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neodymium magnets

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UMGZ 16x13x5 [M4] GZ / N38 - magnetic holder external thread

magnetic holder external thread

Catalog no 190321

GTIN: 5906301813804

5

Diameter Ø [±0,1 mm]

16 mm

Height [±0,1 mm]

13 mm

Height [±0,1 mm]

5 mm

Weight

7 g

Load capacity

5 kg / 49.03 N

3.89 with VAT / pcs + price for transport

3.16 ZŁ net + 23% VAT / pcs

bulk discounts:

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UMGZ 16x13x5 [M4] GZ / N38 - magnetic holder external thread

Specification/characteristics UMGZ 16x13x5 [M4] GZ / N38 - magnetic holder external thread
properties
values
Cat. no.
190321
GTIN
5906301813804
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
16 mm [±0,1 mm]
Height
13 mm [±0,1 mm]
Height
5 mm [±0,1 mm]
Weight
7 g [±0,1 mm]
Load capacity ~ ?
5 kg / 49.03 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
T
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
Hv
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

Shopping tips

Mounts with built-in neodymium magnets featuring an external thread offer robust accessories, applied in many fields, including construction, light industry, or advertising. The construction is based on a high-performance NdFeB magnet, installed in metal casing coated with zinc and nickel. The external thread ranging from M3–M10 enables installation onto compatible surfaces, which enables to screw in nameplates, lighting, tools. Thanks to a strong magnetic field, such mounts offer a pulling strength of up to 68 kg, depending on the model and size. Applications of the holders include not only industrial operations and DIY projects. Some versions are equipped with a rubber coating, which protects surfaces from scratches and improves moisture resistance. However, it is important to remember NdFeB magnets are brittle and are prone to cracking under over-tightened mounting. Caution during installation is recommended, and they should be stored away from magnetic cards and electronic devices. To ensure reliability, it is advisable to choose certified products.

Advantages and disadvantages of neodymium magnets NdFeB.

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

  • They do not lose their magnetism, even after approximately 10 years – the decrease of lifting capacity is only ~1% (based on measurements),
  • They protect against demagnetization induced by external electromagnetic environments effectively,
  • Because of the lustrous layer of silver, the component looks aesthetically refined,
  • They exhibit superior levels of magnetic induction near the outer area of the magnet,
  • Thanks to their high temperature resistance, they can operate (depending on the geometry) even at temperatures up to 230°C or more,
  • Thanks to the possibility in shaping and the capability to adapt to unique requirements, neodymium magnets can be created in various configurations, which broadens their application range,
  • Important function in advanced technical fields – they find application in computer drives, electric motors, clinical machines or even high-tech tools,
  • 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 NdFeB magnets:

  • They may fracture when subjected to a sudden impact. If the magnets are exposed to physical collisions, it is advisable to use in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from damage and additionally strengthens its overall robustness,
  • Magnets lose power when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible magnetic decay (influenced by the magnet’s form). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
  • They rust in a wet environment, especially when used outside, we recommend using waterproof magnets, such as those made of non-metallic materials,
  • Using a cover – such as a magnetic holder – is advised due to the challenges in manufacturing holes directly in the magnet,
  • Safety concern related to magnet particles may arise, when consumed by mistake, which is important in the context of child safety. It should also be noted that small elements from these devices might disrupt scanning if inside the body,
  • High unit cost – neodymium magnets are costlier than other types of magnets (e.g., ferrite), which can restrict large-scale applications

Caution with Neodymium Magnets

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

Please review the information on how to handle neodymium magnets and avoid significant harm to your body, as well as prevent unintentional damage to the magnets.

 Maintain neodymium magnets far from children.

Neodymium magnets are not toys. Do not allow children to play with them. In the case of swallowing multiple magnets simultaneously, they can attract to each other through the intestinal walls. In the worst case scenario, this can lead to death.

Dust and powder from neodymium magnets are flammable.

Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

Neodymium magnets can demagnetize at high temperatures.

While Neodymium magnets can demagnetize 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.

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

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. They can also damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

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

Magnetic fields interfere with compasses and magnetometers used in navigation for air and sea transport, as well as internal compasses of smartphones and GPS devices.

Keep neodymium magnets away from people with pacemakers.

Neodymium magnets generate very strong magnetic fields that can interfere with the operation of a pacemaker. This is because many of these devices are equipped with a function that deactivates the device in a magnetic field.

Neodymium Magnets can attract to each other, pinch the skin, and cause significant swellings.

Magnets will attract each other within a distance of several to about 10 cm from each other. Don't put your fingers in the path of magnet attraction, as a major injury may occur. Magnets, depending on their size, can even cut off a finger or alternatively there can be a significant pressure or a fracture.

Magnets made of neodymium are highly susceptible to damage, resulting in breaking.

Magnets made of neodymium are extremely delicate, and by joining them in an uncontrolled manner, they will crumble. Neodymium magnets are made of metal and coated with a shiny nickel surface, but they are not as hard as steel. At the moment of connection between the magnets, sharp metal fragments can be dispersed in different directions.

Safety rules!

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

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