Product available Ships today (order by 14:00)

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%]

product specifications »

450.00 ZŁ with VAT / pcs + price for transport

365.85 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Want to talk magnets?

Call us now +48 22 499 98 98 if you prefer contact us via our online form the contact form page.
Weight and appearance of a neodymium magnet can be estimated using our force 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!

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 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: 210384-2026

Magnet Unit Converter

Magnet pull force

Pounds (lbs)

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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 F400 Lina / 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 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%.

The magnet is glued into a solid steel cup and sealed with epoxy resin, protecting it from water. Avoid throwing the magnet against bridge pillars or hard obstacles. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.

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. 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. Dirt, rust, paint, and algae create a distance that weakens the magnet by even 70-80%. A large power reserve is essential in real search conditions.

Searches are allowed as long as you do not interfere with archaeological sites or search for weapons. Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.

Unlike many market offers, Dhit does not cut corners on components, which translates into a clear advantage during every trip to the water.

As a result, despite the affordable cost, the lifespan of the Dhit product puts it a step above the competition.

It is worth remembering that the same mount pulled by the side hook often has only 40 kg of strength instead of the promised 200 kg. The Dhit brand focuses on full transparency by providing the real parameters of the gear, so you avoid disappointment during real field work.

{Unlike anonymous sellers, Dhit provides full support and instant service assistance, which is crucial after the transaction. Instead of risking with random brands, stick with the market leader that ensures the satisfaction of every user.

Advantages as well as disadvantages of neodymium magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:

They retain magnetic properties for around 10 years – the loss is just ~1% (in theory),
They feature excellent resistance to magnetism drop when exposed to external magnetic sources,
In other words, due to the glossy surface of nickel, the element gains a professional look,
The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
Possibility of accurate machining and optimizing to defined requirements,
Wide application in modern technologies – they are utilized in computer drives, brushless drives, advanced medical instruments, as well as modern systems.
Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Disadvantages

Cons of neodymium magnets and proposals for their use:

To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and 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 recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
Due to limitations in realizing nuts and complicated forms in magnets, we propose using casing - magnetic mount.
Possible danger to health – tiny shards of magnets can be dangerous, if swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these magnets are able to complicate diagnosis medical in case of swallowing.
Due to expensive raw materials, their price exceeds standard values,

Holding force characteristics

Detachment force of the magnet in optimal conditions – what affects it?

The force parameter is a theoretical maximum value executed under standard conditions:

using a plate made of mild steel, acting as a circuit closing element
whose thickness reaches at least 10 mm
characterized by lack of roughness
with direct contact (without coatings)
for force applied at a right angle (pull-off, not shear)
at conditions approx. 20°C

Magnet lifting force in use – key factors

In real-world applications, the actual holding force depends on many variables, listed from most significant:

Distance – existence of foreign body (paint, tape, air) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
Direction of force – maximum parameter is obtained only during perpendicular pulling. The force required to slide of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
Metal type – not every steel reacts the same. Alloy additives worsen the attraction effect.
Smoothness – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity was assessed using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate lowers the load capacity.

Warnings

Electronic hazard

Avoid bringing magnets near a purse, laptop, or screen. The magnetic field can destroy these devices and wipe information from cards.

Allergic reactions

A percentage of the population suffer from a sensitization to Ni, which is the standard coating for neodymium magnets. Frequent touching can result in an allergic reaction. We recommend use protective gloves.

Handling rules

Use magnets with awareness. Their powerful strength can shock even experienced users. Stay alert and do not underestimate their power.

Do not give to children

Adult use only. Small elements pose a choking risk, causing serious injuries. Store away from children and animals.

Physical harm

Risk of injury: The pulling power is so great that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Fire risk

Combustion risk: Rare earth powder is highly flammable. Do not process magnets without safety gear as this risks ignition.

Magnets are brittle

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

Keep away from electronics

Note: rare earth magnets produce a field that disrupts sensitive sensors. Keep a separation from your mobile, device, and navigation systems.

Do not overheat magnets

Regular neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. The loss of strength is permanent.

Medical interference

Individuals with a heart stimulator should keep an large gap from magnets. The magnetic field can interfere with the operation of the life-saving device.

Important! More info about risks in the article: Magnet Safety Guide.

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

Elemental analysis

Environmental data

Magnet pull force

Field Strength

Other offers

AM ucho [M10] - magnetic accessories

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

UMT 12x20 green / N38 - board holder

UMC 42x7/4x9 / N38 - cylindrical magnetic holder

Advantages as well as disadvantages of neodymium magnets.

Strengths

Disadvantages

Holding force characteristics

Detachment force of the magnet in optimal conditions – what affects it?

Magnet lifting force in use – key factors

Warnings

Electronic hazard

Allergic reactions

Handling rules

Do not give to children

Physical harm

Fire risk

Magnets are brittle

Keep away from electronics

Do not overheat magnets

Medical interference

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C