FAQ
Order Status

tel: +48 22 499 98 98

Neodymium magnets: power you're looking for

Want to buy really powerful magnets? We have in stock complete range of various shapes and sizes. They are ideal for home use, workshop and model making. See products available immediately.

discover price list and dimensions

Equipment for treasure hunters

Begin your hobby involving underwater treasure hunting! Our double-handle grips (F200, F400) provide safety guarantee and huge lifting capacity. Solid, corrosion-resistant housing and reinforced ropes are reliable in any water.

find searching equipment

Industrial magnetic grips mounting

Professional solutions for fixing non-invasive. Threaded grips (M8, M10, M12) provide quick improvement of work on warehouses. Perfect for installing lamps, sensors and ads.

check technical specs

🚚 Order by 14:00 – we'll ship today!

Dhit sp. z o.o.
0
0.00 ZŁ
  1. home
  2. magnetic handles for searching
  3. search magnet ump 94x40 [3xm10] gw f550 silver black / n52
← previous
next →
Product available Ships today (order by 14:00)

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%]

check technical specifications »

350.00 ZŁ with VAT / pcs + price for transport

284.55 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
284.55 ZŁ
350.00 ZŁ
price from 5 pcs
267.48 ZŁ
329.00 ZŁ
price from 10 pcs
250.40 ZŁ
308.00 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Can't decide what to choose?

Pick up the phone and ask +48 22 499 98 98 alternatively get in touch using inquiry form through our site.
Specifications as well as structure of magnets can be analyzed using our magnetic mass 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 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!

Product card - 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
Engineering data and GPSR
Material specification
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: 210490-2026
Magnet Unit Converter
Force (pull)
Magnetic Induction
Enter a value in one of the inputs, to see all other values will update in real-time.

See more deals

MW 8x1.5 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 8x1.5 / N38 - cylindrical magnet

0.455 ZŁ brutto / pcs
UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread
Product available Ships today (order by 14:00)

UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread

8.61 ZŁ brutto / pcs
UMGZ 75x34x18 [M10] GZ / N38 - magnetic holder external thread
Product available Ships today (order by 14:00)

UMGZ 75x34x18 [M10] GZ / N38 - magnetic holder external thread

189.42 ZŁ brutto / pcs
MW 12x4 / N52 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 12x4 / N52 - cylindrical magnet

2.18 ZŁ brutto / pcs
It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. 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. Top mounting works well when fishing from a bridge, pier, or well (vertical technique). 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.
Most of our starter kits are complete and ready to use. We often add thread glue to secure the eyelet against unscrewing in water. 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. 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. Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.
It is the best value because for the same money, you obtain professional-grade equipment that will last for many seasons than generic imports.
Dhit GOLD mounts utilize heavy-duty, thick-walled steel that provides a true shield for the brittle neodymium.
Many sellers use a trick by advertising the pull force tested exclusively on the top hook. GOLD mounts guarantees honest data by providing the actual capabilities of the gear, so you can be sure during real field work.
{By choosing Dhit, you support Polish engineering that perfectly understands the conditions of local rivers and lakes. Don't risk it with unknown goods, it is better to choose the market leader that ensures the satisfaction of searcher.

Strengths as well as weaknesses of rare earth magnets.

Pros

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They do not lose magnetism, even over approximately ten years – the decrease in strength is only ~1% (theoretically),
  • They feature excellent resistance to weakening of magnetic properties as a result of opposing magnetic fields,
  • A magnet with a metallic silver surface has an effective appearance,
  • They are known for high magnetic induction at the operating surface, which increases their power,
  • Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
  • Due to the option of accurate molding and adaptation to custom projects, NdFeB magnets can be modeled in a wide range of shapes and sizes, which amplifies use scope,
  • Wide application in electronics industry – they serve a role in computer drives, drive modules, diagnostic systems, as well as complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

What to avoid - cons of neodymium magnets: application proposals
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
  • 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, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating threads and complex shapes in magnets, we recommend using a housing - magnetic mechanism.
  • Potential hazard related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Additionally, tiny parts of these products are able to disrupt the diagnostic process 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

Highest magnetic holding force – what contributes to it?

The specified lifting capacity refers to the limit force, recorded under optimal environment, namely:
  • using a base made of low-carbon steel, acting as a ideal flux conductor
  • possessing a thickness of min. 10 mm to ensure full flux closure
  • characterized by lack of roughness
  • with zero gap (without paint)
  • under perpendicular application of breakaway force (90-degree angle)
  • at temperature room level

Impact of factors on magnetic holding capacity in practice

In real-world applications, the actual lifting capacity depends on several key aspects, listed from the most important:
  • Space between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Load vector – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Plate material – mild steel attracts best. Alloy admixtures lower magnetic properties and lifting capacity.
  • Surface structure – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Temperature – temperature increase results in weakening of force. Check the thermal limit for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under parallel forces the holding force is lower. In addition, even a small distance between the magnet and the plate reduces the load capacity.

Precautions when working with NdFeB magnets
Magnetic media

Do not bring magnets near a purse, laptop, or screen. The magnetism can permanently damage these devices and wipe information from cards.

Magnetic interference

Navigation devices and smartphones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

This is not a toy

Absolutely keep magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are life-threatening.

Nickel allergy

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If redness occurs, immediately stop working with magnets and use protective gear.

Implant safety

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.

Heat warning

Avoid heat. Neodymium magnets are sensitive to temperature. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).

Respect the power

Be careful. Rare earth magnets attract from a long distance and snap with massive power, often quicker than you can react.

Magnets are brittle

Despite metallic appearance, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Crushing force

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

Dust explosion hazard

Dust produced during grinding of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.

Warning! Want to know more? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98