Product available Ships today (order by 14:00)

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: PLN 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%]

check properties »

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

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Call us +48 22 499 98 98 alternatively get in touch using form the contact page.
Specifications and shape of neodymium magnets can be calculated on our our magnetic 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!

Physical properties - 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 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%

Environmental data

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: 210337-2026

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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. Model UMP 97x40 [M8+M10] GW F300 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).

The double-sided model attracts from above and below, increasing the chance of hooking a find. Top mounting works well when fishing from a bridge, pier, or well (vertical technique). The double-sided version increases search efficiency by 100%.

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

Most of our starter kits are complete and ready to use. 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.

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.

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.

By choosing the Dhit brand, you get a product of a significantly higher standard and real N52 grade for the same market price.

Dhit GOLD mounts utilize a robust construction that acts as a real armor for the brittle neodymium.

Many distributors use a trick by promoting the pull force measured only on the top hook. Interestingly, in the web, it is hard to find recordings demonstrating the actual strength of other brands on the lateral attachment.

{By choosing Dhit, you support a local market leader that perfectly understands the conditions of local rivers and lakes. Don't risk it with random brands, it is better to choose proven gear that cares about the happiness of every user.

Pros as well as cons of rare earth magnets.

Advantages

Besides their remarkable pulling force, neodymium magnets offer the following advantages:

They retain full power for nearly 10 years – the loss is just ~1% (in theory),
Neodymium magnets prove to be highly resistant to demagnetization caused by external interference,
In other words, due to the shiny finish of gold, the element gains visual value,
Neodymium magnets generate maximum magnetic induction on a contact point, which increases force concentration,
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...
In view of the possibility of free forming and customization to individualized requirements, NdFeB magnets can be produced in a variety of shapes and sizes, which amplifies use scope,
Key role in advanced technology sectors – they are utilized in mass storage devices, electric motors, diagnostic systems, also modern systems.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which makes them useful in miniature devices

Disadvantages

Disadvantages of neodymium magnets:

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
When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
We recommend a housing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated shapes.
Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the context of child safety. Additionally, small elements of these devices are able to be problematic in diagnostics medical when they are in the body.
Due to complex production process, their price is higher than average,

Lifting parameters

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

Magnet power was determined for optimal configuration, taking into account:

with the application of a yoke made of special test steel, guaranteeing full magnetic saturation
with a thickness no less than 10 mm
with an polished contact surface
without any air gap between the magnet and steel
under perpendicular application of breakaway force (90-degree angle)
at room temperature

Impact of factors on magnetic holding capacity in practice

In practice, the real power depends on several key aspects, listed from the most important:

Air gap (between the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to paint, rust or dirt).
Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
Steel thickness – insufficiently thick plate causes magnetic saturation, causing part of the power to be lost to the other side.
Plate material – mild steel attracts best. Higher carbon content reduce magnetic permeability and lifting capacity.
Surface structure – the more even the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
Thermal conditions – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity was determined with the use of a smooth steel plate of optimal thickness (min. 20 mm), under vertically applied force, however under shearing force the load capacity is reduced by as much as 5 times. In addition, even a small distance between the magnet and the plate lowers the lifting capacity.

Warnings

Swallowing risk

Only for adults. Tiny parts pose a choking risk, causing serious injuries. Keep out of reach of kids and pets.

Life threat

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

Flammability

Dust created during machining of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Respect the power

Use magnets consciously. Their immense force can surprise even professionals. Be vigilant and respect their force.

Physical harm

Danger of trauma: The attraction force is so great that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.

Keep away from electronics

Note: neodymium magnets generate a field that disrupts sensitive sensors. Keep a separation from your mobile, device, and GPS.

Do not overheat magnets

Avoid heat. Neodymium magnets are susceptible to temperature. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Avoid contact if allergic

Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If skin irritation appears, immediately stop handling magnets and wear gloves.

Protective goggles

Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Data carriers

Equipment safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, medical aids, mechanical watches).

Important! Want to know more? Read our article: Why are neodymium magnets dangerous?

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

Physical properties - 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

Elemental analysis

Environmental data

Pulling force

Magnetic Induction

See more offers

UMGW 20x15x7 [M4] GW / N38 - magnetic holder internal thread

MW 5x25 / N38 - cylindrical magnet

FM Ruszt magnetyczny do leja fi 200 jednopoziomowy / N52 - magnetic filter

SM 32x200 [2xM8] / N42 - magnetic separator

Pros as well as cons of rare earth magnets.

Advantages

Disadvantages

Lifting parameters

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

Impact of factors on magnetic holding capacity in practice

Warnings

Swallowing risk

Life threat

Flammability

Respect the power

Physical harm

Keep away from electronics

Do not overheat magnets

Avoid contact if allergic

Protective goggles

Data carriers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C