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neodymium magnets

We offer red color magnets Nd2Fe14B - our proposal. Practically all magnesy neodymowe on our website are in stock for immediate delivery (check the list). See the magnet price list for more details check the magnet price list

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UMS 75x19x10.5x18 / N38 - conical magnetic holder

conical magnetic holder

Catalog no 220405

GTIN: 5906301814245

5

Diameter Ø [±0,1 mm]

75 mm

cone dimension Ø [±0,1 mm]

19x10.5 mm

Height [±0,1 mm]

18 mm

Weight

465 g

Magnetization Direction

↑ axial

Load capacity

162 kg / 1588.68 N

Coating

[NiCuNi] nickel

125.56 with VAT / pcs + price for transport

102.08 ZŁ net + 23% VAT / pcs

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UMS 75x19x10.5x18 / N38 - conical magnetic holder

Specification/characteristics UMS 75x19x10.5x18 / N38 - conical magnetic holder
properties
values
Cat. no.
220405
GTIN
5906301814245
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
75 mm [±0,1 mm]
cone dimension Ø
19x10.5 mm [±0,1 mm]
Height
18 mm [±0,1 mm]
Weight
465 g [±0,1 mm]
Magnetization Direction
↑ axial
Load capacity ~ ?
162 kg / 1588.68 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 as well as disadvantages of neodymium magnets NdFeB.

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

  • They virtually do not lose power, because even after ten years, the performance loss is only ~1% (according to literature),
  • They are very resistant to demagnetization caused by external magnetic sources,
  • Thanks to the shiny finish and silver coating, they have an elegant appearance,
  • They exhibit superior levels of magnetic induction near the outer area of the magnet,
  • With the right combination of materials, they reach significant thermal stability, enabling operation at or above 230°C (depending on the form),
  • The ability for custom shaping as well as customization to specific needs – neodymium magnets can be manufactured in multiple variants of geometries, which enhances their versatility in applications,
  • Significant impact in new technology industries – they are used in computer drives, rotating machines, clinical machines as well as sophisticated instruments,
  • 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 powerful impact. If the magnets are exposed to shocks, we recommend in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from breakage while also increases its overall durability,
  • Magnets lose field strength when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible power drop (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,
  • Due to corrosion risk in humid conditions, it is wise to use sealed magnets made of plastic for outdoor use,
  • Using a cover – such as a magnetic holder – is advised due to the restrictions in manufacturing threads directly in the magnet,
  • Safety concern due to small fragments may arise, in case of ingestion, which is notable in the family environments. Furthermore, tiny components from these magnets have the potential to hinder health screening once in the system,
  • High unit cost – neodymium magnets are costlier than other types of magnets (e.g., ferrite), which can restrict large-scale applications

Exercise Caution with Neodymium Magnets

Magnets made of neodymium are delicate as well as can easily break as well as get damaged.

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

Neodymium magnets can become demagnetized at high temperatures.

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

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. Once crushed into fine powder or dust, this material becomes highly flammable.

Avoid bringing neodymium magnets close to a phone or GPS.

Intense magnetic fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

Neodymium magnets are among the strongest magnets on Earth. The surprising force they generate between each other can surprise 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.

 It is important to keep neodymium magnets out of reach 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.

The magnet coating contains nickel, so be cautious if you have a nickel 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.

Neodymium Magnets can attract to each other due to their immense internal force, causing the skin and other body parts to get pinched and resulting in significant swellings.

Magnets may crack or crumble with uncontrolled joining to each other. You can't approach them to each other. At a distance less than 10 cm you should have them very firmly.

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. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.

Under no circumstances should neodymium magnets be placed 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. You should especially avoid placing neodymium magnets near electronic devices.

Warning!

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

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e-mail: bok@dhit.pl

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