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UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 - search holder

search holder

Catalog no 210452

GTIN/EAN: 5906301814122

5.00
Load capacity 601.00 kg / 5893.80 N
Diameter Ø
75 mm [±1 mm]
Height
25 mm [±1 mm]
Weight
1800 g
Coating
[NiCuNi] Nickel
Magnetic Flux
~ 20 000 Gauss [±5%]

How we measure these parameters — certificates and measurements

technical specifications »

199.19 zł net / pcs

245.00 zł with VAT (23% VAT) / pcs

price for transport

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price from 1 pcs
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245.00 zł
price from 10 pcs
187.24 zł
230.30 zł
price from 15 pcs
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215.60 zł

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.

Order by 14:00 and we’ll ship 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 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 details - UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 - search holder

Specification / characteristics - UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 - search holder

properties
properties values
Cat. no. 210452
GTIN/EAN 5906301814122
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 25 mm [±1 mm]
Weight 1800 g
Load capacity ~ ? 601.00 kg / 5893.80 N
Coating [NiCuNi] Nickel
Series GOLD
Holder Type 2 sided
Material Type Structural steel S235 (ferrous)
Magnetic Flux ~ 20 000 Gauss [±5%]
Size/Mount Quantity 4xM10
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 - search holder
properties values units
Remanence Br ? 12.9-13.2 kGs
Remanence Br ? 1290-1320 mT
Coercivity bHc ? 10.8-12.0 kOe
Coercivity bHc ? 860-955 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 40-42 BH max MGOe
Energy product BHmax ? 318-334 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
Technical specification and ecology

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%

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: 210452-2026
Quick Unit Converter

Pulling force

Field Strength

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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. Model UMP 75x25 [M10x3] GW F200 GOLD DUAL / N42 offers an optimal weight-to-pull force ratio, which is important for repeated throwing. For beginners, we recommend lighter single-sided models (F80-F200), for advanced users - heavier double-sided (Two-Side) ones.
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. Single-sided magnets are usually lighter and cheaper but less effective for long throws.
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.
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.
It is a technical parameter defining perpendicular break force, not the weight of an object in water. 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.
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.
By selecting the Dhit brand, you receive a higher quality standard and real N52 grade for the average cost.
Most magnets on the market have thin casings that crack during the any strong impact against concrete or rocks.
It is worth remembering that the identical mount used by the lateral point often has only 40 kg of strength instead of the declared 200 kg. The Dhit brand guarantees full transparency by providing the real parameters of the magnet, so you avoid disappointment during treasure hunting.
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.

Pros as well as cons of rare earth magnets.

Benefits

Apart from their superior magnetism, neodymium magnets have these key benefits:
  • They retain attractive force for nearly ten years – the drop is just ~1% (based on simulations),
  • Neodymium magnets prove to be extremely resistant to magnetic field loss caused by external interference,
  • By covering with a reflective layer of gold, the element acquires an elegant look,
  • Magnets possess very high magnetic induction on the outer layer,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to flexibility in forming and the capacity to adapt to individual projects,
  • Universal use in modern technologies – they are used in hard drives, electromotive mechanisms, medical equipment, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in miniature devices

Weaknesses

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its 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
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We recommend a housing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which becomes key in the context of child health protection. Additionally, tiny parts of these devices can complicate diagnosis medical after entering the body.
  • With mass production the cost of neodymium magnets can be a barrier,

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what affects it?

Information about lifting capacity was determined for optimal configuration, taking into account:
  • with the contact of a yoke made of special test steel, guaranteeing maximum field concentration
  • with a cross-section of at least 10 mm
  • with an ground touching surface
  • with direct contact (without coatings)
  • for force acting at a right angle (pull-off, not shear)
  • at standard ambient temperature

Lifting capacity in practice – influencing factors

In practice, the actual holding force depends on several key aspects, ranked from most significant:
  • Distance (betwixt the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of maximum force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
  • Steel grade – the best choice is pure iron steel. Cast iron may attract less.
  • Base smoothness – the smoother and more polished the plate, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, in contrast under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a slight gap between the magnet’s surface and the plate reduces the holding force.

H&S for magnets
Combustion hazard

Powder generated during cutting of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Magnet fragility

Despite metallic appearance, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Bodily injuries

Mind your fingers. Two powerful magnets will join immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Life threat

Warning for patients: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or ask another person to work with the magnets.

Allergic reactions

Certain individuals experience a sensitization to nickel, which is the common plating for NdFeB magnets. Prolonged contact can result in skin redness. We strongly advise use protective gloves.

Phone sensors

Note: neodymium magnets generate a field that disrupts precision electronics. Keep a separation from your mobile, device, and GPS.

Heat sensitivity

Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. The loss of strength is permanent.

Magnetic media

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

Caution required

Handle with care. Rare earth magnets attract from a long distance and connect with massive power, often faster than you can react.

Keep away from children

Strictly store magnets away from children. Ingestion danger is high, and the consequences of magnets connecting inside the body are very dangerous.

Security! Details about risks in the article: Magnet Safety Guide.