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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

How we measure these parameters — certificates and measurements

technical parameters »

186.99 zł net / pcs

230.00 zł with VAT (23% VAT) / pcs

price for transport

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Frequently asked questions

How strong a magnet do I need for magnet fishing?
Our search magnets are rated between 32 kg and 680 kg of pull force. The rating is measured as a straight, perpendicular pull on thick, clean steel — in a river you almost never pull that way, so treat it as a figure for comparing models rather than a promise. For a first magnet, mid-range models around 300 kg are easier to handle than the heaviest ones, which are simply hard to lift once they grab a submerged object.
What rope and shackle should I pair with the magnet?
Match the whole chain, not just the magnet. Our ø10 mm rope is rated at 1592 kg and the M10 shackle at 320 kg, so with a 310 kg magnet the shackle is the limiting part. Whatever you buy, check the rating of every component separately and take the lowest one as the rating of the set. The knot at the eye is usually weaker than the rope itself.
What is the difference between a single-sided and a double-sided fishing magnet?
A single-sided magnet holds on one face only, so it has to land the right way round. A double-sided one grabs from either face, which matters when you throw it into moving water and cannot control how it lands. The trade-off is weight and price for the same nominal pull force — the F200 GOLD DUAL, for instance, is rated at 601 kg against 310 kg for the single-sided F200 GOLD.
Does the pull force rating apply underwater?
Water itself is not the problem — it is not magnetic and barely changes the force. What changes it is everything else: silt and rust between the magnet and the find, a curved or thin surface instead of a flat plate, and a pull that comes at an angle rather than straight off. Expect a fraction of the catalogue figure in real conditions, and choose the mounting point and coating with that in mind.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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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 dimensions and grade – Compare the specifications of the exact model in the technical table. Thickness, material grade and geometry all affect holding force and field reach.
  • 🛡️ Protective coating – Check the coating specified for the product and match it to the working environment. Water, impacts and scratches can shorten the life of an inadequately protected magnet.
  • 🧲 Mounting and force direction – The mounting method affects the actual force of the assembly. Use components intended for the specific model and follow the recommendations on its product page.
  • 🧶 Accessory selection – If the product is used with a rope, shackle or hook, check the load rating of every component. The weakest component determines the safety of the complete assembly.
  • 🚀 Choose using comparable data: Each product page lists the magnet grade, dimensions, coating and measured holding force. Compare models using the same parameters and test conditions.

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
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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

Elemental analysis

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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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. This specific magnet ensures a laboratory lifting capacity of up to 280.00 kg, which translates into high effectiveness in water. The choice depends on whether you plan to throw from the shore (double-sided) or from a bridge (single-sided).
Double-sided holders (Two-Side) have two active magnetic surfaces and two mounting holes. Side mounting is ideal for throwing from the shore, as the magnet drags flat along the bottom. Single-sided magnets are usually lighter and cheaper but less effective for long throws.
Our holders have a thick steel housing covered with an anti-corrosion layer (chrome, nickel, zinc). 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.
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. 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. Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.
It is the smartest investment because for the same money, you obtain a premium mount that will serve you for much longer than budget alternatives.
Most competitor mounts have thin casings that deform during the first hard impact against concrete or rocks.
You should know that the same magnet pulled by the side hook often has as little as 40 kg of power instead of the promised 200 kg. GOLD mounts focuses on honest data by stating the actual capabilities of the gear, so you can be sure during real field work.
GOLD search mounts are available in several variants for different conditions. Compare the dimensions, mounting points and pull forces in the product cards before choosing a model.

Strengths as well as weaknesses of rare earth magnets.

Benefits

Besides their stability, neodymium magnets are valued for these benefits:
  • They do not lose magnetism, even over around 10 years – the drop in power is only ~1% (based on measurements),
  • They show high resistance to demagnetization induced by presence of other magnetic fields,
  • The use of an refined coating of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Magnetic induction on the working layer of the magnet turns out to be exceptional,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Possibility of precise machining and adjusting to specific applications,
  • Universal use in advanced technology sectors – they are utilized in hard drives, brushless drives, diagnostic systems, also complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in realizing threads and complex shapes in magnets, we propose using casing - magnetic holder.
  • Health risk related to microscopic parts of magnets can be dangerous, if swallowed, which gains importance in the context of child safety. Additionally, small elements of these magnets are able to be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what it depends on?

The load parameter shown represents the peak performance, recorded under optimal environment, specifically:
  • using a base made of low-carbon steel, acting as a ideal flux conductor
  • with a thickness of at least 10 mm
  • with an ground contact surface
  • under conditions of no distance (surface-to-surface)
  • under vertical force vector (90-degree angle)
  • in neutral thermal conditions

What influences lifting capacity in practice

In practice, the actual lifting capacity depends on a number of factors, listed from the most important:
  • Distance (betwixt the magnet and the plate), as even a very small distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Material type – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
  • Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Rough surfaces weaken the grip.
  • Temperature – heating the magnet results in weakening of force. Check the thermal limit for a given model.

Lifting capacity was measured with the use of a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the lifting capacity is smaller. Additionally, even a slight gap between the magnet and the plate decreases the lifting capacity.

Warnings
Mechanical processing

Mechanical processing of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Nickel allergy

Studies show that the nickel plating (standard magnet coating) is a common allergen. For allergy sufferers, prevent direct skin contact or opt for encased magnets.

Caution required

Handle magnets with awareness. Their powerful strength can shock even experienced users. Be vigilant and respect their power.

Shattering risk

Protect your eyes. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Implant safety

Life threat: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Electronic devices

Device Safety: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, hearing aids, timepieces).

Physical harm

Large magnets can break fingers instantly. Under no circumstances place your hand betwixt two strong magnets.

Impact on smartphones

A powerful magnetic field disrupts the functioning of compasses in phones and GPS navigation. Do not bring magnets near a device to prevent breaking the sensors.

Product not for children

Always keep magnets out of reach of children. Risk of swallowing is high, and the effects of magnets clamping inside the body are life-threatening.

Power loss in heat

Do not overheat. NdFeB magnets are sensitive to heat. If you need resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

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