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UMP 94x40 [3xM10] GW F550 Silver Black / N52 - search holder

search holder

Catalog no 210490

GTIN/EAN: 5906301814146

5.00

Diameter Ø

94 mm [±1 mm]

Height

40 mm [±1 mm]

Weight

2262 g

Magnetization Direction

↑ axial

Load capacity

650.00 kg / 6374.32 N

Coating

[Epoxy] Epoxy

Magnetic Flux

~ 11 000 Gauss [±5%]

see specifications »

350.00 ZŁ with VAT / pcs + price for transport

284.55 ZŁ net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety
Can't decide what to choose?

Call us +48 888 99 98 98 otherwise let us know by means of form through our site.
Lifting power and structure of magnetic components can be checked on our modular calculator.

Orders submitted before 14:00 will be dispatched 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 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 details - UMP 94x40 [3xM10] GW F550 Silver Black / N52 - search holder

Specification / characteristics - UMP 94x40 [3xM10] GW F550 Silver Black / N52 - search holder

properties
properties values
Cat. no. 210490
GTIN/EAN 5906301814146
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 94 mm [±1 mm]
Height 40 mm [±1 mm]
Weight 2262 g
Magnetization Direction ↑ axial
Load capacity ~ ? 650.00 kg / 6374.32 N
Coating [Epoxy] Epoxy
Series SilverBlack
Holder Type 2 sided
Material Type Structural steel S235 (ferrous)
Magnetic Flux ~ 11 000 Gauss [±5%]
Size/Mount Quantity 3xM10
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics UMP 94x40 [3xM10] GW F550 Silver Black / N52 - search holder
properties values units
remenance Br [min. - max.] ? 14.2-14.7 kGs
remenance Br [min. - max.] ? 1420-1470 mT
coercivity bHc ? 10.8-12.5 kOe
coercivity bHc ? 860-995 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 48-53 BH max MGOe
energy density [min. - max.] ? 380-422 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
Technical and environmental data
Chemical composition
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: 210490-2026
Measurement Calculator
Magnet pull force
Field Strength
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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. 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. Top mounting works well when fishing from a bridge, pier, or well (vertical technique). 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. 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.
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.
If you find a dangerous object (unexploded ordnance) or an antique, you have a legal obligation to report it to appropriate services (Police, conservator). We recommend familiarizing yourself with current local regulations and heritage protection laws.
By selecting the Dhit brand, you get a higher quality standard and true magnetic power for the average cost.
Most competitor mounts have weak shells that deform during the any strong impact against underwater obstacles.
Many sellers employ a tactic by advertising the power tested only on the top hook. The Dhit brand focuses on full transparency by providing the real parameters of the gear, so you avoid disappointment during treasure hunting.
{In contrast to competitors importing from China, Dhit provides full support and instant warranty help, which is crucial after the purchase. Don't risk it with unknown goods, stick with the market leader that ensures the happiness of searcher.

Advantages and disadvantages of neodymium magnets.

Benefits

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • Their strength is durable, and after approximately ten years it drops only by ~1% (theoretically),
  • Magnets very well defend themselves against loss of magnetization caused by ambient magnetic noise,
  • The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to look better,
  • Magnetic induction on the working part of the magnet is exceptional,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of accurate modeling as well as modifying to defined requirements,
  • Wide application in future technologies – they serve a role in data components, electromotive mechanisms, medical equipment, as well as other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in miniature devices

Disadvantages

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • At very strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • We suggest cover - magnetic mount, due to difficulties in creating nuts inside the magnet and complicated forms.
  • Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products are able to be problematic in diagnostics medical when they are in the body.
  • Due to complex production process, their price exceeds standard values,

Pull force analysis

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

Breakaway force is the result of a measurement for optimal configuration, including:
  • with the contact of a yoke made of special test steel, ensuring maximum field concentration
  • with a thickness minimum 10 mm
  • characterized by lack of roughness
  • with total lack of distance (no paint)
  • for force acting at a right angle (in the magnet axis)
  • at conditions approx. 20°C

Determinants of practical lifting force of a magnet

Please note that the magnet holding will differ depending on the following factors, starting with the most relevant:
  • Gap (between the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
  • Base massiveness – insufficiently thick steel does not close the flux, causing part of the power to be escaped into the air.
  • Material type – the best choice is high-permeability steel. Hardened steels may generate lower lifting capacity.
  • Surface finish – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
  • Temperature influence – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, however under shearing force the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate decreases the load capacity.

Warnings
Beware of splinters

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

Dust is flammable

Fire warning: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.

Electronic devices

Do not bring magnets near a wallet, computer, or TV. The magnetism can permanently damage these devices and erase data from cards.

Keep away from children

Neodymium magnets are not toys. Swallowing multiple magnets may result in them connecting inside the digestive tract, which poses a direct threat to life and necessitates urgent medical intervention.

Permanent damage

Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.

Precision electronics

A strong magnetic field disrupts the operation of compasses in smartphones and GPS navigation. Keep magnets near a smartphone to prevent breaking the sensors.

Medical implants

Health Alert: Neodymium magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Nickel coating and allergies

Certain individuals suffer from a sensitization to Ni, which is the common plating for neodymium magnets. Frequent touching might lead to a rash. We recommend wear safety gloves.

Finger safety

Danger of trauma: The attraction force is so great that it can result in hematomas, crushing, and broken bones. Use thick gloves.

Handling guide

Before use, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Caution! Learn more about hazards in the article: Safety of working with magnets.