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

search holder

Catalog no 210452

GTIN/EAN: 5906301814122

5.00

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

Magnetic Flux

~ 20 000 Gauss [±5%]

see parameters »

245.00 ZŁ with VAT / pcs + price for transport

199.19 ZŁ net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety
Not sure where to buy?

Give us a call +48 22 499 98 98 if you prefer get in touch by means of request form our website.
Strength as well as shape of a neodymium magnet can be calculated on our power calculator.

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

💡 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!

Technical parameters - 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
remenance Br [min. - max.] ? 12.9-13.2 kGs
remenance Br [min. - max.] ? 1290-1320 mT
coercivity bHc ? 10.8-12.0 kOe
coercivity bHc ? 860-955 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 40-42 BH max MGOe
energy density [min. - max.] ? 318-334 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
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%
Sustainability
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
Magnet Unit Converter
Magnet pull force
Magnetic Field
Enter data in one of the inputs, to see the rest change in real-time.

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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. It is equipment that can handle pulling heavy and silted objects from the river bottom. For beginners, we recommend lighter single-sided models (F80-F200), for advanced users - heavier double-sided (Two-Side) ones.
Double-sided holders (Two-Side) have two active magnetic surfaces and two mounting holes. The side eyelet ensures the magnet doesn't stand sideways or "on edge" during pulling. 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). 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). A full set usually contains: magnet, polypropylene rope with appropriate strength, protective gloves, hook, and carabiner. We recommend always securing the thread with glue or tightening the eyelet firmly before first use.
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. It is worth acting responsibly, cleaning up after yourself, and caring for the environment by removing fished-out scrap.
In contrast to other brands, Dhit does not cut corners on components, which translates into a clear advantage during treasure hunting.
The unique way of gluing and seating the magnet in the protective cup creates a solid structure that absorbs impacts while fishing on difficult, rocky bottoms.
Many sellers employ a tactic by advertising the pull force measured exclusively on the vertical mount. Crucially, in the web, there are virtually no videos testing the real side-pull force of competitor products on the lateral attachment.
{By choosing Dhit, you support a local market leader that knows the specifics of local rivers and lakes. Every mount is individually inspected before delivery, which guarantees that you the set will be of the highest quality.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Pros

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • They retain magnetic properties for almost 10 years – the drop is just ~1% (according to analyses),
  • They maintain their magnetic properties even under close interference source,
  • By using a lustrous coating of nickel, the element gains an elegant look,
  • Magnetic induction on the working layer of the magnet turns out to be strong,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of accurate machining and adapting to defined requirements,
  • Huge importance in advanced technology sectors – they are commonly used in data components, brushless drives, medical equipment, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in miniature devices

Disadvantages

Cons of neodymium magnets and proposals for their use:
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its 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 and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • Limited ability of producing nuts in the magnet and complicated shapes - preferred is casing - mounting mechanism.
  • Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small components of these products are able to complicate diagnosis medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Magnetic strength at its maximum – what affects it?

The lifting capacity listed is a result of laboratory testing conducted under standard conditions:
  • with the use of a yoke made of special test steel, ensuring full magnetic saturation
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • with a surface perfectly flat
  • with total lack of distance (without impurities)
  • during detachment in a direction perpendicular to the plane
  • in stable room temperature

Key elements affecting lifting force

In practice, the actual holding force depends on several key aspects, presented from crucial:
  • Clearance – the presence of any layer (rust, tape, gap) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
  • Angle of force application – highest force is reached only during pulling at a 90° angle. The force required to slide of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Plate thickness – insufficiently thick plate does not close the flux, causing part of the flux to be escaped into the air.
  • Steel grade – the best choice is pure iron steel. Hardened steels may attract less.
  • Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
  • Thermal environment – heating the magnet results in weakening of force. Check the thermal limit for a given model.

Lifting capacity was measured using a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate lowers the lifting capacity.

Precautions when working with neodymium magnets
Implant safety

Patients with a ICD must keep an large gap from magnets. The magnetic field can interfere with the operation of the implant.

Keep away from computers

Do not bring magnets close to a purse, laptop, or TV. The magnetic field can destroy these devices and erase data from cards.

Eye protection

Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Pinching danger

Big blocks can break fingers in a fraction of a second. Under no circumstances put your hand between two strong magnets.

Impact on smartphones

An intense magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Keep magnets close to a device to prevent breaking the sensors.

Fire risk

Machining of NdFeB material carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Permanent damage

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

Handling guide

Before use, read the rules. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Choking Hazard

Adult use only. Small elements pose a choking risk, causing serious injuries. Store away from children and animals.

Metal Allergy

Studies show that the nickel plating (standard magnet coating) is a potent allergen. If your skin reacts to metals, refrain from touching magnets with bare hands or choose coated magnets.

Safety First! More info about risks in the article: Magnet Safety Guide.