Product available Ships tomorrow

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: 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%]

400.00 ZŁ with VAT / pcs + price for transport

325.20 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

325.20 ZŁ

400.00 ZŁ

price from 5 pcs

305.69 ZŁ

376.00 ZŁ

price from 10 pcs

286.18 ZŁ

352.00 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure what to buy?

Call us +48 888 99 98 98 alternatively let us know by means of inquiry form the contact section.
Lifting power as well as structure of a neodymium magnet can be checked on our modular calculator.

Order by 14:00 and we’ll ship today!

💡 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!

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: 210338-2025

Magnet Unit Converter

Magnet Pull Force

Force in kg

Force (N)

Force in lbs

Magnetic Field

Induction (Gs)

Induction (T)

Just complete one field, to let the tool compute the rest for you.

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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. It is equipment that can handle pulling heavy and silted objects from the river bottom. For beginners, we recommend lighter single-sided models (F80-F200), for advanced users - heavier double-sided (Two-Side) ones.

The 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. 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. Avoid throwing the magnet against bridge pillars or hard obstacles. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.

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.

The capacity given in the name (e.g., 480.00 kg) is the maximum value measured in laboratory conditions. Dirt, rust, paint, and algae create a distance that weakens the magnet by even 70-80%. 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. It is worth acting responsibly, cleaning up after yourself, and caring for the environment by removing fished-out scrap.

Unlike other brands, Dhit does not cut corners on components, which translates into a better results during treasure hunting.

Dhit GOLD mounts feature heavy-duty, thick-walled steel that acts as a real armor for the brittle neodymium.

You should know that the identical magnet used by the side hook often has only a fraction of power instead of the promised 200 kg. GOLD mounts guarantees full transparency by providing the actual capabilities of the gear, so you avoid disappointment during treasure hunting.

{By choosing GOLD mounts, you support a local market leader that perfectly understands the conditions of local rivers and lakes. Don't risk it with unknown goods, stick with the market leader that ensures the happiness of searcher.

Strengths as well as weaknesses of rare earth magnets.

Strengths

Apart from their strong power, neodymium magnets have these key benefits:

They do not lose magnetism, even during approximately 10 years – the decrease in strength is only ~1% (theoretically),
They do not lose their magnetic properties even under close interference source,
By applying a reflective coating of gold, the element has an proper look,
They are known for high magnetic induction at the operating surface, which improves attraction properties,
Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
Possibility of detailed modeling and optimizing to specific applications,
Universal use in modern industrial fields – they serve a role in computer drives, drive modules, diagnostic systems, as well as industrial machines.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in small systems

Weaknesses

Cons of neodymium magnets: tips and applications.

They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
We suggest a housing - magnetic holder, due to difficulties in realizing threads inside the magnet and complicated forms.
Potential hazard resulting from small fragments of magnets are risky, if swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small components of these products 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

Holding force characteristics

Maximum lifting capacity of the magnet – what affects it?

Holding force of 480.00 kg is a result of laboratory testing performed under specific, ideal conditions:

using a plate made of mild steel, serving as a ideal flux conductor
with a thickness of at least 10 mm
with an polished contact surface
with zero gap (no paint)
for force acting at a right angle (pull-off, not shear)
at ambient temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

Effective lifting capacity is influenced by working environment parameters, including (from priority):

Clearance – the presence of foreign body (paint, tape, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
Angle of force application – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
Material composition – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, reducing force.
Thermal factor – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate decreases the load capacity.

Safe handling of NdFeB magnets

Permanent damage

Do not overheat. NdFeB magnets are susceptible to temperature. If you require operation above 80°C, look for HT versions (H, SH, UH).

Sensitization to coating

Medical facts indicate that nickel (standard magnet coating) is a strong allergen. If you have an allergy, prevent direct skin contact or select coated magnets.

Medical implants

Medical warning: Neodymium magnets can deactivate heart devices and defibrillators. Do not approach if you have medical devices.

Machining danger

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

Safe distance

Data protection: Strong magnets can ruin data carriers and delicate electronics (heart implants, medical aids, mechanical watches).

Safe operation

Before use, check safety instructions. Uncontrolled attraction can break the magnet or hurt your hand. Be predictive.

Physical harm

Mind your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing anything in their path. Be careful!

Compass and GPS

Be aware: rare earth magnets generate a field that confuses sensitive sensors. Keep a separation from your mobile, device, and navigation systems.

Swallowing risk

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

Material brittleness

Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Security! Need more info? Read our article: Why are neodymium magnets dangerous?

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

Not sure what to buy?

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)

Magnet Pull Force

Magnetic Field

Other offers

SM 25x375 [2xM8] / N42 - magnetic separator

UMGGW 88x8.5 [M6] GW / N38 - magnetic holder rubber internal thread

SMZR 32x175 / N52 - magnetic separator with handle

SM 25x300 [2xM8] / N52 - magnetic separator

Strengths as well as weaknesses of rare earth magnets.

Strengths

Weaknesses

Holding force characteristics

Maximum lifting capacity of the magnet – what affects it?

Practical lifting capacity: influencing factors

Permanent damage

Sensitization to coating

Medical implants

Machining danger

Safe distance

Safe operation

Physical harm

Compass and GPS

Swallowing risk

Material brittleness

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C