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UMP 79x50 [M8] GW - search holder

search holder

Catalog no 210260

GTIN/EAN: 5906301813934

Diameter Ø

79 mm [±1 mm]

Height

50 mm [±1 mm]

Weight

1.95 g

Load capacity

340.00 kg / 3334.26 N

Coating

[NiCuNi] Nickel

check parameters »

270.00 ZŁ with VAT / pcs + price for transport

219.51 ZŁ net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety
Do you have a dilemma?

Contact us by phone +48 22 499 98 98 or drop us a message via our online form through our site.
Force along with appearance of neodymium magnets can be analyzed with our modular calculator.

Same-day shipping for orders placed before 14:00.

💡 Guide: How to choose a decent magnet and not get ripped off?

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!

Product card - UMP 79x50 [M8] GW - search holder

Specification / characteristics - UMP 79x50 [M8] GW - search holder

properties
properties values
Cat. no. 210260
GTIN/EAN 5906301813934
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 79 mm [±1 mm]
Height 50 mm [±1 mm]
Weight 1.95 g
Load capacity ~ ? 340.00 kg / 3334.26 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

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 specification and ecology
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: 210260-2026
Measurement Calculator
Magnet pull force
Magnetic Induction
Simply fill in one field, and the tool compute the rest automatically.

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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. Model UMP 79x50 [M8] GW 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. The side eyelet ensures the magnet doesn't stand sideways or "on edge" during pulling. 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. The housing significantly increases lifespan but does not make the magnet completely indestructible. 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. 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.
This force applies to perfect adherence with the entire surface to a smooth, clean steel plate with a min. thickness of 20mm. 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.
Searches are allowed as long as you do not interfere with archaeological sites or search for weapons. It is worth acting responsibly, cleaning up after yourself, and caring for the environment by removing fished-out scrap.
It is the best value because for the identical price, you buy professional-grade equipment that will serve you for many seasons than generic imports.
Most competitor mounts have thin casings that crack during the any strong impact against concrete or rocks.
Many distributors employ a tactic by advertising the power tested only on the vertical mount. GOLD mounts guarantees full transparency by providing the real parameters of the magnet, so you can be sure during real field work.
{In contrast to anonymous sellers, Dhit provides expert advice and instant service assistance, which is crucial after the purchase. Every mount is checked before delivery, which ensures that you the set will be of the highest quality.

Pros and cons of rare earth magnets.

Advantages

Apart from their notable magnetism, neodymium magnets have these key benefits:
  • They have stable power, and over around 10 years their attraction force decreases symbolically – ~1% (in testing),
  • Magnets very well defend themselves against demagnetization caused by foreign field sources,
  • Thanks to the shiny finish, the surface of Ni-Cu-Ni, gold, or silver-plated gives an professional appearance,
  • Magnets exhibit very high magnetic induction on the surface,
  • 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 flexibility in designing and the ability to customize to client solutions,
  • Fundamental importance in innovative solutions – they find application in data components, electric drive systems, diagnostic systems, and other advanced devices.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Characteristics of disadvantages of neodymium magnets: tips and applications.
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
  • NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We suggest cover - magnetic holder, due to difficulties in producing nuts inside the magnet and complex forms.
  • Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to be problematic in diagnostics medical when they are in the body.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Detachment force of the magnet in optimal conditions – what it depends on?

Breakaway force was determined for the most favorable conditions, including:
  • with the contact of a yoke made of low-carbon steel, ensuring maximum field concentration
  • with a cross-section no less than 10 mm
  • characterized by even structure
  • with direct contact (without impurities)
  • during pulling in a direction vertical to the plane
  • at room temperature

Determinants of practical lifting force of a magnet

Holding efficiency is affected by working environment parameters, mainly (from priority):
  • Distance (between the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to varnish, corrosion or debris).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
  • Steel grade – ideal substrate is high-permeability steel. Stainless steels may generate lower lifting capacity.
  • Surface finish – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, reducing force.
  • Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under shearing force the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate reduces the lifting capacity.

Warnings
Protective goggles

Beware of splinters. Magnets can fracture upon uncontrolled impact, launching shards into the air. We recommend safety glasses.

Skin irritation risks

Certain individuals experience a contact allergy to nickel, which is the standard coating for neodymium magnets. Prolonged contact can result in dermatitis. We recommend wear safety gloves.

Power loss in heat

Regular neodymium magnets (grade N) lose power when the temperature goes above 80°C. This process is irreversible.

Bone fractures

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

Compass and GPS

Navigation devices and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the internal compass in your phone.

Mechanical processing

Fire warning: Rare earth powder is explosive. Avoid machining magnets without safety gear as this risks ignition.

Warning for heart patients

Individuals with a ICD have to keep an absolute distance from magnets. The magnetism can stop the operation of the implant.

Electronic devices

Avoid bringing magnets close to a purse, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.

Swallowing risk

Only for adults. Small elements pose a choking risk, causing serious injuries. Store away from children and animals.

Conscious usage

Use magnets consciously. Their huge power can surprise even experienced users. Stay alert and do not underestimate their force.

Warning! Want to know more? Check our post: Why are neodymium magnets dangerous?