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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

technical details »

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

Need advice?

Call us +48 22 499 98 98 or send us a note using request form the contact page.
Strength as well as appearance of magnets can be tested on our power 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!

Detailed specification - 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%

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: 210260-2026

Quick Unit Converter

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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. For beginners, we recommend lighter single-sided models (F80-F200), for advanced users - heavier double-sided (Two-Side) ones.

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. The double-sided version increases search efficiency by 100%.

The magnet is glued into a solid steel cup and sealed with epoxy resin, protecting it from water. 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. Using thread glue is crucial to not lose the magnet in silt.

The capacity given in the name (e.g., 340.00 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. It is worth acting responsibly, cleaning up after yourself, and caring for the environment by removing fished-out scrap.

Unlike other brands, Dhit uses the highest quality materials, which translates into a clear advantage during every trip to the water.

A special technology of gluing and seating the magnet in the protective cup builds a unified structure that absorbs impacts while working on difficult, rocky bottoms.

It is worth remembering that the identical magnet used by the lateral point can actually show as little as 40 kg of power instead of the promised 200 kg. Interestingly, in the entire internet, there are virtually no recordings demonstrating the actual strength of competitor products on the lateral attachment.

{By choosing Dhit, you support a local market leader that perfectly understands the specifics of local rivers and lakes. Instead of risking with unknown goods, it is better to choose proven gear that ensures the happiness of every user.

Pros as well as cons of rare earth magnets.

Pros

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

They have stable power, and over around ten years their performance decreases symbolically – ~1% (according to theory),
Magnets perfectly protect themselves against demagnetization caused by ambient magnetic noise,
In other words, due to the shiny surface of gold, the element looks attractive,
Magnets have excellent magnetic induction on the active area,
Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures reaching 230°C and above...
Considering the potential of flexible forming and customization to specialized projects, magnetic components can be manufactured in a wide range of forms and dimensions, which expands the range of possible applications,
Key role in high-tech industry – they serve a role in mass storage devices, brushless drives, medical equipment, and multitasking production systems.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Problematic aspects of neodymium magnets and ways of using them

At very strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
When exposed to high temperature, neodymium magnets suffer a drop in strength. 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 oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
Limited possibility of making nuts in the magnet and complicated shapes - recommended is cover - magnetic holder.
Potential hazard resulting from small fragments of magnets are risky, in case of ingestion, which gains importance in the context of child safety. Additionally, tiny parts of these magnets 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,

Holding force characteristics

Highest magnetic holding force – what affects it?

Magnet power is the result of a measurement for ideal contact conditions, taking into account:

with the use of a yoke made of special test steel, guaranteeing maximum field concentration
possessing a massiveness of minimum 10 mm to ensure full flux closure
with an ground contact surface
without any air gap between the magnet and steel
during pulling in a direction vertical to the mounting surface
at room temperature

Magnet lifting force in use – key factors

It is worth knowing that the magnet holding may be lower influenced by the following factors, in order of importance:

Distance – the presence of any layer (paint, tape, gap) interrupts the magnetic circuit, which lowers capacity steeply (even by 50% at 0.5 mm).
Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
Plate thickness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be lost into the air.
Material type – the best choice is pure iron steel. Cast iron may generate lower lifting capacity.
Surface condition – ground elements ensure maximum contact, which increases force. Rough surfaces weaken the grip.
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).

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

Safety rules for work with NdFeB magnets

ICD Warning

Life threat: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Keep away from computers

Device Safety: Neodymium magnets can damage data carriers and delicate electronics (pacemakers, medical aids, mechanical watches).

This is not a toy

Absolutely keep magnets away from children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are fatal.

Fire risk

Fire warning: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.

Powerful field

Handle magnets consciously. Their immense force can shock even professionals. Plan your moves and respect their power.

Bone fractures

Large magnets can break fingers instantly. Do not place your hand betwixt two strong magnets.

Magnet fragility

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Impact of two magnets will cause them shattering into small pieces.

Threat to navigation

A powerful magnetic field negatively affects the operation of magnetometers in smartphones and navigation systems. Maintain magnets near a smartphone to prevent damaging the sensors.

Do not overheat magnets

Keep cool. Neodymium magnets are sensitive to heat. If you need operation above 80°C, look for HT versions (H, SH, UH).

Warning for allergy sufferers

A percentage of the population have a sensitization to Ni, which is the common plating for NdFeB magnets. Prolonged contact might lead to a rash. We strongly advise use protective gloves.

Danger! Need more info? Read our article: Are neodymium magnets dangerous?

UMP 79x50 [M8] GW - search holder

Detailed specification - UMP 79x50 [M8] GW - search holder

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Environmental data

Magnet pull force

Magnetic Induction

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Pros as well as cons of rare earth magnets.

Pros

Limitations

Holding force characteristics

Highest magnetic holding force – what affects it?

Magnet lifting force in use – key factors

Safety rules for work with NdFeB magnets

ICD Warning

Keep away from computers

This is not a toy

Fire risk

Powerful field

Bone fractures

Magnet fragility

Threat to navigation

Do not overheat magnets

Warning for allergy sufferers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C