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UMS 20x8.6x4.5x7 / N38 - conical magnetic holder

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UMS 20x8.6x4.5x7 / N38 - conical magnetic holder

conical magnetic holder

Catalog no 220327

GTIN: 5906301814177

Diameter Ø [±0,1 mm]

20 mm

cone dimension Ø [±0,1 mm]

8.6x4.5 mm

Height [±0,1 mm]

7 mm

Weight

12 g

Magnetization Direction

↑ axial

Load capacity

6 kg / 58.84 N

Coating

[NiCuNi] nickel

6.46 ZŁ with VAT / pcs + price for transport

5.25 ZŁ net + 23% VAT / pcs

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Weight along with form of neodymium magnets can be tested on our modular calculator.

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UMS 20x8.6x4.5x7 / N38 - conical magnetic holder

Specification/characteristics UMS 20x8.6x4.5x7 / N38 - conical magnetic holder

properties

values

Cat. no.

220327

GTIN

5906301814177

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

20 mm [±0,1 mm]

cone dimension Ø

8.6x4.5 mm [±0,1 mm]

Height

7 mm [±0,1 mm]

Weight

12 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

6 kg / 58.84 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

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

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

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Advantages and disadvantages of neodymium magnets NdFeB.

Besides their durability, neodymium magnets are valued for these benefits:

They virtually do not lose strength, because even after ten years, the performance loss is only ~1% (based on calculations),
They remain magnetized despite exposure to magnetic noise,
Because of the lustrous layer of nickel, the component looks visually appealing,
Magnetic induction on the surface of these magnets is impressively powerful,
Thanks to their high temperature resistance, they can operate (depending on the shape) even at temperatures up to 230°C or more,
Thanks to the possibility in shaping and the capability to adapt to individual requirements, neodymium magnets can be created in different geometries, which broadens their usage potential,
Significant impact in cutting-edge sectors – they are utilized in data storage devices, rotating machines, clinical machines as well as sophisticated instruments,
Thanks to their power density, small magnets offer high magnetic performance, in miniature format,

Disadvantages of NdFeB magnets:

They can break when subjected to a powerful impact. If the magnets are exposed to physical collisions, they should be placed in a protective case. The steel housing, in the form of a holder, protects the magnet from breakage , and at the same time increases its overall robustness,
They lose magnetic force at increased temperatures. Most neodymium magnets experience permanent reduction 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,
Magnets exposed to humidity can oxidize. Therefore, for outdoor applications, we suggest waterproof types made of coated materials,
Limited ability to create internal holes in the magnet – the use of a magnetic holder is recommended,
Health risk due to small fragments may arise, in case of ingestion, which is significant in the protection of children. It should also be noted that small elements from these devices may disrupt scanning if inside the body,
Due to expensive raw materials, their cost is considerably higher,

Caution with Neodymium Magnets

Avoid bringing neodymium magnets close to a phone or GPS.

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.

Neodymium magnets can become demagnetized at high temperatures.

Although magnets are generally resilient, their ability to retain their magnetic strength can be influenced by factors like the type of material used, the magnet's shape, and the intended purpose for which it is employed.

Neodymium magnets are the strongest magnets ever created, and their power can shock you.

Make sure to review all the information we have provided. This will help you avoid harm to your body and damage to the magnets.

Neodymium magnetic are delicate as well as can easily break and get damaged.

Neodymium magnets are delicate as well as will break if allowed to collide with each other, even from a distance of a few centimeters. Despite being made of metal and coated with a shiny nickel plating, they are not as hard as steel. At the moment of collision between the magnets, tiny sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Neodymium magnets are not recommended for people with pacemakers.

Neodymium magnets generate strong magnetic fields. As a result, they interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

Keep neodymium magnets away from children.

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.

Dust and powder from neodymium magnets are highly 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.

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

Neodymium magnets produce intense magnetic fields that can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also damage videos, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

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, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.

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

If you have a finger between or alternatively on the path of attracting magnets, there may be a serious cut or a fracture.

Warning!

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