Product available Ships today (order by 14:00)

UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - 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 210433

GTIN/EAN: 5906301814085

5.00

Diameter Ø

75 mm [±1 mm]

Height

25 mm [±1 mm]

Weight

900 g

Load capacity

310.00 kg / 3040.06 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 8 000 Gauss [±5%]

check specifications »

200.00 ZŁ with VAT / pcs + price for transport

162.60 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs

162.60 ZŁ

200.00 ZŁ

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152.84 ZŁ

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Need help making a decision?

Call us +48 22 499 98 98 if you prefer contact us via form the contact page.
Force as well as shape of magnetic components can be verified with our force calculator.

Orders submitted before 14:00 will be dispatched today!

💡 Guide: How to choose a decent magnet and not get ripped off?

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!

Product card - UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

Specification / characteristics - UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

properties

properties	values
Cat. no.	210433
GTIN/EAN	5906301814085
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	75 mm [±1 mm]
Height	25 mm [±1 mm]
Weight	900 g
Load capacity ~ ?	310.00 kg / 3040.06 N
Coating	[NiCuNi] Nickel
Series	GOLD
Holder Type	2 sided
Material Type	Structural steel S235 (ferrous)
Magnetic Flux	~ 8 000 Gauss [±5%]
Rope Length	25 m
Rope Capacity	~ 1595 kg
Rope Diameter	Ø 8 mm
Gloves	1 pair
Size/Mount Quantity	3xM10
Manufacturing Tolerance	±1 mm

Magnetic properties of material N42

Specification / characteristics UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

properties	values	units
remenance Br [min. - max.] ?	12.9-13.2	kGs
remenance Br [min. - max.] ?	1290-1320	mT
coercivity bHc ?	10.8-12.0	kOe
coercivity bHc ?	860-955	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	40-42	BH max MGOe
energy density [min. - max.] ?	318-334	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

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: 210433-2026

Measurement Calculator

Force (pull)

Newtons (N)

Force in lbs

Field Strength

Induction (Gs)

Input a figure in a single field to see the conversion for the other fields right away.

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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. Model UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 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. 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). 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. 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.

The capacity given in the name (e.g., 310.00 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%. A large power reserve is essential in real search conditions.

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.

By selecting the Dhit brand, you receive a product of a significantly higher standard and true magnetic power for the average cost.

Consequently, despite the market price, the lifespan of the Dhit product puts it far ahead of the competition.

Many distributors employ a tactic by promoting the power tested exclusively on the vertical mount. The Dhit brand focuses on full transparency by stating the real parameters of the gear, so you can be sure during treasure hunting.

{By choosing Dhit, you support Polish engineering that knows the specifics of our waters. Don't risk it with random brands, it is better to choose proven gear that cares about the satisfaction of searcher.

Strengths as well as weaknesses of rare earth magnets.

Advantages

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

They do not lose magnetism, even during approximately 10 years – the reduction in strength is only ~1% (according to tests),
Neodymium magnets are highly resistant to loss of magnetic properties caused by external interference,
In other words, due to the shiny layer of silver, the element is aesthetically pleasing,
Neodymium magnets ensure maximum magnetic induction on a small surface, which increases force concentration,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
Possibility of custom machining and modifying to atypical requirements,
Key role in high-tech industry – they find application in hard drives, motor assemblies, advanced medical instruments, also modern systems.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which enables their usage in compact constructions

Cons

Disadvantages of NdFeB magnets:

To avoid cracks under impact, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 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 as well as corrosion.
We recommend casing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complicated shapes.
Possible danger to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. It is also worth noting that small components of these devices can be problematic in diagnostics medical in case of swallowing.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Highest magnetic holding force – what it depends on?

The load parameter shown represents the maximum value, recorded under optimal environment, meaning:

with the use of a sheet made of special test steel, guaranteeing full magnetic saturation
with a cross-section of at least 10 mm
characterized by even structure
under conditions of no distance (surface-to-surface)
under axial force direction (90-degree angle)
in neutral thermal conditions

Lifting capacity in real conditions – factors

Bear in mind that the application force may be lower influenced by elements below, in order of importance:

Gap between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
Steel thickness – too thin steel does not accept the full field, causing part of the flux to be escaped to the other side.
Metal type – not every steel reacts the same. High carbon content worsen the attraction effect.
Base smoothness – the more even the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the lifting capacity is smaller. Moreover, even a small distance between the magnet and the plate decreases the load capacity.

Warnings

Allergy Warning

Some people experience a sensitization to nickel, which is the standard coating for NdFeB magnets. Prolonged contact may cause skin redness. We recommend use safety gloves.

Crushing risk

Risk of injury: The pulling power is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Health Danger

For implant holders: Strong magnetic fields affect medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.

Powerful field

Handle magnets with awareness. Their immense force can surprise even professionals. Stay alert and do not underestimate their force.

Risk of cracking

Despite the nickel coating, the material is brittle and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Flammability

Combustion risk: Rare earth powder is explosive. Do not process magnets in home conditions as this risks ignition.

Heat warning

Control the heat. Heating the magnet to high heat will destroy its properties and pulling force.

Electronic hazard

Avoid bringing magnets near a wallet, laptop, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Threat to navigation

A strong magnetic field negatively affects the operation of compasses in phones and GPS navigation. Do not bring magnets near a smartphone to avoid breaking the sensors.

Danger to the youngest

Absolutely keep magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are life-threatening.

Caution! Details about hazards in the article: Safety of working with magnets.

UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

Product card - UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

Magnetic properties of material N42

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Elemental analysis

Environmental data

Force (pull)

Field Strength

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UMP 94x28 [3xM10] GW F300 GOLD / N38 - search holder

Strengths as well as weaknesses of rare earth magnets.

Advantages

Cons

Pull force analysis

Highest magnetic holding force – what it depends on?

Lifting capacity in real conditions – factors

Warnings

Allergy Warning

Crushing risk

Health Danger

Powerful field

Risk of cracking

Flammability

Heat warning

Electronic hazard

Threat to navigation

Danger to the youngest

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C