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UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread

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UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180317

GTIN: 5906301813736

Diameter Ø [±0,1 mm]

25 mm

Height [±0,1 mm]

17 mm

Height [±0,1 mm]

8 mm

Weight

25.4 g

Load capacity

17 kg / 166.71 N

11.91 ZŁ with VAT / pcs + price for transport

9.68 ZŁ net + 23% VAT / pcs

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UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread

Specification/characteristics UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread

properties

values

Cat. no.

180317

GTIN

5906301813736

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

25 mm [±0,1 mm]

Height

17 mm [±0,1 mm]

Height

8 mm [±0,1 mm]

Weight

25.4 g [±0,1 mm]

Load capacity ~ ?

17 kg / 166.71 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 internal thread can be universal accessories, used across manufacturing and household applications, e.g. in construction. They consist of a magnetic core, typically NdFeB, embedded within a metal housing, covered with zinc to prevent rusting. The female thread, ranging from M3 to M10, enables mounting screws, which facilitates assembly of various components, such as signs, instruments, or lamps. They operate thanks to a strong magnetic field, that focuses in the contact area, ensuring holding force from 1.3 kg to 60 kg, based on mounting dimensions. They are especially useful in the automotive industry, for example, for securing body panels, and also in marketing, for poster placement. Some models come with a rubber shell, e.g. in black or yellow, which protects surfaces from scratches and improves moisture resistance. Benefits include great strength, ease of installation thanks to the thread, and the ability to transport heavy ferromagnetic objects. However, the holding force depends on surface thickness, type of steel, or distance between the holder and the component. Preventing mechanical shocks is crucial, since neodymium magnets are fragile, 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 and disadvantages of neodymium magnets NdFeB.

In addition to their tremendous magnetic power, neodymium magnets offer the following advantages:

They virtually do not lose strength, because even after 10 years, the decline in efficiency is only ~1% (according to literature),
They are highly resistant to demagnetization caused by external magnetic sources,
Thanks to the polished finish and silver coating, they have an elegant appearance,
They have exceptional magnetic induction on the surface of the magnet,
With the right combination of materials, they reach significant thermal stability, enabling operation at or above 230°C (depending on the design),
The ability for custom shaping and adaptation to individual needs – neodymium magnets can be manufactured in many forms and dimensions, which amplifies their functionality across industries,
Wide application in cutting-edge sectors – they find application in hard drives, electromechanical systems, diagnostic apparatus as well as high-tech tools,
Compactness – despite their small size, they generate strong force, making them ideal for precision applications

Disadvantages of rare earth magnets:

They are prone to breaking when subjected to a sudden impact. If the magnets are exposed to shocks, it is advisable to use in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from damage and strengthens its overall strength,
Magnets lose magnetic efficiency when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible performance loss (influenced by the magnet’s structure). 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 synthetic coating for outdoor use,
Using a cover – such as a magnetic holder – is advised due to the difficulty in manufacturing holes directly in the magnet,
Potential hazard linked to microscopic shards may arise, if ingested accidentally, which is notable in the health of young users. Moreover, miniature parts from these products have the potential to hinder health screening after being swallowed,
In cases of large-volume purchasing, neodymium magnet cost is a challenge,

Notes with 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.

Magnets made of neodymium are delicate and can easily break and shatter.

Neodymium magnetic are delicate as well as will crack 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. At the moment of collision between the magnets, small sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.

Do not bring neodymium magnets close to 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 attract to each other, pinch the skin, and cause significant injuries.

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

Neodymium magnets are the most powerful magnets ever invented. Their power can shock you.

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

Keep neodymium magnets away from people with pacemakers.

In the case of neodymium magnets, there is a strong magnetic field. As a result, it interferes 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.

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

Neodymium magnets should not be in the vicinity youngest children.

Neodymium magnets are not toys. You cannot allow them to become toys for children. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

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

Strong magnetic fields emitted by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other devices. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. You should especially avoid placing neodymium magnets near electronic devices.

Dust and powder from neodymium magnets are 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.

Pay attention!

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