Product on order Ships in 3-5 days

UMP 79x50 [M8] GW - 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 210260

GTIN/EAN: 5906301813934

Diameter Ø

79 mm [±1 mm]

Height

50 mm [±1 mm]

Weight

1.95 g

Load capacity

340.00 kg / 3334.26 N

Coating

[NiCuNi] Nickel

product parameters »

270.00 ZŁ with VAT / pcs + price for transport

219.51 ZŁ net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure which magnet to buy?

Pick up the phone and ask +48 888 99 98 98 if you prefer contact us via contact form the contact page.
Lifting power as well as shape of magnetic components can be analyzed on our modular calculator.

Orders submitted before 14:00 will be dispatched 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!

Physical properties - UMP 79x50 [M8] GW - search holder

Specification / characteristics - UMP 79x50 [M8] GW - search holder

properties

properties	values
Cat. no.	210260
GTIN/EAN	5906301813934
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	79 mm [±1 mm]
Height	50 mm [±1 mm]
Weight	1.95 g
Load capacity ~ ?	340.00 kg / 3334.26 N
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±1 mm

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

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: 210260-2026

Magnet Unit Converter

Pulling force

Kilograms (kg)

Force (N)

Pounds (lbs)

Field Strength

Induction (Gs)

Input a number in one of the inputs, and the rest will recalculate automatically.

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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. This specific magnet ensures a laboratory lifting capacity of up to 340.00 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).

The 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. 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). 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). 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.

It is a technical parameter defining perpendicular break force, not the weight of an object in water. 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.

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 many market offers, Dhit does not cut corners on materials, which translates into a better results during treasure hunting.

A special technology of mounting the magnet in the protective cup builds a unified structure that dampens shocks while fishing on difficult, rocky bottoms.

Many distributors use a trick by advertising the pull force measured only on the vertical mount. GOLD mounts guarantees full transparency by providing the real parameters of the magnet, so you avoid disappointment during treasure hunting.

{Unlike anonymous sellers, Dhit provides full support and real warranty help, which is crucial after the transaction. Every mount is checked before delivery, which ensures that you receive equipment of the highest quality.

Pros and cons of Nd₂Fe₁₄B magnets.

Strengths

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

They have unchanged lifting capacity, and over more than ten years their attraction force decreases symbolically – ~1% (in testing),
They are extremely resistant to demagnetization induced by presence of other magnetic fields,
A magnet with a metallic nickel surface is more attractive,
Magnetic induction on the surface of the magnet is maximum,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
Possibility of precise forming as well as adapting to atypical applications,
Wide application in modern technologies – they are used in mass storage devices, brushless drives, precision medical tools, also complex engineering applications.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:

At very strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power 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
They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
Limited possibility of producing threads in the magnet and complex shapes - recommended is cover - magnet mounting.
Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these products can be problematic in diagnostics medical when they are in the body.
With budget limitations the cost of neodymium magnets is economically unviable,

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what affects it?

The specified lifting capacity refers to the limit force, obtained under laboratory conditions, specifically:

on a block made of structural steel, optimally conducting the magnetic field
possessing a massiveness of at least 10 mm to avoid saturation
with an polished contact surface
under conditions of gap-free contact (surface-to-surface)
for force acting at a right angle (pull-off, not shear)
at temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

In practice, the actual holding force is determined by several key aspects, listed from crucial:

Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
Angle of force application – maximum parameter is reached only during perpendicular pulling. The shear force of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
Steel grade – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
Smoothness – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
Temperature – temperature increase causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under shearing force the holding force is lower. In addition, even a small distance between the magnet and the plate lowers the holding force.

Safe handling of neodymium magnets

Adults only

Adult use only. Tiny parts can be swallowed, causing severe trauma. Keep out of reach of children and animals.

GPS and phone interference

GPS units and smartphones are highly susceptible to magnetism. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.

Permanent damage

Do not overheat. Neodymium magnets are susceptible to heat. If you need operation above 80°C, ask us about HT versions (H, SH, UH).

Medical implants

For implant holders: Powerful magnets affect medical devices. Keep minimum 30 cm distance or ask another person to work with the magnets.

Sensitization to coating

It is widely known that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, prevent touching magnets with bare hands and select versions in plastic housing.

Serious injuries

Large magnets can smash fingers in a fraction of a second. Under no circumstances put your hand between two attracting surfaces.

Mechanical processing

Machining of NdFeB material poses a fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Magnets are brittle

Protect your eyes. Magnets can explode upon violent connection, launching sharp fragments into the air. We recommend safety glasses.

Data carriers

Data protection: Neodymium magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, timepieces).

Do not underestimate power

Be careful. Neodymium magnets attract from a long distance and connect with huge force, often faster than you can move away.

Warning! Want to know more? Read our article: Are neodymium magnets dangerous?

UMP 79x50 [M8] GW - search holder

Physical properties - UMP 79x50 [M8] GW - search holder

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Sustainability

Pulling force

Field Strength

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Pros and cons of Nd2Fe14B magnets.

Strengths

Limitations

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what affects it?

Lifting capacity in real conditions – factors

Safe handling of neodymium magnets

Adults only

GPS and phone interference

Permanent damage

Medical implants

Sensitization to coating

Serious injuries

Mechanical processing

Magnets are brittle

Data carriers

Do not underestimate power

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Pros and cons of Nd₂Fe₁₄B magnets.