Product available Ships today (order by 14:00)

UMP 94x40 [3xM10] GW F550 Silver Black Lina / 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 210491

GTIN/EAN: 5906301814153

5.00

Diameter Ø

94 mm [±1 mm]

Height

40 mm [±1 mm]

Weight

2262 g

Magnetization Direction

↑ axial

Load capacity

650.00 kg / 6374.32 N

Coating

[Epoxy] Epoxy

Magnetic Flux

~ 11 000 Gauss [±5%]

check parameters »

400.00 ZŁ with VAT / pcs + price for transport

325.20 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

325.20 ZŁ

400.00 ZŁ

price from 5 pcs

305.69 ZŁ

376.00 ZŁ

price from 10 pcs

286.18 ZŁ

352.00 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure where to buy?

Call us now +48 22 499 98 98 or drop us a message using request form the contact form page.
Parameters along with appearance of magnets can be reviewed with our force calculator.

Order by 14:00 and we’ll ship today!

💡 Check why professionals choose Dhit over cheap substitutes

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 94x40 [3xM10] GW F550 Silver Black Lina / N52 - search holder

Specification / characteristics - UMP 94x40 [3xM10] GW F550 Silver Black Lina / N52 - search holder

properties

properties	values
Cat. no.	210491
GTIN/EAN	5906301814153
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	94 mm [±1 mm]
Height	40 mm [±1 mm]
Weight	2262 g
Magnetization Direction	↑ axial
Load capacity ~ ?	650.00 kg / 6374.32 N
Coating	[Epoxy] Epoxy
Series	SilverBlack
Holder Type	2 sided
Material Type	Structural steel S235 (ferrous)
Magnetic Flux	~ 11 000 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 N52

Specification / characteristics UMP 94x40 [3xM10] GW F550 Silver Black Lina / 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

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%

Ecology and recycling (GPSR)

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: 210491-2026

Measurement Calculator

Force (pull)

Kilograms (kg)

Force in lbs

Magnetic Induction

Tesla (T)

Put your value in a single field to receive results for all other units at once.

MP 8x6/3.5x3 / N38 - ring magnet

0.701 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

UMH 32x8x46 [M6] / N38 - magnetic holder with hook

22.14 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

SM 25x100 [2xM8] / N42 - magnetic separator

246.00 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MPL 5x5x2 / N38 - lamellar magnet

0.308 ZŁ brutto / pcs

For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. This specific magnet ensures a laboratory lifting capacity of up to 650.00 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. Side mounting is ideal for throwing from the shore, as the magnet drags flat along the bottom. 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.

We offer both standalone holders and ready-made gift sets (depending on the selected option in the store). 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.

This force applies to perfect adherence with the entire surface to a smooth, clean steel plate with a min. thickness of 20mm. 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.

If you find a dangerous object (unexploded ordnance) or an antique, you have a legal obligation to report it to appropriate services (Police, conservator). 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 every trip to the water.

Most competitor mounts have weak shells that deform during the any strong impact against concrete or rocks.

You should know that the same magnet used by the side hook can actually show as little as a fraction of power instead of the declared 200 kg. Interestingly, in the web, there are virtually no recordings testing the actual strength of competitor products on the lateral attachment.

{By choosing GOLD mounts, you support a local market leader that knows the specifics of local rivers and lakes. Every mount is individually inspected before delivery, which ensures that you receive equipment of the defect-free.

Advantages as well as disadvantages of neodymium magnets.

Pros

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

They retain attractive force for nearly 10 years – the drop is just ~1% (in theory),
They show high resistance to demagnetization induced by external field influence,
By applying a decorative layer of nickel, the element has an aesthetic look,
Magnetic induction on the working layer of the magnet is extremely intense,
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 precise creating as well as adapting to defined applications,
Versatile presence in advanced technology sectors – they serve a role in magnetic memories, motor assemblies, diagnostic systems, also modern systems.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in compact constructions

Cons

Cons of neodymium magnets and proposals for their use:

At very strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
We suggest a housing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated shapes.
Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. Furthermore, tiny parts of these devices are able to disrupt the diagnostic process medical in case of swallowing.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what affects it?

Magnet power is the result of a measurement for optimal configuration, assuming:

with the contact of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
with a cross-section no less than 10 mm
with an polished contact surface
under conditions of no distance (surface-to-surface)
for force acting at a right angle (in the magnet axis)
in neutral thermal conditions

Determinants of practical lifting force of a magnet

In practice, the real power results from many variables, presented from crucial:

Distance – the presence of any layer (paint, tape, gap) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
Direction of force – maximum parameter is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
Plate material – mild steel attracts best. Alloy admixtures reduce magnetic permeability and lifting capacity.
Smoothness – ideal contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
Thermal environment – heating the magnet results in weakening of induction. Check the thermal limit for a given model.

Lifting capacity was determined using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the holding force is lower. Moreover, even a slight gap between the magnet and the plate reduces the load capacity.

Precautions when working with neodymium magnets

Metal Allergy

Certain individuals experience a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact might lead to an allergic reaction. We strongly advise use protective gloves.

Do not drill into magnets

Mechanical processing of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Keep away from computers

Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Keep a distance of at least 10 cm.

GPS Danger

A strong magnetic field disrupts the operation of magnetometers in phones and navigation systems. Keep magnets close to a smartphone to prevent damaging the sensors.

Protective goggles

Beware of splinters. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.

Safe operation

Before use, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.

Crushing risk

Pinching hazard: The pulling power is so great that it can result in blood blisters, pinching, and broken bones. Use thick gloves.

Danger to pacemakers

Individuals with a heart stimulator should keep an absolute distance from magnets. The magnetism can interfere with the functioning of the implant.

Swallowing risk

Only for adults. Small elements can be swallowed, causing serious injuries. Keep out of reach of children and animals.

Maximum temperature

Avoid heat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Caution! Looking for details? Read our article: Why are neodymium magnets dangerous?

UMP 94x40 [3xM10] GW F550 Silver Black Lina / N52 - search holder

Technical data - UMP 94x40 [3xM10] GW F550 Silver Black Lina / N52 - search holder

Magnetic properties of material N52

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Ecology and recycling (GPSR)

Force (pull)

Magnetic Induction

See also proposals

MP 8x6/3.5x3 / N38 - ring magnet

UMH 32x8x46 [M6] / N38 - magnetic holder with hook

SM 25x100 [2xM8] / N42 - magnetic separator

MPL 5x5x2 / N38 - lamellar magnet

Advantages as well as disadvantages of neodymium magnets.

Pros

Cons

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what affects it?

Determinants of practical lifting force of a magnet

Precautions when working with neodymium magnets

Metal Allergy

Do not drill into magnets

Keep away from computers

GPS Danger

Protective goggles

Safe operation

Crushing risk

Danger to pacemakers

Swallowing risk

Maximum temperature

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C