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%]

check properties »

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

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Give us a call +48 22 499 98 98 alternatively drop us a message by means of request form the contact section.
Lifting power and form of magnets can be calculated on 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!

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

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%

Ecology and recycling (GPSR)

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

Quick Unit Converter

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UMH 32x8x46 [M6] / N38 - magnetic holder with hook

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MPL 17x17x3 / N38 - lamellar magnet

4.71 ZŁ brutto / pcs

For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. This specific magnet ensures a laboratory lifting capacity of up to 480.00 kg, which translates into high effectiveness in water. 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. The double-sided version increases search efficiency by 100%.

This construction protects the brittle neodymium from direct impact against stones and the bottom. Despite solid construction, neodymium is a brittle material and can chip upon very strong impact (e.g., against concrete). 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). We often add thread glue to secure the eyelet against unscrewing in water. We recommend always securing the thread with glue or tightening the eyelet firmly before first use.

The capacity given in the name (e.g., 480.00 kg) is the maximum value measured in laboratory conditions. 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.

Searches are allowed as long as you do not interfere with archaeological sites or search for weapons. We recommend familiarizing yourself with current local regulations and heritage protection laws.

Unlike other brands, Dhit uses the highest quality components, which translates into a better results during treasure hunting.

Most competitor mounts have weak shells that deform during the any strong impact against underwater obstacles.

Many distributors use a trick by advertising the power measured exclusively on the vertical mount. The Dhit brand focuses on honest data by stating the actual capabilities of the gear, so you avoid disappointment during treasure hunting.

{Unlike anonymous sellers, Dhit provides full support and real service assistance, which is crucial after the purchase. Instead of risking with random brands, it is better to choose proven gear that ensures the happiness of every user.

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:

They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
Neodymium magnets remain exceptionally resistant to magnetic field loss caused by external interference,
A magnet with a smooth gold surface has better aesthetics,
The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
Due to the possibility of flexible forming and adaptation to specialized needs, NdFeB magnets can be manufactured in a broad palette of forms and dimensions, which expands the range of possible applications,
Huge importance in modern industrial fields – they are utilized in computer drives, motor assemblies, medical equipment, and industrial machines.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in compact constructions

Cons

What to avoid - cons of neodymium magnets and proposals for their use:

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 improves its resistance to damage
Neodymium magnets lose their strength 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
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.
Limited ability of making nuts in the magnet and complex forms - recommended is a housing - mounting mechanism.
Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these magnets can disrupt the diagnostic process medical in case of swallowing.
With budget limitations the cost of neodymium magnets is economically unviable,

Lifting parameters

Highest magnetic holding force – what it depends on?

Magnet power was defined for optimal configuration, assuming:

on a plate made of mild steel, optimally conducting the magnetic field
whose transverse dimension is min. 10 mm
characterized by smoothness
without any clearance between the magnet and steel
for force acting at a right angle (pull-off, not shear)
at room temperature

Practical aspects of lifting capacity – factors

In practice, the actual lifting capacity depends on a number of factors, ranked from most significant:

Distance (between the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
Angle of force application – highest force is reached only during perpendicular pulling. The resistance to sliding of the magnet along the plate is usually several times lower (approx. 1/5 of the lifting capacity).
Base massiveness – insufficiently thick plate does not accept the full field, causing part of the flux to be lost into the air.
Metal type – not every steel reacts the same. Alloy additives worsen the interaction with the magnet.
Surface condition – smooth surfaces guarantee perfect abutment, which increases force. Uneven metal reduce efficiency.
Temperature influence – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.

H&S for magnets

Pacemakers

For implant holders: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or request help to work with the magnets.

Beware of splinters

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. Eye protection is mandatory.

Conscious usage

Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Think ahead.

Swallowing risk

Only for adults. Small elements can be swallowed, causing serious injuries. Keep away from kids and pets.

Allergic reactions

Allergy Notice: The nickel-copper-nickel coating contains nickel. If redness occurs, immediately stop working with magnets and use protective gear.

Threat to navigation

Remember: neodymium magnets generate a field that confuses precision electronics. Maintain a safe distance from your phone, device, and navigation systems.

Electronic hazard

Intense magnetic fields can erase data on payment cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Fire risk

Machining of neodymium magnets poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Do not overheat magnets

Avoid heat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, inquire about HT versions (H, SH, UH).

Finger safety

Risk of injury: The pulling power is so great that it can result in blood blisters, crushing, and broken bones. Use thick gloves.

Safety First! Looking for details? Check our post: Are neodymium magnets dangerous?

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

Material specification

Ecology and recycling (GPSR)

Force (pull)

Field Strength

See more products

MW 38x3.5 / N38 - cylindrical magnet

MPL 20x5x5 / N38 - lamellar magnet

UMH 32x8x46 [M6] / N38 - magnetic holder with hook

MPL 17x17x3 / N38 - lamellar magnet

Strengths as well as weaknesses of Nd2Fe14B magnets.

Strengths

Cons

Lifting parameters

Highest magnetic holding force – what it depends on?

Practical aspects of lifting capacity – factors

H&S for magnets

Pacemakers

Beware of splinters

Conscious usage

Swallowing risk

Allergic reactions

Threat to navigation

Electronic hazard

Fire risk

Do not overheat magnets

Finger safety

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.