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UMP 65x45 [M8]x2 GW / N38 - search holder

search holder

Catalog no 210348

GTIN: 5906301813996

Diameter Ø [±0,1 mm]

65 mm

Height [±0,1 mm]

45 mm

Weight

1170 g

Load capacity

230 kg / 2255.53 N

Coating

[NiCuNi] nickel

150.00 ZŁ with VAT / pcs + price for transport

121.95 ZŁ net + 23% VAT / pcs

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UMP 65x45 [M8]x2 GW / N38 - search holder

Specification/characteristics UMP 65x45 [M8]x2 GW / N38 - search holder

properties

values

Cat. no.

210348

GTIN

5906301813996

Production/Distribution

Dhit sp. z o.o.

Country of origin

Poland / China / Germany

Customs code

85059029

Diameter Ø

65 mm [±0,1 mm]

Height

45 mm [±0,1 mm]

Weight

1170 g [±0,1 mm]

Load capacity ~ ?

230 kg / 2255.53 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 65x45 [M8]x2 GW / N38, which is exceptionally strong and has an impressive magnetic pulling force of approximately ~230 kg. This model is ideal for retrieving metal objects at the bottom of water bodies.

Neodymium magnets are efficient for searching in water environments due to their strong attraction capability. UMP 65x45 [M8]x2 GW / N38 weighing 1170 grams with a pulling force of ~230 kg is a great choice for finding lost treasures.

When choosing a magnetic holder for underwater searches, you should pay attention to the number of Gauss or Tesla value, which determines the attraction strength. UMP 65x45 [M8]x2 GW / N38 has a pulling force of approximately ~230 kg, making it a powerful tool for retrieving objects with significant mass. Remember that the full power is achieved with the upper holder, while the side attachment offers only 10%-25% of that power.

The sideways force of a magnet is typically lower than the perpendicular force because it depends on the fraction of the magnetic field that interacts with the metal surface. In the case of UMP 65x45 [M8]x2 GW / N38 with a pulling force of ~230 kg, maximum power are achieved with the upper holder, while the side attachment offers only one-fourth to one-quarter of the stated power.

he Lifting force was measured under test conditions, using a smooth S235 low-carbon steel plate with a thickness of 10 mm, with the application of lifting force in a vertical manner. In a situation where the sliding occurs, the magnet's attraction force can be 5 times lower! Any gap between the magnet and the plate can result in a reduction in the lifting force.

magnetic holder 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 virtually do not lose strength, because even after 10 years, the decline in efficiency is only ~1% (based on calculations),
They show superior resistance to demagnetization from external field exposure,
Because of the lustrous layer of gold, the component looks visually appealing,
They exhibit elevated levels of magnetic induction near the outer area of the magnet,
They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
Thanks to the possibility in shaping and the capability to adapt to specific requirements, neodymium magnets can be created in various configurations, which increases their functional possibilities,
Wide application in modern technologies – they are used in data storage devices, electric drives, medical equipment or even sophisticated instruments,
Thanks to their efficiency per volume, small magnets offer high magnetic performance, while occupying minimal space,

Disadvantages of magnetic elements:

They can break when subjected to a heavy impact. If the magnets are exposed to shocks, they should be placed in a metal holder. The steel housing, in the form of a holder, protects the magnet from damage and additionally increases its overall robustness,
They lose magnetic force at increased temperatures. Most neodymium magnets experience permanent reduction in strength when heated above 80°C (depending on the shape and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
Due to corrosion risk in humid conditions, it is common to use sealed magnets made of plastic for outdoor use,
The use of a protective casing or external holder is recommended, since machining threads in neodymium magnets is not feasible,
Health risk due to small fragments may arise, in case of ingestion, which is significant in the protection of children. Additionally, minuscule fragments from these assemblies have the potential to interfere with diagnostics once in the system,
Due to the price of neodymium, their cost is above average,

Precautions

Dust and powder from neodymium magnets are highly flammable.

Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.

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

Magnetic 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. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.

Neodymium magnets are highly susceptible to damage, leading to their cracking.

Magnets made of neodymium are extremely fragile, 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. In the event of a collision between two magnets, there may be a scattering of fragments in different directions. Protecting your eyes is crucial in such a situation.

The magnet is coated with nickel. Therefore, exercise caution 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.

Neodymium magnets can demagnetize at high temperatures.

Although magnets have demonstrated their effectiveness up to 80°C or 175°F, the temperature can vary depending on the type, shape, and intended use of the specific magnet.

It is essential to keep neodymium magnets out of reach from youngest children.

Not all neodymium magnets are toys, so do not let children play with them. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.

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

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

Keep neodymium magnets away from people with pacemakers.

Neodymium magnets generate strong magnetic fields. As a result, they interfere with the operation of a pacemaker. This happens because such devices have a function to deactivate them in a magnetic field.

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 injuries.

Magnets may crack or crumble with careless joining to each other. You can't approach them to each other. At a distance less than 10 cm you should hold them very firmly.

Neodymium magnets are the strongest magnets ever created, and their strength can shock you.

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

Safety precautions!

In order for you to know how strong neodymium magnets are and why they are so dangerous, see the article - Dangerous very powerful neodymium magnets.