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UMP 75x24 [M8+M10] GW F200 Lina / N38 - search holder

search holder

Catalog no 210382

GTIN/EAN: 5906301814016

5.00
Load capacity 280.00 kg / 2745.86 N
Diameter Ø
75 mm [±1 mm]
Height
24 mm [±1 mm]
Weight
0.9 g
Coating
[NiCuNi] Nickel
see specifications »

230.00 zł with VAT / pcs + price for transport

186.99 zł net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
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Contact us by phone +48 888 99 98 98 otherwise send us a note via request form the contact form page.
Force along with form of magnetic components can be analyzed using our magnetic mass calculator.

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💡 Check why professionals choose Dhit over cheap substitutes

Instead of believing fairy tales on YouTube with tests on uncertified equipment, see what really determines your magnet's power:

  • 📏 Magnet thickness in the casing (min. 10mm) – This is what matters most! Thin magnets are weak. Thanks to the 1cm thickness of N52 neodymium, your magnet "sees" metal even through thick rust and mud.
  • 🛡️ Armored protection (Black Epoxy) – Forget about rust. This coating doesn't chip when hitting rocks and protects the magnet in water much better than regular nickel, which fails quickly.
  • 🧲 Eyelets that don't steal power – Made of special non-magnetic steel, so they don't stick to the magnet and don't block the force. Important: mount only one eyelet at a time! Using 3 at once is a mistake that weakens the magnet.
  • 🧶 Certified rope (min. 8mm) – You gain the certainty that your gear won't stay at the bottom. It's thick and comfortable, so it doesn't cut your fingers when pulling out heavy scrap metal.
  • 🚀 Our advantage: We are the only ones combining the strongest N52 neodymium (10mm thick) with non-magnetic eyelets. This is real power and durability you won't find anywhere else.

Invest in solid equipment and enjoy the results!

Technical - UMP 75x24 [M8+M10] GW F200 Lina / N38 - search holder

Specification / characteristics - UMP 75x24 [M8+M10] GW F200 Lina / N38 - search holder

properties
properties values
Cat. no. 210382
GTIN/EAN 5906301814016
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 75 mm [±1 mm]
Height 24 mm [±1 mm]
Weight 0.9 g
Load capacity ~ ? 280.00 kg / 2745.86 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 75x24 [M8+M10] GW F200 Lina / N38 - search holder
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
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 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²
Engineering data and GPSR

Chemical composition

iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%

Environmental data

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 210382-2026
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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. It is equipment that can handle pulling heavy and silted objects from the river bottom. For beginners, we recommend lighter single-sided models (F80-F200), for advanced users - heavier double-sided (Two-Side) ones.
The 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. The side eyelet ensures the magnet doesn't stand sideways or "on edge" during pulling. The double-sided version increases search efficiency by 100%.
This construction protects the brittle neodymium from direct impact against stones and the bottom. Avoid throwing the magnet against bridge pillars or hard obstacles. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.
Most of our starter kits are complete and ready to use. In the package, you will find everything needed: strong rope (e.g., 20m), gloves, and hardware. We recommend always securing the thread with glue or tightening the eyelet firmly before first use.
The capacity given in the name (e.g., 280.00 kg) is the maximum value measured in laboratory conditions. Dirt, rust, paint, and algae create a distance that weakens the magnet by even 70-80%. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.
If you find a dangerous object (unexploded ordnance) or an antique, you have a legal obligation to report it to appropriate services (Police, conservator). Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.
By selecting Dhit GOLD mounts, you get a product of a significantly higher standard and true magnetic power for the average cost.
The unique way of gluing and seating the magnet in the Dhit housing creates a solid structure that dampens shocks while working on difficult, rocky bottoms.
You should know that the identical mount used by the side hook can actually show only 40 kg of strength instead of the promised 200 kg. GOLD mounts focuses on honest data by providing the actual capabilities of the magnet, so you avoid disappointment during treasure hunting.
{By choosing GOLD mounts, you support Polish engineering that perfectly understands the specifics of local rivers and lakes. Don't risk it with unknown goods, it is better to choose the market leader that ensures the satisfaction of searcher.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They retain magnetic properties for almost ten years – the drop is just ~1% (in theory),
  • Neodymium magnets are distinguished by remarkably resistant to demagnetization caused by magnetic disturbances,
  • By applying a lustrous coating of nickel, the element has an elegant look,
  • Magnets have huge magnetic induction on the outer layer,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Thanks to modularity in shaping and the ability to modify to client solutions,
  • Versatile presence in high-tech industry – they are utilized in HDD drives, electromotive mechanisms, advanced medical instruments, as well as complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in miniature devices

Disadvantages

Disadvantages of NdFeB magnets:
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • We recommend a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complicated forms.
  • Health risk related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Furthermore, small components of these devices can disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Highest magnetic holding force – what affects it?

The declared magnet strength refers to the peak performance, measured under laboratory conditions, meaning:
  • using a base made of mild steel, functioning as a ideal flux conductor
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • with an polished touching surface
  • under conditions of gap-free contact (metal-to-metal)
  • under vertical application of breakaway force (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Determinants of lifting force in real conditions

During everyday use, the actual holding force depends on a number of factors, ranked from the most important:
  • Gap between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Plate material – low-carbon steel gives the best results. Alloy admixtures decrease magnetic properties and holding force.
  • Surface finish – ideal contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under shearing force the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

Safe handling of NdFeB magnets
Avoid contact if allergic

A percentage of the population have a contact allergy to Ni, which is the standard coating for neodymium magnets. Extended handling may cause a rash. It is best to wear protective gloves.

Electronic hazard

Avoid bringing magnets close to a purse, computer, or screen. The magnetism can permanently damage these devices and erase data from cards.

Do not drill into magnets

Machining of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Medical interference

For implant holders: Powerful magnets disrupt medical devices. Maintain at least 30 cm distance or request help to handle the magnets.

Magnet fragility

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Impact of two magnets leads to them shattering into shards.

Compass and GPS

Navigation devices and smartphones are extremely susceptible to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.

Danger to the youngest

Product intended for adults. Tiny parts can be swallowed, causing serious injuries. Store out of reach of kids and pets.

Crushing risk

Large magnets can smash fingers instantly. Never place your hand between two attracting surfaces.

Operating temperature

Regular neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. This process is irreversible.

Do not underestimate power

Before use, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Attention! Want to know more? Read our article: Are neodymium magnets dangerous?