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

search holder

Catalog no 210231

GTIN/EAN: 5906301813910

5.00
Load capacity 130.00 kg / 1274.86 N
Diameter Ø
50 mm [±1 mm]
Height
20 mm [±1 mm]
Weight
0.6 g
Coating
[NiCuNi] Nickel
technical parameters »

77.00 zł with VAT / pcs + price for transport

62.60 zł net + 23% VAT / pcs

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💡 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!

Physical properties - 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
Engineering data and GPSR

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%

Ecology and recycling (GPSR)

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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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. 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 double-sided model attracts from above and below, increasing the chance of hooking a find. Side mounting is ideal for throwing from the shore, as the magnet drags flat along the bottom. The double-sided version increases search efficiency by 100%.
Our holders have a thick steel housing covered with an anti-corrosion layer (chrome, nickel, zinc). Despite solid construction, neodymium is a brittle material and can chip upon very strong impact (e.g., against concrete). After each fishing trip, we recommend rinsing the magnet with fresh water and drying it.
Check the product title and description to see if you are buying just the magnet or the XL set. A full set usually contains: magnet, polypropylene rope with appropriate strength, protective gloves, hook, and carabiner. Using thread glue is crucial to not lose the magnet in silt.
The capacity given in the name (e.g., 130.00 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%. A large power reserve is essential in real search conditions.
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.
By choosing Dhit GOLD mounts, you get a product of a significantly higher standard and true magnetic power for the average cost.
The GOLD series feature a robust construction that provides a true shield for the magnetic core.
Many distributors employ a tactic by promoting the pull force measured exclusively on the top hook. Crucially, in the web, it is hard to find recordings testing the real side-pull force of competitor products on the side hook.
{Unlike competitors importing from China, Dhit provides full support and real warranty help, which is crucial after the transaction. Don't risk it with unknown goods, stick with proven gear that cares about the satisfaction of searcher.

Pros and cons of Nd2Fe14B magnets.

Strengths

Apart from their strong magnetism, neodymium magnets have these key benefits:
  • They have unchanged lifting capacity, and over more than ten years their attraction force decreases symbolically – ~1% (in testing),
  • Neodymium magnets prove to be highly resistant to loss of magnetic properties caused by external interference,
  • A magnet with a smooth gold surface is more attractive,
  • Magnets possess impressive magnetic induction on the active area,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures approaching 230°C and above...
  • Possibility of precise shaping as well as optimizing to atypical needs,
  • Significant place in modern industrial fields – they find application in computer drives, electric motors, medical equipment, and other advanced devices.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Characteristics of disadvantages of neodymium magnets: application proposals
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their power 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, when using outdoors
  • Due to limitations in creating nuts and complex forms in magnets, we propose using casing - magnetic holder.
  • Health risk related to microscopic parts of magnets pose a threat, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, tiny parts of these products can disrupt the diagnostic process medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Magnetic strength at its maximum – what it depends on?

Information about lifting capacity is the result of a measurement for optimal configuration, taking into account:
  • on a block made of structural steel, optimally conducting the magnetic flux
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with a plane cleaned and smooth
  • without any insulating layer between the magnet and steel
  • under perpendicular application of breakaway force (90-degree angle)
  • in stable room temperature

Lifting capacity in real conditions – factors

In practice, the actual lifting capacity is determined by many variables, presented from the most important:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet holds much less (typically approx. 20-30% of nominal force).
  • Steel thickness – insufficiently thick steel does not accept the full field, causing part of the power to be lost into the air.
  • Metal type – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
  • Base smoothness – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
  • Temperature – temperature increase results in weakening of force. It is worth remembering the thermal limit for a given model.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, whereas under parallel forces the holding force is lower. Moreover, even a small distance between the magnet and the plate reduces the load capacity.

Precautions when working with neodymium magnets
Allergy Warning

A percentage of the population have a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Prolonged contact might lead to an allergic reaction. It is best to wear safety gloves.

Fire risk

Combustion risk: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.

Eye protection

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Collision of two magnets leads to them shattering into small pieces.

Data carriers

Avoid bringing magnets near a purse, laptop, or screen. The magnetic field can destroy these devices and erase data from cards.

Do not overheat magnets

Avoid heat. Neodymium magnets are susceptible to temperature. If you need operation above 80°C, look for HT versions (H, SH, UH).

Threat to navigation

Navigation devices and smartphones are highly sensitive to magnetism. Close proximity with a strong magnet can permanently damage the sensors in your phone.

Keep away from children

Always store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are very dangerous.

Implant safety

Individuals with a pacemaker should keep an safe separation from magnets. The magnetic field can stop the operation of the implant.

Handling rules

Handle with care. Rare earth magnets act from a long distance and connect with huge force, often quicker than you can move away.

Physical harm

Risk of injury: The attraction force is so immense that it can cause blood blisters, pinching, and broken bones. Use thick gloves.

Caution! Need more info? Check our post: Are neodymium magnets dangerous?