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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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Lifting power along with appearance of a neodymium magnet can be calculated on our force calculator.

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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 featuring female thread can be universal accessories, used in industrial and everyday applications, such as engineering. They contain a neodymium magnet, typically NdFeB, embedded within a steel shell, covered with Zn layer to prevent rusting. The internal thread, ranging from M3 to M10, enables mounting screws, which simplifies assembly of various components, like nameplates, tools, or lamps. They work thanks to a strong magnetic field, that focuses at the mounting point, ensuring holding force ranging from one to sixty kilograms, based on mounting dimensions. They are especially useful in vehicle manufacturing, e.g. for attaching car body components, and also in marketing, for poster placement. Certain types come with a rubber shell, e.g. in black or yellow, helping prevent surface damage and improves moisture resistance. Benefits include great strength, ease of installation due to the internal threading, as well as the option to move massive steel components. Still, the grip strength relies on surface thickness, type of steel, or distance between the holder and the component. Preventing mechanical shocks is crucial, as NdFeB magnets are brittle, and overtightening the screw may be dangerous. Moreover, 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 ensure high quality and safe use during operation.

Advantages as well as disadvantages of neodymium magnets NdFeB.

Apart from their strong magnetic energy, neodymium magnets have these key benefits:

They virtually do not lose power, because even after 10 years, the decline in efficiency is only ~1% (in laboratory conditions),
Their ability to resist magnetic interference from external fields is among the best,
Thanks to the glossy finish and gold coating, they have an visually attractive appearance,
They possess strong magnetic force measurable at the magnet’s surface,
These magnets tolerate elevated temperatures, often exceeding 230°C, when properly designed (in relation to form),
The ability for accurate shaping and adjustment to custom needs – neodymium magnets can be manufactured in multiple variants of geometries, which amplifies their functionality across industries,
Important function in cutting-edge sectors – they find application in data storage devices, electromechanical systems, diagnostic apparatus as well as technologically developed systems,
Thanks to their concentrated strength, small magnets offer high magnetic performance, while occupying minimal space,

Disadvantages of rare earth magnets:

They are prone to breaking when subjected to a sudden impact. If the magnets are exposed to external force, we recommend in a protective case. The steel housing, in the form of a holder, protects the magnet from fracture , and at the same time increases its overall durability,
High temperatures may significantly reduce the strength of neodymium magnets. Typically, above 80°C, they experience permanent loss in performance (depending on shape). 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,
They rust in a wet environment, especially when used outside, we recommend using encapsulated magnets, such as those made of plastic,
Using a cover – such as a magnetic holder – is advised due to the challenges in manufacturing fine shapes directly in the magnet,
Possible threat due to small fragments may arise, if ingested accidentally, which is crucial in the family environments. Furthermore, small elements from these products can disrupt scanning when ingested,
In cases of tight budgets, neodymium magnet cost is a challenge,

Be Cautious with Neodymium Magnets

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.

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.

Neodymium magnets can become demagnetized at high temperatures.

Despite the general resilience of magnets, 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.

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

Neodymium magnets produce strong magnetic fields that 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 devices like video players, televisions, CRT computer monitors. Remember not to place neodymium magnets close to these electronic devices.

Magnets made of neodymium are especially fragile, which leads to their breakage.

Neodymium magnetic are delicate as well as will shatter if allowed to collide with each other, even from a distance of a few centimeters. 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.

Neodymium magnets are among the most powerful magnets on Earth. The astonishing force they generate between each other can shock you.

Familiarize yourself with our information to correctly handle these magnets and avoid significant swellings to your body and prevent damage to the magnets.

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

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

Keep neodymium magnets away from GPS and smartphones.

Neodymium magnets generate strong magnetic fields that interfere with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

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

Neodymium magnets are not toys. You cannot allow them to become toys for children. In the case of small magnets, they can be swallowed and cause choking. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to 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. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.

Safety rules!

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