Product on order Ships in 3-5 days

UMP 50x20 [M8] GW / 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 210231

GTIN/EAN: 5906301813910

5.00

Diameter Ø

50 mm [±1 mm]

Height

20 mm [±1 mm]

Weight

0.6 g

Load capacity

130.00 kg / 1274.86 N

Coating

[NiCuNi] Nickel

product details »

77.00 ZŁ with VAT / pcs + price for transport

62.60 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Contact us by phone +48 22 499 98 98 alternatively let us know by means of request form the contact section.
Strength along with structure of magnets can be calculated on our modular 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!

Technical parameters of the product - UMP 50x20 [M8] GW / N38 - search holder

Specification / characteristics - UMP 50x20 [M8] GW / N38 - search holder

properties

properties	values
Cat. no.	210231
GTIN/EAN	5906301813910
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	50 mm [±1 mm]
Height	20 mm [±1 mm]
Weight	0.6 g
Load capacity ~ ?	130.00 kg / 1274.86 N
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 50x20 [M8] GW / 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

Material specification

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: 210231-2026

Magnet Unit Converter

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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. Model UMP 50x20 [M8] GW / 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 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. 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.

Our holders have a thick steel housing covered with an anti-corrosion layer (chrome, nickel, zinc). Avoid throwing the magnet against bridge pillars or hard obstacles. 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). 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. In a river, objects are often rusty, silted, or irregular in shape (e.g., pipes), which drastically reduces grip strength. A large power reserve is essential in real search conditions.

If you find a dangerous object (unexploded ordnance) or an antique, you have a legal obligation to report it to appropriate services (Police, conservator). We recommend familiarizing yourself with current local regulations and heritage protection laws.

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

A special technology of gluing and seating the magnet in the protective cup builds a unified structure that absorbs impacts while fishing on rough surfaces.

It is worth remembering that the same magnet pulled by the lateral point often has only 40 kg of strength instead of the promised 200 kg. GOLD mounts guarantees full transparency by stating the real parameters of the gear, so you avoid disappointment during treasure hunting.

{By choosing GOLD mounts, you bet on a local market leader that perfectly understands the specifics of our waters. Don't risk it with unknown goods, it is better to choose the market leader that cares about the satisfaction of searcher.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Benefits

Besides their immense strength, neodymium magnets offer the following advantages:

They retain magnetic properties for nearly 10 years – the loss is just ~1% (in theory),
They show high resistance to demagnetization induced by external field influence,
The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to present itself better,
They feature high magnetic induction at the operating surface, which improves attraction properties,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
Thanks to flexibility in designing and the capacity to customize to specific needs,
Key role in high-tech industry – they serve a role in HDD drives, electric drive systems, diagnostic systems, as well as modern systems.
Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in miniature devices

Limitations

Characteristics of disadvantages of neodymium magnets and proposals for their use:

They are fragile upon heavy 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 force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as 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 - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
Due to limitations in producing nuts and complex shapes in magnets, we recommend using cover - magnetic mechanism.
Potential hazard related to microscopic parts of magnets are risky, if swallowed, which gains importance in the context of child safety. Furthermore, small components of these devices can be problematic in diagnostics medical after entering the body.
Due to neodymium price, their price exceeds standard values,

Pull force analysis

Highest magnetic holding force – what affects it?

Magnet power was defined for optimal configuration, including:

with the use of a sheet made of low-carbon steel, ensuring full magnetic saturation
with a cross-section minimum 10 mm
with a plane perfectly flat
without any air gap between the magnet and steel
for force acting at a right angle (pull-off, not shear)
at ambient temperature approx. 20 degrees Celsius

Magnet lifting force in use – key factors

Effective lifting capacity is affected by specific conditions, mainly (from priority):

Gap (betwixt the magnet and the plate), as even a microscopic clearance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to varnish, rust or dirt).
Angle of force application – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
Material composition – not every steel reacts the same. Alloy additives worsen the interaction with the magnet.
Surface condition – ground elements ensure maximum contact, which increases field saturation. Uneven metal weaken the grip.
Thermal environment – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the load capacity is reduced by as much as 5 times. Additionally, even a minimal clearance between the magnet’s surface and the plate decreases the load capacity.

Safety rules for work with NdFeB magnets

Swallowing risk

Adult use only. Small elements can be swallowed, causing severe trauma. Store away from children and animals.

Heat sensitivity

Regular neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. Damage is permanent.

Compass and GPS

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

Implant safety

Health Alert: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

Pinching danger

Danger of trauma: The pulling power is so great that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.

Fire risk

Dust created during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.

Allergy Warning

It is widely known that nickel (the usual finish) is a strong allergen. If you have an allergy, avoid touching magnets with bare hands or select coated magnets.

Data carriers

Very strong magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Stay away of min. 10 cm.

Respect the power

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

Protective goggles

Beware of splinters. Magnets can fracture upon violent connection, launching shards into the air. We recommend safety glasses.

Danger! Want to know more? Check our post: Are neodymium magnets dangerous?

UMP 50x20 [M8] GW / N38 - search holder

Technical parameters of the product - UMP 50x20 [M8] GW / N38 - search holder

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Material specification

Environmental data

Pulling force

Field Strength

Other deals

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

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

MPL 13x10x5 / N35H - lamellar magnet

SM 32x250 [2xM8] / N42 - magnetic separator

Advantages as well as disadvantages of Nd2Fe14B magnets.

Benefits

Limitations

Pull force analysis

Highest magnetic holding force – what affects it?

Magnet lifting force in use – key factors

Safety rules for work with NdFeB magnets

Swallowing risk

Heat sensitivity

Compass and GPS

Implant safety

Pinching danger

Fire risk

Allergy Warning

Data carriers

Respect the power

Protective goggles

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.