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UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread

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UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread

magnetic holder external thread

Catalog no 190322

GTIN: 5906301813811

Diameter Ø [±0,1 mm]

20 mm

Height [±0,1 mm]

15 mm

Height [±0,1 mm]

7 mm

Weight

14 g

Load capacity

9 kg / 88.26 N

7.22 ZŁ with VAT / pcs + price for transport

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UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread

Specification/characteristics UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread

properties

values

Cat. no.

190322

GTIN

5906301813811

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

14 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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Magnetic holders with neodymium magnets with external thread are modern solutions, used across various fields, such as construction, light industry, or assembly technology. Their design is based on a high-performance NdFeB magnet, installed within a durable metal casing protected by an anti-corrosion layer. Threaded pin in sizes M3–M10 enables installation into threaded holes, which enables to fasten nameplates, lighting, tools. With the help of a focused magnetic field, such mounts offer a holding force of up to 68 kg, depending on the model and size. Applications of the holders include both workshops and DIY projects. Certain models are equipped with a rubber coating, which protects surfaces from damage and improves moisture resistance. Note, however, that NdFeB magnets are brittle and may break under excessive tightening. Caution during installation is recommended, and holders should be kept away from electronics. For best quality, it is advisable to choose models from trusted manufacturers.

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 ten years, the performance loss is only ~1% (based on calculations),
They protect against demagnetization induced by surrounding electromagnetic environments very well,
In other words, due to the glossy nickel coating, the magnet obtains an stylish appearance,
They have very high magnetic induction on the surface of the magnet,
These magnets tolerate high temperatures, often exceeding 230°C, when properly designed (in relation to profile),
With the option for fine forming and precise design, these magnets can be produced in multiple shapes and sizes, greatly improving design adaptation,
Important function in advanced technical fields – they find application in hard drives, electromechanical systems, healthcare devices as well as other advanced devices,
Relatively small size with high magnetic force – neodymium magnets offer impressive pulling strength in small dimensions, which makes them ideal in miniature devices

Disadvantages of magnetic elements:

They are prone to breaking when subjected to a sudden impact. If the magnets are exposed to mechanical hits, we recommend in a metal holder. The steel housing, in the form of a holder, protects the magnet from damage and strengthens its overall durability,
They lose power at increased temperatures. Most neodymium magnets experience permanent degradation in strength when heated above 80°C (depending on the form and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
Magnets exposed to damp air can corrode. Therefore, for outdoor applications, we suggest waterproof types made of coated materials,
The use of a protective casing or external holder is recommended, since machining multi-axis shapes in neodymium magnets is risky,
Safety concern from tiny pieces may arise, if ingested accidentally, which is important in the health of young users. Additionally, tiny components from these assemblies have the potential to interfere with diagnostics once in the system,
In cases of large-volume purchasing, neodymium magnet cost may be a barrier,

Safety Precautions

Magnets are not toys, youngest should not play with them.

Neodymium magnets are not toys. Do not allow children to play 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 attract to each other due to their immense internal force, causing the skin and other body parts to get pinched and resulting in significant swellings.

Neodymium magnets jump and also clash mutually within a radius of several to around 10 cm from each other.

Neodymium magnets can demagnetize 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 fragile as well as can easily crack as well as shatter.

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. 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.

Neodymium magnets are the strongest magnets ever invented. 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.

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.

Do not place neodymium magnets near a computer HDD, TV, and wallet.

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

Neodymium magnets are not recommended for 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. Even if the magnetic field does not affect the device, it can damage its components or deactivate the entire device.

The magnet coating is made of nickel, so be cautious if you have an 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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.

Do not bring neodymium magnets close to GPS and smartphones.

Strong fields generated by neodymium magnets interfere with compasses and magnetometers used in navigation, as well as internal compasses of smartphones and GPS devices.

Be careful!

So that know how strong neodymium magnets are and why they are so dangerous, read the article - Dangerous very powerful neodymium magnets.