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

search holder

Catalog no 210421

GTIN/EAN: 5906301814061

5.00

Diameter Ø

75 mm [±1 mm]

Height

25 mm [±1 mm]

Weight

900 g

Load capacity

310.00 kg / 3040.06 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 8 000 Gauss [±5%]

see parameters »

150.00 ZŁ with VAT / pcs + price for transport

121.95 ZŁ net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety
Not sure about your choice?

Call us +48 22 499 98 98 alternatively get in touch via our online form the contact form page.
Lifting power as well as shape of a magnet can be tested on our force calculator.

Orders submitted before 14:00 will be dispatched today!

💡 Check why professionals choose Dhit over cheap substitutes

Instead of believing fairy tales on YouTube with tests on uncertified equipment, see what really determines your magnet's power:

  • 📏 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 / N42 - search holder

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

properties
properties values
Cat. no. 210421
GTIN/EAN 5906301814061
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 900 g
Load capacity ~ ? 310.00 kg / 3040.06 N
Coating [NiCuNi] Nickel
Series GOLD
Holder Type 2 sided
Material Type Structural steel S235 (ferrous)
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 3xM10
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics UMP 75x25 [M10x3] GW F200 GOLD / 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%
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: 210421-2026
Measurement Calculator
Force (pull)
Magnetic Field
Input your value in just one slot to see the conversion in all other units right away.

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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. Model UMP 75x25 [M10x3] GW F200 GOLD / N42 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 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. The side eyelet ensures the magnet doesn't stand sideways or "on edge" during pulling. 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). 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). We often add thread glue to secure the eyelet against unscrewing in water. Using thread glue is crucial to not lose the magnet in silt.
This force applies to perfect adherence with the entire surface to a smooth, clean steel plate with a min. thickness of 20mm. In a river, objects are often rusty, silted, or irregular in shape (e.g., pipes), which drastically reduces grip strength. 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.
It is the best value because for the identical price, you obtain professional-grade equipment that will serve you for much longer than generic imports.
Most magnets on the market have weak shells that crack during the any strong impact against concrete or rocks.
Many distributors employ a tactic by advertising the pull force measured exclusively on the top hook. Interestingly, 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 bet on a local market leader that perfectly understands the specifics of local rivers and lakes. Every mount is checked before delivery, which ensures that you receive equipment of the defect-free.

Strengths and weaknesses of Nd2Fe14B magnets.

Strengths

Besides their high retention, neodymium magnets are valued for these benefits:
  • Their strength remains stable, and after approximately 10 years it drops only by ~1% (according to research),
  • Magnets perfectly resist against loss of magnetization caused by ambient magnetic noise,
  • By using a decorative layer of silver, the element has an modern look,
  • Neodymium magnets achieve maximum magnetic induction on a contact point, which ensures high operational effectiveness,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures approaching 230°C and above...
  • Thanks to freedom in forming and the capacity to customize to unusual requirements,
  • Wide application in future technologies – they serve a role in data components, electromotive mechanisms, medical equipment, also technologically advanced constructions.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Weaknesses

Characteristics of disadvantages of neodymium magnets: tips and applications.
  • 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 decrease 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 durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We recommend a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complicated shapes.
  • Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these magnets can complicate diagnosis medical after entering the body.
  • With mass production the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum lifting force for a neodymium magnet – what it depends on?

The specified lifting capacity concerns the limit force, measured under optimal environment, meaning:
  • with the contact of a sheet made of special test steel, guaranteeing maximum field concentration
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • with a surface perfectly flat
  • without any clearance between the magnet and steel
  • under axial force vector (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

It is worth knowing that the magnet holding may be lower subject to the following factors, starting with the most relevant:
  • Clearance – existence of foreign body (rust, tape, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Angle of force application – maximum parameter is obtained only during perpendicular pulling. The force required to slide of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Plate material – low-carbon steel gives the best results. Alloy steels decrease magnetic properties and holding force.
  • Surface finish – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Safe handling of neodymium magnets
Fire risk

Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Threat to navigation

GPS units and smartphones are extremely susceptible to magnetism. Close proximity with a strong magnet can decalibrate the internal compass in your phone.

Conscious usage

Handle magnets consciously. Their powerful strength can surprise even professionals. Plan your moves and do not underestimate their power.

Safe distance

Device Safety: Strong magnets can damage payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Power loss in heat

Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and pulling force.

Bone fractures

Big blocks can smash fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Protective goggles

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

Sensitization to coating

It is widely known that nickel (standard magnet coating) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands and opt for versions in plastic housing.

Swallowing risk

Product intended for adults. Tiny parts can be swallowed, leading to intestinal necrosis. Store away from kids and pets.

Implant safety

Health Alert: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have electronic implants.

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