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

search holder

Catalog no 210231

GTIN/EAN: 5906301813910

5.00

Diameter Ø

50 mm [±1 mm]

Height

20 mm [±1 mm]

Weight

0.6 g

Load capacity

130.00 kg / 1274.86 N

Coating

[NiCuNi] Nickel

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77.00 ZŁ with VAT / pcs + price for transport

62.60 ZŁ net + 23% VAT / pcs

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Contact us by phone +48 22 499 98 98 if you prefer send us a note through our online form through our site.
Parameters and appearance of neodymium magnets can be verified using our power calculator.

Orders submitted before 14:00 will be dispatched today!

💡 Check why professionals choose Dhit over cheap substitutes

Don't be fooled by amateur online tests – go for certified quality and specific parameters that guarantee success:

  • 📏 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!

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

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

properties
properties values
Cat. no. 210231
GTIN/EAN 5906301813910
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 50 mm [±1 mm]
Height 20 mm [±1 mm]
Weight 0.6 g
Load capacity ~ ? 130.00 kg / 1274.86 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 50x20 [M8] GW / 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
Technical and environmental data
Material specification
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: 210231-2026
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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. Model UMP 50x20 [M8] GW / N38 offers an optimal weight-to-pull force ratio, which is important for repeated throwing. The choice depends on whether you plan to throw from the shore (double-sided) or from a bridge (single-sided).
The 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. Top mounting works well when fishing from a bridge, pier, or well (vertical technique). The double-sided version increases search efficiency by 100%.
The magnet is glued into a solid steel cup and sealed with epoxy resin, protecting it from water. Avoid throwing the magnet against bridge pillars or hard obstacles. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.
We offer both standalone holders and ready-made gift sets (depending on the selected option in the store). In the package, you will find everything needed: strong rope (e.g., 20m), gloves, and hardware. Using thread glue is crucial to not lose the magnet in silt.
It is a technical parameter defining perpendicular break force, not the weight of an object in water. The magnet may slide on round elements (bicycle frame) due to the small contact area. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.
Possessing and using a neodymium magnet to clean the bottom is generally legal, provided you are not searching for artifacts protected by law. We recommend familiarizing yourself with current local regulations and heritage protection laws.
It is the best value because for the identical price, you obtain a premium mount that will last for much longer than generic imports.
Consequently, despite the affordable cost, the lifespan of the Dhit product positions it a step above other brands.
Many sellers use a trick by advertising the pull force tested exclusively on the vertical mount. GOLD mounts focuses on full transparency by providing the actual capabilities of the gear, so you avoid disappointment during treasure hunting.
{By choosing GOLD mounts, you bet on a local market leader that knows the conditions of local rivers and lakes. Instead of risking with random brands, it is better to choose the market leader that ensures the happiness of every user.

Strengths as well as weaknesses of neodymium magnets.

Strengths

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They retain attractive force for nearly ten years – the loss is just ~1% (according to analyses),
  • They possess excellent resistance to weakening of magnetic properties when exposed to external magnetic sources,
  • The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to have aesthetics,
  • Magnetic induction on the surface of the magnet is very high,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Due to the ability of accurate shaping and adaptation to individualized requirements, NdFeB magnets can be modeled in a wide range of geometric configurations, which amplifies use scope,
  • Huge importance in modern technologies – they serve a role in computer drives, electric motors, advanced medical instruments, and industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Limitations

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • At strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
  • We recommend cover - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex shapes.
  • Health risk to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child health protection. Additionally, tiny parts of these products can disrupt the diagnostic process medical in case of swallowing.
  • With mass production the cost of neodymium magnets is economically unviable,

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what affects it?

The force parameter is a measurement result performed under specific, ideal conditions:
  • using a sheet made of mild steel, serving as a magnetic yoke
  • with a cross-section of at least 10 mm
  • with an ideally smooth contact surface
  • without any insulating layer between the magnet and steel
  • during detachment in a direction vertical to the mounting surface
  • in neutral thermal conditions

Lifting capacity in real conditions – factors

In real-world applications, the actual holding force depends on many variables, listed from crucial:
  • Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Base massiveness – insufficiently thick sheet does not accept the full field, causing part of the flux to be escaped to the other side.
  • Metal type – not every steel reacts the same. Alloy additives weaken the interaction with the magnet.
  • Smoothness – ideal contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Thermal environment – heating the magnet results in weakening of induction. Check the maximum operating temperature for a given model.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet and the plate reduces the load capacity.

Safe handling of NdFeB magnets
Conscious usage

Handle magnets with awareness. Their huge power can shock even experienced users. Plan your moves and do not underestimate their force.

Fragile material

NdFeB magnets are ceramic materials, meaning they are fragile like glass. Impact of two magnets will cause them cracking into shards.

Do not overheat magnets

Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. Damage is permanent.

Swallowing risk

Always keep magnets out of reach of children. Choking hazard is significant, and the consequences of magnets connecting inside the body are very dangerous.

Metal Allergy

Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, refrain from direct skin contact or choose coated magnets.

Threat to electronics

Do not bring magnets close to a purse, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.

Life threat

Life threat: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

Hand protection

Mind your fingers. Two powerful magnets will snap together immediately with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Magnetic interference

GPS units and smartphones are extremely sensitive to magnetism. Close proximity with a strong magnet can permanently damage the sensors in your phone.

Machining danger

Fire warning: Neodymium dust is highly flammable. Do not process magnets in home conditions as this may cause fire.

Danger! Looking for details? Read our article: Why are neodymium magnets dangerous?