Product available Ships tomorrow

UMP 107x40 [M8+M10] GW F400 Lina / N38 - 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 210384

GTIN/EAN: 5906301814030

5.00

Diameter Ø

107 mm [±1 mm]

Height

40 mm [±1 mm]

Weight

2350 g

Load capacity

480.00 kg / 4707.19 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 8 000 Gauss [±5%]

view technical specifications »

450.00 ZŁ with VAT / pcs + price for transport

365.85 ZŁ net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Contact us by phone +48 888 99 98 98 alternatively send us a note by means of contact form the contact form page.
Strength and form of magnetic components can be analyzed using our modular calculator.

Same-day processing for orders placed before 14:00.

💡 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!

Product card - UMP 107x40 [M8+M10] GW F400 Lina / N38 - search holder

Specification / characteristics - UMP 107x40 [M8+M10] GW F400 Lina / N38 - search holder

properties

properties	values
Cat. no.	210384
GTIN/EAN	5906301814030
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	107 mm [±1 mm]
Height	40 mm [±1 mm]
Weight	2350 g
Load capacity ~ ?	480.00 kg / 4707.19 N
Coating	[NiCuNi] Nickel
Holder Type	2 sided
Material Type	Structural steel S235 (ferrous)
Magnetic Flux	~ 8 000 Gauss [±5%]
Rope Length	25 m
Rope Capacity	~ 1595 kg
Rope Diameter	Ø 8 mm
Gloves	1 pair
Size/Mount Quantity	1xM8/2xM10
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 107x40 [M8+M10] GW F400 Lina / N38 - search holder

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	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

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%

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: 210384-2026

Measurement Calculator

Force (pull)

Kilograms (kg)

Force in lbs

Field Strength

Tesla (T)

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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 480.00 kg, which translates into high effectiveness in water. For beginners, we recommend lighter single-sided models (F80-F200), for advanced users - heavier double-sided (Two-Side) ones.

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. The double-sided version increases search efficiency by 100%.

This construction protects the brittle neodymium from direct impact against stones and the bottom. The housing significantly increases lifespan but does not make the magnet completely indestructible. After each fishing trip, we recommend rinsing the magnet with fresh water and drying it.

Most of our starter kits are complete and ready to use. 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. 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. It is worth acting responsibly, cleaning up after yourself, and caring for the environment by removing fished-out scrap.

In contrast to other brands, Dhit uses the highest quality materials, which translates into a clear advantage during treasure hunting.

As a result, despite the market price, the lifespan of the GOLD mount puts it far ahead of the competition.

Many sellers use a trick by promoting the pull force measured exclusively on the top hook. The Dhit brand guarantees full transparency by providing the real parameters of the magnet, so you can be sure during real field work.

{By choosing GOLD mounts, you support Polish engineering that perfectly understands the specifics of local rivers and lakes. Don't risk it with unknown goods, it is better to choose proven gear that cares about the satisfaction of searcher.

Pros and cons of neodymium magnets.

Advantages

Apart from their strong magnetic energy, neodymium magnets have these key benefits:

They virtually do not lose strength, because even after ten years the performance loss is only ~1% (in laboratory conditions),
They maintain their magnetic properties even under strong external field,
The use of an elegant finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
The surface of neodymium magnets generates a concentrated magnetic field – this is a distinguishing feature,
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 versatility in constructing and the ability to adapt to individual projects,
Wide application in future technologies – they find application in mass storage devices, brushless drives, medical equipment, also modern systems.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in compact constructions

Limitations

What to avoid - cons of neodymium magnets and ways of using them

At very strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength 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
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
Due to limitations in creating threads and complex shapes in magnets, we propose using a housing - magnetic mount.
Potential hazard to health – tiny shards of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. Additionally, small components of these products can complicate diagnosis medical in case of swallowing.
With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum holding power of the magnet – what affects it?

Information about lifting capacity is the result of a measurement for optimal configuration, including:

on a block made of structural steel, perfectly concentrating the magnetic flux
whose transverse dimension reaches at least 10 mm
with a surface perfectly flat
under conditions of ideal adhesion (metal-to-metal)
during detachment in a direction perpendicular to the mounting surface
in stable room temperature

Determinants of practical lifting force of a magnet

Bear in mind that the magnet holding will differ depending on the following factors, in order of importance:

Clearance – existence of any layer (paint, dirt, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
Plate material – low-carbon steel gives the best results. Alloy steels reduce magnetic permeability and holding force.
Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces weaken the grip.
Thermal environment – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate reduces the holding force.

Warnings

Magnet fragility

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. Wear goggles.

Metal Allergy

Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If an allergic reaction occurs, cease handling magnets and wear gloves.

Implant safety

Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.

Keep away from children

These products are not intended for children. Accidental ingestion of several magnets may result in them pinching intestinal walls, which constitutes a critical condition and requires urgent medical intervention.

Compass and GPS

Navigation devices and mobile phones are extremely susceptible to magnetism. Direct contact with a strong magnet can decalibrate the sensors in your phone.

Respect the power

Use magnets consciously. Their huge power can surprise even professionals. Plan your moves and do not underestimate their force.

Power loss in heat

Do not overheat. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).

Combustion hazard

Mechanical processing of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Physical harm

Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!

Magnetic media

Very strong magnetic fields can destroy records on credit cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.

Caution! Need more info? Read our article: Why are neodymium magnets dangerous?

UMP 107x40 [M8+M10] GW F400 Lina / N38 - search holder

Product card - UMP 107x40 [M8+M10] GW F400 Lina / N38 - search holder

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Ecology and recycling (GPSR)

Force (pull)

Field Strength

View more proposals

SM 18x175 [2xM5] / N42 - magnetic separator

MW 9.5x1 / N38 - cylindrical magnet

SM 32x375 [2xM8] / N52 - magnetic separator

MW 15x10 / N38 - cylindrical magnet

Pros and cons of neodymium magnets.

Advantages

Limitations

Pull force analysis

Maximum holding power of the magnet – what affects it?

Determinants of practical lifting force of a magnet

Warnings

Magnet fragility

Metal Allergy

Implant safety

Keep away from children

Compass and GPS

Respect the power

Power loss in heat

Combustion hazard

Physical harm

Magnetic media

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C