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UMP 50x20 [M8] GW / N38 - search holder

search holder

Catalog no 210231

GTIN: 5906301813910

Diameter Ø [±0,1 mm]

50 mm

Height [±0,1 mm]

20 mm

Weight

0.6 g

Magnetization Direction

↑ axial

Load capacity

130 kg / 1274.86 N

Coating

[NiCuNi] nickel

77.00 ZŁ with VAT / pcs + price for transport

62.60 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure about your choice?

Pick up the phone and ask +48 888 99 98 98 alternatively get in touch by means of inquiry form the contact section.
Weight as well as form of a neodymium magnet can be reviewed with our force calculator.

Orders placed before 14:00 will be shipped the same business day.

UMP 50x20 [M8] GW / N38 - search holder

Specification/characteristics UMP 50x20 [M8] GW / N38 - search holder

properties

values

Cat. no.

210231

GTIN

5906301813910

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

50 mm [±0,1 mm]

Height

20 mm [±0,1 mm]

Weight

0.6 g [±0,1 mm]

Magnetization Direction

↑ axial

Load capacity ~ ?

130 kg / 1274.86 N

Coating

[NiCuNi] nickel

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

Shopping tips

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For underwater searches, we recommend UMP 50x20 [M8] GW / N38, which is exceptionally strong and has an impressive magnetic pulling force of approximately ~130 kg. This model is perfect for retrieving metal objects at the bottom of water bodies.

Magnetic holders are ideal for searching in water environments due to their high lifting force. UMP 50x20 [M8] GW / N38 weighing 0.6 grams with a pulling force of ~130 kg is a great choice for finding metallic findings.

When choosing a magnetic holder for water exploration, you should pay attention to the number of Gauss or Tesla value, which determines the lifting force. UMP 50x20 [M8] GW / N38 has a pulling force of approximately ~130 kg, making it a powerful tool for retrieving objects with significant mass. Remember that the full power is achieved with the top attachment, while the side attachment offers only 10%-25% of that power.

The sideways force of a magnetic holder is typically lower than the adhesive force because it depends on the fraction of the magnetic field that interacts with the metal surface. In the case of UMP 50x20 [M8] GW / N38 with a lifting capacity of ~130 kg, maximum power are achieved with the top attachment, while the side holder offers only one-fourth to one-quarter of the declared force.

he attraction force was measured under laboratory conditions, using a smooth S235 low-carbon steel plate with a thickness of 10 mm, with the application of lifting force in a perpendicular manner. In a situation where the force acts parallelly, the magnet's attraction force can be five times lower! Any gap between the magnet and the plate can cause a reduction in the lifting force.

magnetic pot strength F200 GOLD F300 GOLD

Advantages as well as disadvantages of neodymium magnets NdFeB.

Besides their stability, neodymium magnets are valued for these benefits:

They do not lose their magnetism, even after approximately ten years – the loss of power is only ~1% (according to tests),
They are very resistant to demagnetization caused by external magnetic sources,
In other words, due to the metallic silver coating, the magnet obtains an professional appearance,
The outer field strength of the magnet shows elevated magnetic properties,
They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
With the option for fine forming and precise design, these magnets can be produced in multiple shapes and sizes, greatly improving application potential,
Key role in cutting-edge sectors – they are used in computer drives, electromechanical systems, diagnostic apparatus and sophisticated instruments,
Compactness – despite their small size, they generate strong force, making them ideal for precision applications

Disadvantages of neodymium magnets:

They can break when subjected to a strong impact. If the magnets are exposed to external force, it is suggested to place them in a metal holder. The steel housing, in the form of a holder, protects the magnet from damage and additionally reinforces its overall robustness,
Magnets lose magnetic efficiency when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible power drop (influenced by the magnet’s profile). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
Magnets exposed to wet conditions can rust. Therefore, for outdoor applications, it's best to use waterproof types made of plastic,
Using a cover – such as a magnetic holder – is advised due to the restrictions in manufacturing threads directly in the magnet,
Possible threat related to magnet particles may arise, in case of ingestion, which is important in the health of young users. Furthermore, miniature parts from these products can interfere with diagnostics once in the system,
High unit cost – neodymium magnets are more expensive than other types of magnets (e.g., ferrite), which can restrict large-scale applications

Handle Neodymium Magnets Carefully

Neodymium magnets should not be near people with pacemakers.

Neodymium magnets generate strong magnetic fields. As a result, they 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.

Avoid bringing neodymium magnets close to a phone or GPS.

Neodymium magnets are a source of intense magnetic fields that cause interference with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.

Do not give neodymium magnets to 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 are over 10 times stronger than ferrite magnets (the ones in speakers), and their power can surprise you.

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

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

Neodymium magnets will bounce and clash together within a radius of several to almost 10 cm from each other.

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.

Neodymium magnetic are characterized by being fragile, which can cause them to 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. 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.

You should keep neodymium magnets at a safe distance from the wallet, computer, and TV.

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. 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.

If you have a nickel allergy, avoid contact with neodymium magnets.

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.

Be careful!

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