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neodymium magnets

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UI 17.5x5 [C310] / N38 - badge holder

badge holder

Catalog no 150261

GTIN: 5906301813583

5

Diameter Ø [±0,1 mm]

17.5 mm

Height [±0,1 mm]

5 mm

Weight

0.11 g

Load capacity

0.75 kg / 7.35 N

1.32 with VAT / pcs + price for transport

1.07 ZŁ net + 23% VAT / pcs

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UI 17.5x5 [C310] / N38 - badge holder

Specification/characteristics UI 17.5x5 [C310] / N38 - badge holder
properties
values
Cat. no.
150261
GTIN
5906301813583
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
17.5 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
0.11 g [±0,1 mm]
Load capacity ~ ?
0.75 kg / 7.35 N
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

The most recommended holders for ID badges include options such as this UI 17.5x5 [C310] / N38. They offer resilience and an aesthetic appearance. Magnetic mounts are acknowledged as ideal because they protect clothing, are easy to install, and provide strong badge attachment. A model utilizing powerful neodymium magnets and high-quality adhesive tapes, such as 3M tape, is especially recommended.
No!, magnetic holders are not recommended for individuals with heart implants, as the strong magnetic field may interfere with their functioning. In such cases, it is advised to use alternative fastening methods, and we offer two such types in our range.

Advantages as well as disadvantages of neodymium magnets NdFeB.

Apart from their strong holding force, neodymium magnets have these key benefits:

  • They retain their attractive force for almost ten years – the loss is just ~1% (in theory),
  • They are highly resistant to demagnetization caused by external field interference,
  • By applying a reflective layer of nickel, the element gains a clean look,
  • They have exceptional magnetic induction on the surface of the magnet,
  • They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
  • Thanks to the flexibility in shaping and the capability to adapt to specific requirements, neodymium magnets can be created in different geometries, which broadens their usage potential,
  • Key role in new technology industries – they find application in HDDs, rotating machines, healthcare devices or even technologically developed systems,
  • Compactness – despite their small size, they deliver powerful magnetism, making them ideal for precision applications

Disadvantages of neodymium magnets:

  • They may fracture when subjected to a heavy impact. If the magnets are exposed to physical collisions, they should be placed in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from damage while also increases its overall resistance,
  • Magnets lose magnetic efficiency when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible field weakening (influenced by the magnet’s dimensions). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
  • They rust in a moist environment. For outdoor use, we recommend using waterproof magnets, such as those made of non-metallic materials,
  • Limited ability to create internal holes in the magnet – the use of a external casing is recommended,
  • Possible threat related to magnet particles may arise, in case of ingestion, which is crucial in the context of child safety. Moreover, minuscule fragments from these products might hinder health screening after being swallowed,
  • Due to a complex production process, their cost is considerably higher,

Handle with Care: Neodymium Magnets

The magnet coating contains nickel, so be cautious if you have a nickel 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, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

 Keep neodymium magnets far from children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. Small magnets pose a serious choking hazard or can attract to each other in the intestines. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.

Keep neodymium magnets away from people with pacemakers.

Neodymium magnets generate strong magnetic fields. As a result, they interfere with the operation of a pacemaker. This is because many of these devices are equipped with a function that deactivates the device in a magnetic field.

Magnets made of neodymium are extremely fragile, they easily crack as well as can crumble.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. Despite being made of metal as well as coated with a shiny nickel plating, they are not as hard as steel. 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.

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

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

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

Strong 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. They can also damage televisions, VCRs, computer monitors, and CRT displays. You should especially avoid placing neodymium magnets near electronic devices.

Neodymium magnets are among the strongest magnets on Earth. The astonishing force they generate between each other 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 damage to the magnets.

Neodymium magnets can demagnetize at high temperatures.

Even though magnets have been found to maintain their efficacy up to temperatures of 80°C or 175°F, it's essential to consider that this threshold may fluctuate depending on the magnet's type, configuration, and intended usage.

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.

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.

Caution!

To raise awareness of why neodymium magnets are so dangerous, see the article titled How dangerous are powerful neodymium magnets?.

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e-mail: bok@dhit.pl

tel: +48 888 99 98 98