Product available Ships in 2 days

UMP 97x40 [M8+M10] GW F300 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 210337

GTIN/EAN: 5906301813965

5.00

Diameter Ø

97 mm [±1 mm]

Height

40 mm [±1 mm]

Weight

2200 g

Load capacity

380.00 kg / 3726.53 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 10 000 Gauss [±5%]

product specifications »

300.00 ZŁ with VAT / pcs + price for transport

243.90 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Want to talk magnets?

Give us a call +48 888 99 98 98 alternatively drop us a message by means of our online form the contact section.
Strength as well as form of neodymium magnets can be checked using our power calculator.

Order by 14:00 and we’ll ship today!

💡 Check why professionals choose Dhit over cheap substitutes

Don't be fooled by amateur online tests – go for certified quality and specific parameters that guarantee success:

📏 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 data - UMP 97x40 [M8+M10] GW F300 kg / N38 - search holder

Specification / characteristics - UMP 97x40 [M8+M10] GW F300 kg / N38 - search holder

properties

properties	values
Cat. no.	210337
GTIN/EAN	5906301813965
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	97 mm [±1 mm]
Height	40 mm [±1 mm]
Weight	2200 g
Load capacity ~ ?	380.00 kg / 3726.53 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 97x40 [M8+M10] GW F300 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 and environmental data

Chemical composition

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: 210337-2025

Measurement Calculator

Magnet pull force

Force (N)

Force in lbs

Magnetic Induction

Induction (T)

Type data into a field, and the rest change instantly.

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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 380.00 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. The side eyelet ensures the magnet doesn't stand sideways or "on edge" during pulling. Single-sided magnets are usually lighter and cheaper but less effective for long throws.

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). Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.

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. We recommend always securing the thread with glue or tightening the eyelet firmly before first use.

The capacity given in the name (e.g., 380.00 kg) is the maximum value measured in laboratory conditions. In a river, objects are often rusty, silted, or irregular in shape (e.g., pipes), which drastically reduces grip strength. 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. We recommend familiarizing yourself with current local regulations and heritage protection laws.

In contrast to many market offers, Dhit does not cut corners on materials, which translates into a better results during every trip to the water.

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

Many sellers employ a tactic by promoting the pull force measured exclusively on the vertical mount. Interestingly, in the entire internet, it is hard to find recordings testing the actual strength of competitor products on the lateral attachment.

{In contrast to competitors importing from China, Dhit provides full support and real warranty help, which is crucial after the purchase. Every product is checked before shipping, which ensures that you the set will be of the defect-free.

Advantages as well as disadvantages of neodymium magnets.

Benefits

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

They retain magnetic properties for around ten years – the drop is just ~1% (according to analyses),
They maintain their magnetic properties even under close interference source,
By covering with a reflective coating of nickel, the element gains an proper look,
The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Possibility of exact modeling as well as modifying to atypical requirements,
Versatile presence in electronics industry – they are used in data components, brushless drives, advanced medical instruments, also complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which makes them useful in compact constructions

Disadvantages

Disadvantages of NdFeB magnets:

They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we advise 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 stable to moisture, in case of application outdoors
We recommend casing - magnetic holder, due to difficulties in creating nuts inside the magnet and complicated forms.
Potential hazard related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these magnets are able to be problematic in diagnostics medical when they are in the body.
Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Best holding force of the magnet in ideal parameters – what it depends on?

The lifting capacity listed is a theoretical maximum value executed under standard conditions:

on a base made of mild steel, optimally conducting the magnetic flux
with a thickness no less than 10 mm
with a surface cleaned and smooth
without any clearance between the magnet and steel
under vertical force direction (90-degree angle)
in temp. approx. 20°C

Lifting capacity in practice – influencing factors

It is worth knowing that the working load may be lower subject to the following factors, starting with the most relevant:

Distance – the presence of any layer (rust, dirt, air) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
Angle of force application – highest force is reached only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
Material type – ideal substrate is high-permeability steel. Hardened steels may have worse magnetic properties.
Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Unevenness acts like micro-gaps.
Temperature – temperature increase causes a temporary drop of induction. Check the maximum operating temperature for a given model.

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under perpendicular forces, however under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Safe handling of NdFeB magnets

Handling guide

Before use, read the rules. Sudden snapping can destroy the magnet or injure your hand. Be predictive.

Maximum temperature

Standard neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. Damage is permanent.

Cards and drives

Do not bring magnets close to a wallet, laptop, or TV. The magnetic field can destroy these devices and erase data from cards.

Eye protection

Despite the nickel coating, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

Crushing risk

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

Adults only

Product intended for adults. Tiny parts can be swallowed, causing intestinal necrosis. Store away from kids and pets.

Fire risk

Combustion risk: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.

Precision electronics

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

Pacemakers

Life threat: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.

Skin irritation risks

Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, refrain from direct skin contact or choose coated magnets.

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

UMP 97x40 [M8+M10] GW F300 kg / N38 - search holder

Technical data - UMP 97x40 [M8+M10] GW F300 kg / N38 - search holder

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Sustainability

Magnet pull force

Magnetic Induction

Other products

MPL 20x8x4 / N38 - lamellar magnet

SM 32x500 [2xM8] / N52 - magnetic separator

ZM XMAG2 210 elementów - magnetic toy

HH 25x7.7 [M5] / N38 - through hole magnetic holder

Advantages as well as disadvantages of neodymium magnets.

Benefits

Disadvantages

Lifting parameters

Best holding force of the magnet in ideal parameters – what it depends on?

Lifting capacity in practice – influencing factors

Safe handling of NdFeB magnets

Handling guide

Maximum temperature

Cards and drives

Eye protection

Crushing risk

Adults only

Fire risk

Precision electronics

Pacemakers

Skin irritation risks

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C