge sectors – they find application in hard drives, electromechanical systems, medical equipment or even high-tech tools,
  • Relatively small size with high magnetic force – neodymium magnets offer intense magnetic field in compact dimensions, which allows for use in compact constructions

Disadvantages of NdFeB magnets:

  • They are fragile when subjected to a powerful impact. If the magnets are exposed to physical collisions, it is suggested to place them in a protective case. The steel housing, in the form of a holder, protects the magnet from breakage and enhances its overall robustness,
  • They lose magnetic force at high temperatures. Most neodymium magnets experience permanent decline in strength when heated above 80°C (depending on the dimensions and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
  • Due to corrosion risk in humid conditions, it is wise to use sealed magnets made of protective material for outdoor use,
  • Using a cover – such as a magnetic holder – is advised due to the restrictions in manufacturing threads directly in the magnet,
  • Health risk from tiny pieces may arise, in case of ingestion, which is important in the protection of children. It should also be noted that tiny components from these assemblies have the potential to disrupt scanning after being swallowed,
  • Higher purchase price is one of the drawbacks compared to ceramic magnets, especially in budget-sensitive applications

Precautions

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 are primarily characterized by their significant internal force. They attract to each other, and any object that comes in their way will be affected.

Neodymium magnets bounce and clash mutually within a radius of several to almost 10 cm from each other.

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

Neodymium magnets produce 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 destroy devices like video players, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.

Neodymium magnetic are especially fragile, which leads to damage.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. Despite being made of metal and coated with a shiny nickel plating, they are not as hard as steel. At the moment of connection between the magnets, tiny sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Under no circumstances should neodymium magnets be brought close to GPS and smartphones.

Magnetic fields interfere with compasses and magnetometers used in navigation for air and sea transport, as well as internal compasses of smartphones and GPS devices.

The magnet coating is made of nickel, so be cautious if you have an allergy.

Studies show a small percentage of people have allergies to certain metals, including nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

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

Neodymium magnets are not toys. You cannot allow them to become toys for children. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

Neodymium magnets are over 10 times stronger than ferrite magnets (the ones in speakers), and their power can shock you.

Read the information on our website on how to properly utilize neodymium magnets and avoid significant harm to your body and unintentional disruption to the magnets.

Neodymium magnets should not be near people with pacemakers.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

Dust and powder from neodymium magnets are flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. Once crushed into fine powder or dust, this material becomes highly flammable.

Be careful!

In order to illustrate why neodymium magnets are so dangerous, read the article - How very dangerous are very powerful neodymium magnets?.

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