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UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

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UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180319

GTIN: 5906301813750

Diameter Ø [±0,1 mm]

36 mm

Height [±0,1 mm]

18 mm

Height [±0,1 mm]

8 mm

Weight

52 g

Load capacity

40 kg / 392.27 N

23.98 ZŁ with VAT / pcs + price for transport

19.50 ZŁ net + 23% VAT / pcs

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UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

Specification/characteristics UMGW 36x18x8 [M8] GW / N38 - magnetic holder internal thread

properties

values

Cat. no.

180319

GTIN

5906301813750

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

36 mm [±0,1 mm]

Height

18 mm [±0,1 mm]

Height

8 mm [±0,1 mm]

Weight

52 g [±0,1 mm]

Load capacity ~ ?

40 kg / 392.27 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 female thread can be versatile accessories, used across manufacturing and household applications, such as engineering. They consist of a magnetic core, usually neodymium, enclosed within a metal housing, covered with Zn layer for corrosion protection. The female thread, available in sizes from M4 to M8, allows mounting bolts, which simplifies installation of various items, such as signs, instruments, or lamps. They work thanks to a strong magnetic field, that focuses in the contact area, providing load capacity from 1.3 kg to 60 kg, depending on mount size. They are especially useful in the automotive industry, for example, for attaching car body components, and also in advertising, for hanging banners. Certain types have a rubber coating, e.g. in black or yellow, which protects surfaces from scratches and increases resistance to dampness. Benefits include great strength, ease of installation due to the internal threading, and the ability to transport heavy ferromagnetic objects. Still, the grip strength depends on surface thickness, material used, or distance between the holder and the component. Preventing mechanical shocks is crucial, as NdFeB magnets are brittle, and over-tightening the bolt can cause damage. In addition, a magnetic zone may interfere with electronics, such as smartphones or magnetic cards, so holders should be kept away from such equipment. Choosing mounts from trusted suppliers is advised, to guarantee reliability and safety during use.

Advantages as well as disadvantages of neodymium magnets NdFeB.

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

They have stable power, and over more than 10 years their attraction force decreases symbolically – ~1% (according to theory),
They show exceptional resistance to demagnetization from outside magnetic sources,
Thanks to the polished finish and nickel coating, they have an visually attractive appearance,
Magnetic induction on the surface of these magnets is very strong,
Neodymium magnets are known for very high magnetic induction and the ability to work at temperatures up to 230°C or higher (depending on the geometry),
The ability for accurate shaping as well as customization to individual needs – neodymium magnets can be manufactured in multiple variants of geometries, which extends the scope of their use cases,
Wide application in cutting-edge sectors – they serve a purpose in hard drives, electric drives, diagnostic apparatus or even sophisticated instruments,
Relatively small size with high magnetic force – neodymium magnets offer strong power in compact dimensions, which makes them ideal in small systems

Disadvantages of magnetic elements:

They are prone to breaking when subjected to a sudden impact. If the magnets are exposed to external force, it is suggested to place them in a steel housing. The steel housing, in the form of a holder, protects the magnet from damage , and at the same time reinforces its overall durability,
High temperatures may significantly reduce the field efficiency of neodymium magnets. Typically, above 80°C, they experience permanent deterioration in performance (depending on size). To prevent this, we offer heat-resistant magnets marked [AH], capable of working up to 230°C, which makes them perfect for high-temperature use,
Magnets exposed to wet conditions can degrade. Therefore, for outdoor applications, we recommend waterproof types made of coated materials,
The use of a protective casing or external holder is recommended, since machining threads in neodymium magnets is risky,
Potential hazard due to small fragments may arise, when consumed by mistake, which is notable in the family environments. It should also be noted that miniature parts from these assemblies can complicate medical imaging after being swallowed,
In cases of large-volume purchasing, neodymium magnet cost is a challenge,

Be Cautious with Neodymium Magnets

It is crucial not to allow the magnets to pinch together uncontrollably or place your fingers in their path as they attract to each other.

Magnets will attract each other within a distance of several to around 10 cm from each other. Don't put your fingers in the path of magnet attraction, as a major injury may occur. Depending on how massive the neodymium magnets are, they can lead to a cut or a fracture.

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

The strong magnetic field generated by neodymium magnets can destroy magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, or other devices. They can also destroy videos, televisions, CRT computer monitors. Do not forget to keep neodymium magnets at a safe distance from these electronic devices.

It is important to keep neodymium magnets away from youngest children.

Remember that 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 can demagnetize at high temperatures.

Although magnets have demonstrated their effectiveness up to 80°C or 175°F, the temperature can vary depending on the type, shape, and intended use of the specific magnet.

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

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.

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 should not be near 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 highly flammable.

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

Neodymium magnetic are extremely fragile, leading to their cracking.

In the event of a collision between two neodymium magnets, it can result in them getting chipped. They are coated with a shiny nickel plating similar to steel, but they are not as hard. 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.

Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times more powerful, and their strength 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.

Caution!

So you are aware of why neodymium magnets are so dangerous, read the article titled How dangerous are powerful neodymium magnets?.