Product available Ships today (order by 14:00)

UMP 75x25 [M10x3] GW F200 PLATINIUM / N52 - 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 210422

GTIN/EAN: 5906301814078

5.00

Diameter Ø

75 mm [±1 mm]

Height

25 mm [±1 mm]

Weight

900 g

Load capacity

365.00 kg / 3579.43 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 8 000 Gauss [±5%]

technical details »

270.00 ZŁ with VAT / pcs + price for transport

219.51 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Hunting for a discount?

Contact us by phone +48 22 499 98 98 otherwise drop us a message through inquiry form through our site.
Weight and form of a magnet can be reviewed on our force calculator.

Orders placed before 14:00 will be shipped the same business day.

💡 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!

Technical data - UMP 75x25 [M10x3] GW F200 PLATINIUM / N52 - search holder

Specification / characteristics - UMP 75x25 [M10x3] GW F200 PLATINIUM / N52 - search holder

properties

properties	values
Cat. no.	210422
GTIN/EAN	5906301814078
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 ~ ?	365.00 kg / 3579.43 N
Coating	[NiCuNi] Nickel
Series	PLATINUM
Holder Type	2 sided
Material Type	Structural steel S235 (ferrous)
Magnetic Flux	~ 8 000 Gauss [±5%]
Size/Mount Quantity	3xM10
Manufacturing Tolerance	±1 mm

Magnetic properties of material N52

Specification / characteristics UMP 75x25 [M10x3] GW F200 PLATINIUM / N52 - search holder

properties	values	units
remenance Br [min. - max.] ?	14.2-14.7	kGs
remenance Br [min. - max.] ?	1420-1470	mT
coercivity bHc ?	10.8-12.5	kOe
coercivity bHc ?	860-995	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	48-53	BH max MGOe
energy density [min. - max.] ?	380-422	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 and environmental data

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%

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: 210422-2026

Measurement Calculator

Magnet pull force

Force in kg

Force (N)

lbs

Field Strength

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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. It is equipment that can handle pulling heavy and silted objects from the river bottom. 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. Single-sided magnets are usually lighter and cheaper but less effective for long throws.

This construction protects the brittle neodymium from direct impact against stones and the bottom. The housing significantly increases lifespan but does not make the magnet completely indestructible. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.

Most of our starter kits are complete and ready to use. A full set usually contains: magnet, polypropylene rope with appropriate strength, protective gloves, hook, and carabiner. Using thread glue is crucial to not lose the magnet in silt.

The capacity given in the name (e.g., 365.00 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.

Searches are allowed as long as you do not interfere with archaeological sites or search for weapons. Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.

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

The GOLD series feature a robust construction that provides a true shield for the magnetic core.

You should know that the identical magnet used by the lateral point can actually show as little as a fraction of power instead of the declared 200 kg. GOLD mounts focuses on full transparency by providing 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 local rivers and lakes. Don't risk it with unknown goods, stick with the market leader that ensures the happiness of searcher.

Strengths as well as weaknesses of rare earth magnets.

Advantages

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

They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (according to literature),
They possess excellent resistance to weakening of magnetic properties when exposed to opposing magnetic fields,
Thanks to the metallic finish, the surface of Ni-Cu-Ni, gold-plated, or silver gives an professional appearance,
The surface of neodymium magnets generates a concentrated magnetic field – this is a key feature,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
Due to the option of accurate forming and customization to individualized requirements, neodymium magnets can be created in a broad palette of forms and dimensions, which amplifies use scope,
Huge importance in electronics industry – they are used in data components, electric motors, precision medical tools, as well as modern systems.
Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of NdFeB magnets:

They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
When exposed to high temperature, neodymium magnets experience 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
Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
We recommend cover - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex shapes.
Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, small elements of these devices are able to complicate diagnosis medical when they are in the body.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what contributes to it?

The specified lifting capacity refers to the limit force, measured under optimal environment, specifically:

with the contact of a yoke made of special test steel, guaranteeing full magnetic saturation
possessing a thickness of min. 10 mm to ensure full flux closure
with a surface free of scratches
without any clearance between the magnet and steel
for force acting at a right angle (in the magnet axis)
in temp. approx. 20°C

Determinants of lifting force in real conditions

In practice, the real power is determined by a number of factors, listed from crucial:

Distance (between the magnet and the plate), since even a tiny distance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
Loading method – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of maximum force).
Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
Material type – the best choice is pure iron steel. Hardened steels may generate lower lifting capacity.
Plate texture – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces weaken the grip.
Temperature – heating the magnet results in weakening of force. Check the maximum operating temperature for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet and the plate lowers the load capacity.

Safe handling of NdFeB magnets

Respect the power

Handle magnets consciously. Their powerful strength can shock even professionals. Stay alert and respect their power.

Do not overheat magnets

Control the heat. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.

Threat to electronics

Do not bring magnets close to a wallet, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.

Pacemakers

Warning for patients: Powerful magnets disrupt electronics. Keep at least 30 cm distance or ask another person to handle the magnets.

Risk of cracking

Beware of splinters. Magnets can explode upon violent connection, launching shards into the air. Wear goggles.

Nickel coating and allergies

A percentage of the population suffer from a hypersensitivity to nickel, which is the typical protective layer for neodymium magnets. Frequent touching can result in an allergic reaction. We strongly advise use protective gloves.

Pinching danger

Large magnets can crush fingers in a fraction of a second. Never place your hand betwixt two strong magnets.

Threat to navigation

GPS units and smartphones are extremely sensitive to magnetic fields. Close proximity with a strong magnet can ruin the internal compass in your phone.

Swallowing risk

Only for adults. Small elements can be swallowed, leading to intestinal necrosis. Keep out of reach of kids and pets.

Fire warning

Fire warning: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.

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

UMP 75x25 [M10x3] GW F200 PLATINIUM / N52 - search holder

Technical data - UMP 75x25 [M10x3] GW F200 PLATINIUM / N52 - search holder

Magnetic properties of material N52

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Elemental analysis

Sustainability

Magnet pull force

Field Strength

Other deals

MP 20x5x27 / N38 - ring magnet

MPL 30x15x10 / N38 - lamellar magnet

CM PML-6 / N45 - magnetic gripper

UMGZ 48x24x11.5 [M8] GZ / N38 - magnetic holder external thread

Strengths as well as weaknesses of rare earth magnets.

Advantages

Cons

Pull force analysis

Optimal lifting capacity of a neodymium magnet – what contributes to it?

Determinants of lifting force in real conditions

Safe handling of NdFeB magnets

Respect the power

Do not overheat magnets

Threat to electronics

Pacemakers

Risk of cracking

Nickel coating and allergies

Pinching danger

Threat to navigation

Swallowing risk

Fire warning

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C