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 parameters »

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

Do you have problems deciding?

Pick up the phone and ask +48 888 99 98 98 otherwise let us know using our online form the contact form page.
Weight along with form of neodymium magnets can be tested on our modular calculator.

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 specification - 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%

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

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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. 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.

Our holders have a thick steel housing covered with an anti-corrosion layer (chrome, nickel, zinc). 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.

Check the product title and description to see if you are buying just the magnet or the XL set. We often add thread glue to secure the eyelet against unscrewing in water. 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. The magnet may slide on round elements (bicycle frame) due to the small contact area. 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. Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.

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

Consequently, despite the market price, the mechanical durability of the Dhit product puts it a step above other brands.

It is worth remembering that the identical mount used by the lateral point often has only 40 kg of strength instead of the declared 200 kg. Interestingly, in the web, there are virtually no videos demonstrating the actual strength of other brands on the lateral attachment.

{In contrast to anonymous sellers, Dhit provides expert advice and real warranty help, which is crucial after the transaction. Every product is individually inspected before delivery, which guarantees that you the set will be of the defect-free.

Advantages and disadvantages of neodymium magnets.

Strengths

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

Their strength is durable, and after approximately 10 years it decreases only by ~1% (theoretically),
Magnets effectively resist against demagnetization caused by foreign field sources,
The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to present itself better,
The surface of neodymium magnets generates a concentrated magnetic field – this is one of their assets,
Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
Thanks to freedom in forming and the capacity to customize to unusual requirements,
Wide application in modern industrial fields – they are commonly used in HDD drives, electric motors, precision medical tools, and technologically advanced constructions.
Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in miniature devices

Cons

Cons of neodymium magnets and ways of using them

At strong impacts they can crack, 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 force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
Due to limitations in realizing threads and complex forms in magnets, we propose using a housing - magnetic holder.
Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these products are able to complicate diagnosis medical after entering the body.
With large orders the cost of neodymium magnets is a challenge,

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what affects it?

The load parameter shown represents the peak performance, recorded under laboratory conditions, namely:

on a base made of structural steel, perfectly concentrating the magnetic field
possessing a massiveness of minimum 10 mm to ensure full flux closure
with a surface cleaned and smooth
without the slightest insulating layer between the magnet and steel
during pulling in a direction perpendicular to the plane
at conditions approx. 20°C

Lifting capacity in real conditions – factors

In real-world applications, the actual holding force depends on a number of factors, ranked from most significant:

Distance – the presence of any layer (paint, tape, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
Load vector – highest force is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be lost to the other side.
Material composition – different alloys reacts the same. High carbon content weaken the interaction with the magnet.
Smoothness – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, reducing force.
Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures they can be stronger (up to a certain limit).

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet and the plate reduces the lifting capacity.

H&S for magnets

This is not a toy

Strictly store magnets out of reach of children. Risk of swallowing is high, and the effects of magnets clamping inside the body are tragic.

Avoid contact if allergic

Some people suffer from a hypersensitivity to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching might lead to skin redness. We strongly advise wear protective gloves.

Dust is flammable

Dust created during grinding of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Handling rules

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

Do not overheat magnets

Keep cool. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).

Keep away from computers

Powerful magnetic fields can destroy records on payment cards, hard drives, and storage devices. Maintain a gap of min. 10 cm.

ICD Warning

Patients with a heart stimulator have to maintain an safe separation from magnets. The magnetism can interfere with the operation of the life-saving device.

Protective goggles

Neodymium magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets leads to them shattering into small pieces.

Impact on smartphones

A powerful magnetic field negatively affects the functioning of compasses in smartphones and navigation systems. Keep magnets close to a smartphone to avoid damaging the sensors.

Crushing risk

Mind your fingers. Two large magnets will snap together instantly with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Security! More info about hazards in the article: Magnet Safety Guide.

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

Technical specification - 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

Sustainability

Force (pull)

Magnetic Field

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MW 8x5 / N38 - cylindrical magnet

BM 950x180x70 [4x M8] - magnetic beam

SM 18x100 [2xM5] / N42 - magnetic separator

Advantages and disadvantages of neodymium magnets.

Strengths

Cons

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what affects it?

Lifting capacity in real conditions – factors

H&S for magnets

This is not a toy

Avoid contact if allergic

Dust is flammable

Handling rules

Do not overheat magnets

Keep away from computers

ICD Warning

Protective goggles

Impact on smartphones

Crushing risk

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C