Product available Ships today (order by 14:00)

UMP 107x40 [M8+M10] GW F 400 kg / 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 210338

GTIN/EAN: 5906301813972

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

~ 10 000 Gauss [±5%]

product 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

Looking for a better price?

Pick up the phone and ask +48 22 499 98 98 or send us a note using inquiry form the contact form page.
Parameters as well as structure of a magnet can be calculated on our power calculator.

Orders placed before 14:00 will be shipped the same business day.

💡 Check why professionals choose Dhit over cheap substitutes

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 107x40 [M8+M10] GW F 400 kg / N38 - search holder

Specification / characteristics - UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder

properties

properties	values
Cat. no.	210338
GTIN/EAN	5906301813972
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	~ 10 000 Gauss [±5%]
Size/Mount Quantity	2xM8/1xM10
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 107x40 [M8+M10] GW F 400 kg / 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 specification and ecology

Elemental analysis

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: 210338-2026

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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. Model UMP 107x40 [M8+M10] GW F 400 kg / N38 offers an optimal weight-to-pull force ratio, which is important for repeated throwing. For beginners, we recommend lighter single-sided models (F80-F200), for advanced users - heavier double-sided (Two-Side) ones.

The 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. 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. 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. A full set usually contains: magnet, polypropylene rope with appropriate strength, protective gloves, hook, and carabiner. Using thread glue is crucial to not lose the magnet in silt.

This force applies to perfect adherence with the entire surface to a smooth, clean steel plate with a min. thickness of 20mm. Dirt, rust, paint, and algae create a distance that weakens the magnet by even 70-80%. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.

Searches are allowed as long as you do not interfere with archaeological sites or search for weapons. It is worth acting responsibly, cleaning up after yourself, and caring for the environment by removing fished-out scrap.

It is the best value because for the same money, you buy professional-grade equipment that will serve you for many seasons than generic imports.

The GOLD series utilize heavy-duty, thick-walled steel that acts as a real armor for the magnetic core.

Many distributors employ a tactic by advertising the pull force measured exclusively on the vertical mount. The Dhit brand focuses on full transparency by stating the real parameters of the gear, so you can be sure during real field work.

{By choosing Dhit, you support a local market leader that knows the conditions of local rivers and lakes. Instead of risking with unknown goods, it is better to choose proven gear that cares about the happiness of searcher.

Pros as well as cons of Nd₂Fe₁₄B magnets.

Strengths

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:

They virtually do not lose power, because even after ten years the performance loss is only ~1% (in laboratory conditions),
They are noted for resistance to demagnetization induced by presence of other magnetic fields,
Thanks to the reflective finish, the coating of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
The surface of neodymium magnets generates a concentrated magnetic field – this is one of their assets,
Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
Possibility of accurate shaping as well as modifying to complex requirements,
Versatile presence in high-tech industry – they serve a role in magnetic memories, drive modules, diagnostic systems, also other advanced devices.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which enables their usage in miniature devices

Disadvantages

Disadvantages of NdFeB magnets:

They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
Due to limitations in realizing nuts and complex forms in magnets, we propose using a housing - magnetic holder.
Health risk resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. It is also worth noting that tiny parts of these products are able to be problematic in diagnostics medical when they are in the body.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Maximum magnetic pulling force – what contributes to it?

Information about lifting capacity was determined for ideal contact conditions, taking into account:

with the use of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
with a thickness minimum 10 mm
characterized by even structure
without any clearance between the magnet and steel
under axial force direction (90-degree angle)
at conditions approx. 20°C

Determinants of practical lifting force of a magnet

In real-world applications, the actual lifting capacity results from a number of factors, ranked from the most important:

Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
Element thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
Steel type – low-carbon steel gives the best results. Alloy steels lower magnetic permeability and lifting capacity.
Smoothness – ideal contact is obtained only on polished steel. Rough texture create air cushions, weakening the magnet.
Temperature – temperature increase results in weakening of force. Check the maximum operating temperature for a given model.

Lifting capacity was measured with the use of a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the holding force is lower. Additionally, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

Safe handling of neodymium magnets

Avoid contact if allergic

Certain individuals suffer from a sensitization to Ni, which is the standard coating for NdFeB magnets. Extended handling might lead to an allergic reaction. We strongly advise use safety gloves.

Thermal limits

Monitor thermal conditions. Exposing the magnet to high heat will permanently weaken its magnetic structure and strength.

Crushing force

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

This is not a toy

These products are not toys. Accidental ingestion of multiple magnets can lead to them attracting across intestines, which poses a critical condition and requires urgent medical intervention.

Warning for heart patients

Patients with a pacemaker must keep an large gap from magnets. The magnetic field can interfere with the functioning of the life-saving device.

Threat to navigation

An intense magnetic field interferes with the operation of compasses in phones and GPS navigation. Maintain magnets close to a device to avoid damaging the sensors.

Combustion hazard

Powder created during cutting of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Material brittleness

Despite the nickel coating, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Keep away from computers

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

Caution required

Exercise caution. Rare earth magnets act from a distance and snap with huge force, often quicker than you can move away.

Attention! Want to know more? Check our post: Why are neodymium magnets dangerous?

UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder

Technical details - UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Elemental analysis

Environmental data

Magnet pull force

Field Strength

Other deals

NC NeoCube fi 5 mm kuleczki kolorowe / N38 - neocube

HH 32x7.8 [M5] / N38 - through hole magnetic holder

MPL 40x10x5x2[7/3.5] / N38 - lamellar magnet

MW 15x10 / N38 - cylindrical magnet

Pros as well as cons of Nd2Fe14B magnets.

Strengths

Disadvantages

Holding force characteristics

Maximum magnetic pulling force – what contributes to it?

Determinants of practical lifting force of a magnet

Safe handling of neodymium magnets

Avoid contact if allergic

Thermal limits

Crushing force

This is not a toy

Warning for heart patients

Threat to navigation

Combustion hazard

Material brittleness

Keep away from computers

Caution required

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Pros as well as cons of Nd₂Fe₁₄B magnets.