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

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Need help making a decision?

Give us a call +48 888 99 98 98 otherwise send us a note using request form the contact page.
Lifting power and structure of magnets can be tested with our online calculation tool.

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

💡 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 parameters of the product - 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

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%

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: 210384-2026

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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. It is equipment that can handle pulling heavy and silted objects from the river bottom. The choice depends on whether you plan to throw from the shore (double-sided) or from a bridge (single-sided).

Double-sided holders (Two-Side) have two active magnetic surfaces and two mounting holes. 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.

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. After each fishing trip, we recommend rinsing the magnet with fresh water and drying it.

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.

This force applies to perfect adherence with the entire surface to a smooth, clean steel plate with a min. thickness of 20mm. The magnet may slide on round elements (bicycle frame) due to the small contact area. 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.

By selecting Dhit GOLD mounts, you receive a higher quality standard and real N52 grade for the average cost.

As a result, despite the affordable cost, the mechanical durability of the GOLD mount positions it far ahead of the competition.

You should know that the identical mount pulled by the side hook often has only a fraction of strength instead of the declared 200 kg. The Dhit brand guarantees honest data by providing the actual capabilities of the magnet, so you avoid disappointment during treasure hunting.

{In contrast to competitors importing from China, Dhit provides full support and real service assistance, which is crucial after the purchase. Every mount is individually inspected before shipping, which guarantees that you the set will be of the defect-free.

Pros and cons of rare earth magnets.

Strengths

Besides their remarkable strength, neodymium magnets offer the following advantages:

They have stable power, and over nearly 10 years their attraction force decreases symbolically – ~1% (according to theory),
They retain their magnetic properties even under external field action,
In other words, due to the glossy surface of silver, the element becomes visually attractive,
Magnets have huge magnetic induction on the surface,
Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures approaching 230°C and above...
Possibility of custom shaping as well as optimizing to complex needs,
Huge importance in high-tech industry – they find application in computer drives, drive modules, diagnostic systems, also modern systems.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:

At very strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
We recommend casing - magnetic holder, due to difficulties in creating threads inside the magnet and complicated shapes.
Health risk resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. Additionally, small elements of these devices can complicate diagnosis medical in case of swallowing.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Holding force of 480.00 kg is a result of laboratory testing executed under the following configuration:

using a plate made of mild steel, functioning as a ideal flux conductor
whose thickness reaches at least 10 mm
characterized by smoothness
without any insulating layer between the magnet and steel
for force acting at a right angle (pull-off, not shear)
in temp. approx. 20°C

Impact of factors on magnetic holding capacity in practice

Effective lifting capacity is influenced by specific conditions, including (from most important):

Gap (betwixt the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to paint, rust or debris).
Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the maximum value.
Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
Steel grade – the best choice is high-permeability steel. Stainless steels may have worse magnetic properties.
Plate texture – ground elements guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
Temperature influence – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate lowers the load capacity.

Warnings

Respect the power

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.

GPS and phone interference

Be aware: neodymium magnets generate a field that confuses sensitive sensors. Maintain a safe distance from your mobile, tablet, and GPS.

Threat to electronics

Avoid bringing magnets near a wallet, computer, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Hand protection

Large magnets can smash fingers in a fraction of a second. Never place your hand between two attracting surfaces.

Machining danger

Drilling and cutting of NdFeB material poses a fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

This is not a toy

Always keep magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are tragic.

Danger to pacemakers

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

Power loss in heat

Regular neodymium magnets (N-type) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Metal Allergy

A percentage of the population experience a sensitization to Ni, which is the common plating for NdFeB magnets. Extended handling may cause a rash. It is best to wear protective gloves.

Magnets are brittle

Beware of splinters. Magnets can fracture upon uncontrolled impact, launching shards into the air. We recommend safety glasses.

Safety First! Details about hazards in the article: Safety of working with magnets.

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

Technical parameters of the product - 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

Material specification

Sustainability

Pulling force

Magnetic Field

Other proposals

SMZR 25x200 / N52 - magnetic separator with handle

MP 25x8x20 / N38 - ring magnet

MW 100x30 / N38 - cylindrical magnet

SM 18x125 [2xM5] / N42 - magnetic separator

Pros and cons of rare earth magnets.

Strengths

Disadvantages

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what contributes to it?

Impact of factors on magnetic holding capacity in practice

Warnings

Respect the power

GPS and phone interference

Threat to electronics

Hand protection

Machining danger

This is not a toy

Danger to pacemakers

Power loss in heat

Metal Allergy

Magnets are brittle

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C