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%]

see technical data »

400.00 ZŁ with VAT / pcs + price for transport

325.20 ZŁ net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Want to talk magnets?

Pick up the phone and ask +48 888 99 98 98 if you prefer contact us via form the contact page.
Lifting power as well as shape of magnets can be tested using our magnetic calculator.

Same-day shipping 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!

Technical data of the product - 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 and environmental data

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: 210338-2026

Measurement Calculator

Pulling force

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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. Model UMP 107x40 [M8+M10] GW F 400 kg / N38 offers an optimal weight-to-pull force ratio, which is important for repeated throwing. 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. 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. The housing significantly increases lifespan but does not make the magnet completely indestructible. 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. In the package, you will find everything needed: strong rope (e.g., 20m), gloves, and hardware. 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. 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.

In contrast to other brands, Dhit uses the highest quality components, which translates into a clear advantage during every trip to the water.

The GOLD series feature a robust construction that acts as a real armor for the brittle neodymium.

Many distributors use a trick by promoting the pull force measured only on the top hook. GOLD mounts guarantees full transparency by providing the real parameters of the magnet, so you can be sure during real field work.

{Unlike anonymous sellers, Dhit provides full support and real service assistance, which is crucial after the purchase. Instead of risking with unknown goods, it is better to choose proven gear that cares about the satisfaction of searcher.

Advantages and disadvantages of Nd₂Fe₁₄B magnets.

Advantages

Besides their durability, neodymium magnets are valued for these benefits:

They retain attractive force for nearly ten years – the loss is just ~1% (in theory),
Neodymium magnets remain remarkably resistant to loss of magnetic properties caused by external field sources,
By applying a shiny layer of gold, the element has an proper look,
Neodymium magnets create maximum magnetic induction on a contact point, which allows for strong attraction,
Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
In view of the potential of accurate molding and adaptation to specialized solutions, NdFeB magnets can be manufactured in a variety of geometric configurations, which amplifies use scope,
Versatile presence in modern industrial fields – they find application in hard 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

Weaknesses

Disadvantages of NdFeB magnets:

They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
We suggest casing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex forms.
Potential hazard resulting from small fragments of magnets are risky, if swallowed, which becomes key in the context of child health protection. It is also worth noting that small elements of these products are able to be problematic in diagnostics medical when they are in the body.
With budget limitations the cost of neodymium magnets can be a barrier,

Lifting parameters

Maximum lifting force for a neodymium magnet – what contributes to it?

The declared magnet strength represents the limit force, recorded under ideal test conditions, specifically:

on a base made of mild steel, effectively closing the magnetic flux
possessing a massiveness of at least 10 mm to ensure full flux closure
with an polished touching surface
under conditions of ideal adhesion (surface-to-surface)
for force acting at a right angle (pull-off, not shear)
at ambient temperature room level

Lifting capacity in practice – influencing factors

Holding efficiency is affected by working environment parameters, mainly (from most important):

Clearance – the presence of any layer (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
Steel type – low-carbon steel attracts best. Alloy steels lower magnetic permeability and lifting capacity.
Plate texture – ground elements guarantee perfect abutment, which increases force. Uneven metal reduce efficiency.
Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was determined using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate reduces the load capacity.

Safe handling of neodymium magnets

Nickel coating and allergies

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

Crushing risk

Big blocks can crush fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Danger to the youngest

These products are not toys. Swallowing a few magnets may result in them attracting across intestines, which constitutes a critical condition and necessitates immediate surgery.

Conscious usage

Exercise caution. Neodymium magnets attract from a long distance and snap with massive power, often quicker than you can react.

Combustion hazard

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

Warning for heart patients

Life threat: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.

Heat sensitivity

Avoid heat. Neodymium magnets are susceptible to heat. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Threat to navigation

A strong magnetic field interferes with the functioning of compasses in phones and navigation systems. Keep magnets near a device to avoid breaking the sensors.

Beware of splinters

Neodymium magnets are ceramic materials, meaning they are prone to chipping. Impact of two magnets leads to them breaking into shards.

Safe distance

Do not bring magnets close to a wallet, computer, or TV. The magnetism can destroy these devices and wipe information from cards.

Security! Looking for details? Check our post: Why are neodymium magnets dangerous?

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

Technical data of the product - 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

Material specification

Sustainability

Pulling force

Magnetic Induction

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UMC 32x11/3x8 / N38 - cylindrical magnetic holder

MW 12x10 / N38 - cylindrical magnet

MPL 15x2x30 / N38 - lamellar magnet

UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread

Advantages and disadvantages of Nd2Fe14B magnets.

Advantages

Weaknesses

Lifting parameters

Maximum lifting force for a neodymium magnet – what contributes to it?

Lifting capacity in practice – influencing factors

Safe handling of neodymium magnets

Nickel coating and allergies

Crushing risk

Danger to the youngest

Conscious usage

Combustion hazard

Warning for heart patients

Heat sensitivity

Threat to navigation

Beware of splinters

Safe distance

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Advantages and disadvantages of Nd₂Fe₁₄B magnets.