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UMGW 20x15x7 [M4] GW / N38 - magnetic holder internal thread

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UMGW 20x15x7 [M4] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180316

GTIN: 5906301813729

Diameter Ø [±0,1 mm]

20 mm

Height [±0,1 mm]

15 mm

Height [±0,1 mm]

7 mm

Weight

15.5 g

Load capacity

9 kg / 88.26 N

6.49 ZŁ with VAT / pcs + price for transport

5.28 ZŁ net + 23% VAT / pcs

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UMGW 20x15x7 [M4] GW / N38 - magnetic holder internal thread

Specification/characteristics UMGW 20x15x7 [M4] GW / N38 - magnetic holder internal thread

properties

values

Cat. no.

180316

GTIN

5906301813729

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

20 mm [±0,1 mm]

Height

15 mm [±0,1 mm]

Height

7 mm [±0,1 mm]

Weight

15.5 g [±0,1 mm]

Load capacity ~ ?

9 kg / 88.26 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

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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Neodymium magnetic mounts with internal thread are universal accessories, used in industrial and household uses, e.g. in automotive. They consist of a neodymium magnet, usually NdFeB, embedded in a steel shell, covered with zinc for corrosion protection. The internal thread, available in sizes from M4 to M8, enables mounting bolts, which facilitates installation of different components, like signs, tools, or lamps. They operate via a powerful magnetic zone, which concentrates at the mounting point, providing holding force ranging from one to sixty kilograms, depending on mount size. They are especially useful in vehicle manufacturing, for example, for securing car body components, as well as in marketing, for hanging banners. Certain types have a rubber coating, e.g. in black or yellow colors, which protects surfaces from scratches and increases resistance to dampness. Advantages cover high durability, ease of installation due to the internal threading, as well as the option to move massive steel components. However, the holding force depends on surface thickness, type of steel, and the gap between holder and object. It’s important to avoid impacts, since neodymium magnets are fragile, and over-tightening the bolt can cause damage. Moreover, a magnetic zone may interfere with electronics, such as smartphones or magnetic cards, therefore mounts should be stored away from those devices. It is recommended to choose holders from reputable manufacturers, to guarantee reliability and safety during use.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to immense power, neodymium magnets have the following advantages:

They do not lose strength over time - after about 10 years, their power decreases by only ~1% (theoretically),
They are highly resistant to demagnetization by external magnetic sources,
In other words, thanks to the glossy nickel, gold, or silver finish, the element gains an visually attractive appearance,
They exhibit very high magnetic induction on the surface of the magnet,
Magnetic neodymium magnets are characterized by very high magnetic induction on the surface of the magnet and can operate (depending on the shape) even at temperatures of 230°C or higher...
The ability for precise shaping or customization to specific needs – neodymium magnets can be produced in a wide range of shapes and sizes, which expands the range of their possible uses.
Significant importance in the industry of new technologies – find application in computer drives, electric motors, medical devices and various technologically advanced devices.

Disadvantages of neodymium magnets:

They can break when subjected to a strong impact. If the magnets are exposed to impacts, we recommend using magnets in a metal holder. The steel housing in the form of a holder protects the magnet from impacts, and at the same time increases its overall strength,
Magnets lose their strength due to exposure to high temperatures. In most cases, when the temperature exceeds 80°C, these magnets experience permanent loss in strength (although it is worth noting that this is dependent on the shape and size of the magnet). To avoid this problem, we offer special magnets marked with the [AH] symbol, which exhibit high temperature resistance. They can operate even at temperatures as high as 230°C or more,
Magnets exposed to a humid environment can corrode. Therefore, when using them outdoors, we recommend using waterproof magnets made of rubber, plastic, or other moisture-resistant materials,
Limited ability to create threads or complex shapes in the magnet - the use of a housing is recommended - magnetic holder
Potential hazard arising from small pieces of magnets pose a threat, in case of ingestion, which is crucial in the aspect of protecting young children. It's also worth noting that miniscule components of these magnets have the potential to be problematic in medical diagnosis after entering the body.

Handle with Care: Neodymium Magnets

Avoid contact with neodymium magnets 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 are over 10 times more powerful than ferrite magnets (the ones in speakers), and their strength can shock 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.

Keep neodymium magnets as far away as possible from GPS and smartphones.

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 can become demagnetized at high temperatures.

Whilst Neodymium magnets can lose their magnetic properties at high temperatures, it's important to note that the extent of this effect can vary based on factors such as the magnet's material, shape, and intended application.

Magnets will attract to each other, so remember not to allow them to pinch together without control or place your fingers in their path.

If the joining of neodymium magnets is not under control, then they may crumble and crack. Remember not to approach them to each other or hold them firmly in hands at a distance less than 10 cm.

Neodymium magnets are extremely fragile, they easily fall apart as well as can become damaged.

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, small sharp metal pieces can be propelled in various directions at high speed. Eye protection is recommended.

Under no circumstances should neodymium magnets be placed near a computer HDD, TV, and wallet.

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. 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, children should not play with them.

Neodymium magnets are not toys. Be cautious and make sure no child plays 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 significant injuries, and even death.

Neodymium magnets are not recommended for 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 flammable.

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

Warning!

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