Product available Ships tomorrow

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

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

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 specifications »

400.00 ZŁ with VAT / pcs + price for transport

325.20 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure where to buy?

Give us a call +48 888 99 98 98 if you prefer drop us a message by means of contact form the contact form page.
Lifting power as well as structure of magnets can be tested with our online calculation tool.

Orders submitted before 14:00 will be dispatched today!

💡 Guide: How to choose a decent magnet and not get ripped off?

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 details - 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

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%

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: 210491-2026

Measurement Calculator

Magnet pull force

Newtons (N)

lbs

Magnetic Induction

Gauss (Gs)

Tesla (T)

Just populate any input, to let the converter fill in everything else automatically.

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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 double-sided model attracts from above and below, increasing the chance of hooking a find. Side mounting is ideal for throwing from the shore, as the magnet drags flat along the bottom. Single-sided magnets are usually lighter and cheaper but less effective for long throws.

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.

We offer both standalone holders and ready-made gift sets (depending on the selected option in the store). In the package, you will find everything needed: strong rope (e.g., 20m), gloves, and hardware. 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. 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.

Unlike many market offers, Dhit uses the highest quality materials, which translates into a clear advantage during every trip to the water.

Most competitor mounts have weak shells that deform during the any strong impact against underwater obstacles.

Many distributors use a trick by advertising the pull force measured only on the top hook. The Dhit brand focuses on full transparency by providing the actual capabilities of the magnet, so you avoid disappointment during real field work.

{By choosing GOLD mounts, you support Polish engineering that perfectly understands the specifics of local rivers and lakes. Every product is checked before shipping, which ensures that you receive equipment of the defect-free.

Advantages and disadvantages of rare earth magnets.

Advantages

Besides their remarkable pulling force, neodymium magnets offer the following advantages:

They have constant strength, and over around 10 years their attraction force decreases symbolically – ~1% (according to theory),
Magnets perfectly defend themselves against demagnetization caused by external fields,
In other words, due to the smooth surface of gold, the element gains visual value,
Neodymium magnets deliver maximum magnetic induction on a contact point, which ensures high operational effectiveness,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Thanks to modularity in designing and the capacity to modify to specific needs,
Versatile presence in future technologies – they are commonly used in HDD drives, brushless drives, medical equipment, and multitasking production systems.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Weaknesses

Characteristics of disadvantages of neodymium magnets: application proposals

They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
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.
When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
Due to limitations in producing nuts and complex shapes in magnets, we propose using a housing - magnetic mount.
Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these devices are able to complicate diagnosis medical in case of swallowing.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Magnetic strength at its maximum – what contributes to it?

Information about lifting capacity is the result of a measurement for ideal contact conditions, assuming:

on a plate made of mild steel, optimally conducting the magnetic flux
possessing a thickness of at least 10 mm to ensure full flux closure
with an ground contact surface
under conditions of ideal adhesion (metal-to-metal)
for force acting at a right angle (in the magnet axis)
at conditions approx. 20°C

Lifting capacity in practice – influencing factors

Holding efficiency impacted by working environment parameters, such as (from most important):

Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
Load vector – maximum parameter is reached only during pulling at a 90° angle. The shear force of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
Metal type – different alloys reacts the same. Alloy additives worsen the interaction with the magnet.
Plate texture – ground elements guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate decreases the load capacity.

Safe handling of neodymium magnets

Machining danger

Dust generated during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Nickel coating and allergies

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If skin irritation appears, immediately stop handling magnets and use protective gear.

Hand protection

Large magnets can crush fingers instantly. Do not place your hand between two attracting surfaces.

Health Danger

For implant holders: Powerful magnets affect electronics. Maintain minimum 30 cm distance or request help to handle the magnets.

Safe operation

Exercise caution. Neodymium magnets act from a long distance and connect with huge force, often faster than you can move away.

Swallowing risk

These products are not intended for children. Accidental ingestion of several magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and requires urgent medical intervention.

Magnetic media

Very strong magnetic fields can erase data on credit cards, hard drives, and storage devices. Stay away of at least 10 cm.

Operating temperature

Regular neodymium magnets (grade N) lose power when the temperature goes above 80°C. This process is irreversible.

Eye protection

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

GPS and phone interference

GPS units and smartphones are highly susceptible to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the internal compass in your phone.

Safety First! Need more info? Check our post: Are neodymium magnets dangerous?

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

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

Magnetic properties of material N52

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Material specification

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Induction

Other products

SM 25x200 [2xM8] / N42 - magnetic separator

MPL 20x3x2 / N38 - lamellar magnet

SM 25x150 [2xM8] / N52 - magnetic separator

UI 45x13x5 [M301] / N38 - badge holder

Advantages and disadvantages of rare earth magnets.

Advantages

Weaknesses

Holding force characteristics

Magnetic strength at its maximum – what contributes to it?

Lifting capacity in practice – influencing factors

Safe handling of neodymium magnets

Machining danger

Nickel coating and allergies

Hand protection

Health Danger

Safe operation

Swallowing risk

Magnetic media

Operating temperature

Eye protection

GPS and phone interference

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C