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

search holder

Catalog no 210491

GTIN/EAN: 5906301814153

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%]

technical parameters »

400.00 ZŁ with VAT / pcs + price for transport

325.20 ZŁ net + 23% VAT / pcs

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Contact us by phone +48 888 99 98 98 if you prefer get in touch via our online form the contact section.
Parameters along with form of magnets can be checked with our force 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 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 - UMP 94x40 [3xM10] GW F550 Silver Black Lina / N52 - search holder

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

properties
properties values
Cat. no. 210491
GTIN/EAN 5906301814153
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%]
Rope Length 25 m
Rope Capacity ~ 1595 kg
Rope Diameter Ø 8 mm
Gloves 1 pair
Size/Mount Quantity 3xM10
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics UMP 94x40 [3xM10] GW F550 Silver Black Lina / 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 specification and ecology
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: 210491-2026
Quick Unit Converter
Force (pull)
Field Strength
Put your value in a single field to receive results for the other units immediately.

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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. This specific magnet ensures a laboratory lifting capacity of up to 650.00 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).
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. The double-sided version increases search efficiency by 100%.
This construction protects the brittle neodymium from direct impact against stones and the bottom. 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.
Check the product title and description to see if you are buying just the magnet or the XL set. 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.
The capacity given in the name (e.g., 650.00 kg) is the maximum value measured in laboratory conditions. In a river, objects are often rusty, silted, or irregular in shape (e.g., pipes), which drastically reduces grip strength. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.
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.
By choosing Dhit GOLD mounts, you receive a product of a significantly higher standard and true magnetic power for the same market price.
The GOLD series feature a robust construction that provides a true shield for the brittle neodymium.
Many distributors employ a tactic by promoting the power tested exclusively on the top hook. Interestingly, in the entire internet, there are virtually no videos demonstrating the actual strength of other brands on the side hook.
{Unlike competitors importing from China, Dhit provides expert advice and real service assistance, which is crucial after the transaction. Instead of risking with unknown goods, it is better to choose proven gear that ensures the happiness of every user.

Pros and cons of Nd2Fe14B magnets.

Strengths

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • Their strength is maintained, and after approximately 10 years it drops only by ~1% (theoretically),
  • Magnets very well protect themselves against loss of magnetization caused by ambient magnetic noise,
  • The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to look better,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Considering the possibility of accurate shaping and customization to unique projects, magnetic components can be produced in a broad palette of shapes and sizes, which increases their versatility,
  • Wide application in advanced technology sectors – they are commonly used in hard drives, motor assemblies, precision medical tools, and industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:
  • At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. 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 while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We recommend a housing - magnetic mount, due to difficulties in producing nuts inside the magnet and complicated forms.
  • Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these magnets are able to disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

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

Magnet power was determined for ideal contact conditions, taking into account:
  • with the application of a sheet made of special test steel, ensuring full magnetic saturation
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • with an ground touching surface
  • without any insulating layer between the magnet and steel
  • under perpendicular force vector (90-degree angle)
  • at room temperature

Practical lifting capacity: influencing factors

During everyday use, the actual lifting capacity results from several key aspects, presented from the most important:
  • Gap between surfaces – every millimeter of distance (caused e.g. by varnish or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Steel type – mild steel attracts best. Alloy admixtures lower magnetic properties and lifting capacity.
  • Plate texture – ground elements guarantee perfect abutment, which increases field saturation. Uneven metal reduce efficiency.
  • Heat – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate lowers the holding force.

Warnings
Swallowing risk

These products are not suitable for play. Eating several magnets may result in them pinching intestinal walls, which poses a direct threat to life and requires immediate surgery.

Crushing risk

Watch your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying anything in their path. Be careful!

Do not drill into magnets

Dust produced during machining of magnets is combustible. Do not drill into magnets unless you are an expert.

Permanent damage

Control the heat. Heating the magnet to high heat will permanently weaken its magnetic structure and strength.

Protective goggles

NdFeB magnets are sintered ceramics, meaning they are very brittle. Impact of two magnets leads to them shattering into shards.

Caution required

Handle with care. Neodymium magnets attract from a distance and snap with massive power, often quicker than you can move away.

Keep away from computers

Very strong magnetic fields can corrupt files on payment cards, HDDs, and other magnetic media. Maintain a gap of at least 10 cm.

Nickel allergy

Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands or select coated magnets.

GPS and phone interference

A strong magnetic field negatively affects the operation of compasses in phones and GPS navigation. Maintain magnets near a smartphone to avoid breaking the sensors.

Health Danger

Medical warning: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Safety First! Need more info? Read our article: Are neodymium magnets dangerous?