Product on order Ships in 3-5 days

UMP 65x45 [M8]x2 GW F230+ Lina / 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 210386

GTIN/EAN: 5906301814054

5.00

Diameter Ø

65 mm [±1 mm]

Height

45 mm [±1 mm]

Weight

1170 g

Load capacity

230.00 kg / 2255.53 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 6 000 Gauss [±5%]

technical parameters »

180.00 ZŁ with VAT / pcs + price for transport

146.34 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

146.34 ZŁ

180.00 ZŁ

price from 10 pcs

137.56 ZŁ

169.20 ZŁ

price from 20 pcs

128.78 ZŁ

158.40 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure about your choice?

Pick up the phone and ask +48 888 99 98 98 or drop us a message via contact form our website.
Parameters along with structure of a magnet can be analyzed on our magnetic calculator.

Same-day shipping for orders placed before 14:00.

💡 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 parameters - UMP 65x45 [M8]x2 GW F230+ Lina / N38 - search holder

Specification / characteristics - UMP 65x45 [M8]x2 GW F230+ Lina / N38 - search holder

properties

properties	values
Cat. no.	210386
GTIN/EAN	5906301814054
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	65 mm [±1 mm]
Height	45 mm [±1 mm]
Weight	1170 g
Load capacity ~ ?	230.00 kg / 2255.53 N
Coating	[NiCuNi] Nickel
Holder Type	2 sided
Material Type	Structural steel S235 (ferrous)
Magnetic Flux	~ 6 000 Gauss [±5%]
Rope Length	25 m
Rope Capacity	~ 1595 kg
Rope Diameter	Ø 8 mm
Gloves	1 pair
Size/Mount Quantity	1xM8/2xM10
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 65x45 [M8]x2 GW F230+ Lina / 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 and environmental data

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: 210386-2026

Measurement Calculator

Magnet pull force

Kilograms (kg)

Force (N)

lbs

Field Strength

Induction (Gs)

Enter a value in one of the inputs, and the remaining fields convert in real-time.

Other proposals

Product on order Ships in 3-5 days

MW 16x4 / N38 - cylindrical magnet

3.39 ZŁ brutto / pcs

Product on order Ships in 3-5 days

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

59.90 ZŁ brutto / pcs

Product on order Ships in 3-5 days

MP 40x20x5 / N38 - ring magnet

12.24 ZŁ brutto / pcs

Product on order Ships in 3-5 days

SM 25x325 [2xM8] / N52 - magnetic separator

984.00 ZŁ brutto / pcs

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.

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). 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.

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. We recommend always securing the thread with glue or tightening the eyelet firmly before first use.

The capacity given in the name (e.g., 230.00 kg) is the maximum value measured in laboratory conditions. 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.

Possessing and using a neodymium magnet to clean the bottom is generally legal, provided you are not searching for artifacts protected by law. We recommend familiarizing yourself with current local regulations and heritage protection laws.

In contrast to many market offers, Dhit uses the highest quality components, which translates into a better results during treasure hunting.

As a result, despite the market price, the lifespan of the Dhit product puts it far ahead of the competition.

It is worth remembering that the identical mount used by the side hook can actually show only a fraction of power instead of the declared 200 kg. Interestingly, in the web, there are virtually no recordings testing the actual strength of other brands on the side hook.

{By choosing GOLD mounts, you support Polish engineering that perfectly understands the conditions of local rivers and lakes. Every mount is individually inspected before shipping, which guarantees that you receive equipment of the highest quality.

Strengths and weaknesses of neodymium magnets.

Pros

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

They virtually do not lose power, because even after ten years the performance loss is only ~1% (based on calculations),
They maintain their magnetic properties even under external field action,
A magnet with a metallic silver surface has better aesthetics,
Neodymium magnets achieve maximum magnetic induction on a small area, which increases force concentration,
Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
Possibility of accurate creating and adapting to atypical requirements,
Universal use in electronics industry – they are commonly used in hard drives, electric motors, precision medical tools, also modern systems.
Thanks to their power density, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of neodymium magnets:

They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
We suggest casing - magnetic mount, due to difficulties in producing threads inside the magnet and complicated shapes.
Health risk to health – tiny shards of magnets pose a threat, in case of ingestion, which gains importance in the context of child health protection. Furthermore, small elements of these products are able to disrupt the diagnostic process medical after entering the body.
Due to neodymium price, their price exceeds standard values,

Holding force characteristics

Maximum lifting force for a neodymium magnet – what contributes to it?

Breakaway force was defined for optimal configuration, taking into account:

using a base made of low-carbon steel, acting as a magnetic yoke
whose transverse dimension reaches at least 10 mm
with a surface cleaned and smooth
without any clearance between the magnet and steel
during pulling in a direction perpendicular to the mounting surface
at conditions approx. 20°C

Practical lifting capacity: influencing factors

During everyday use, the actual holding force is determined by several key aspects, ranked from crucial:

Distance – existence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
Temperature influence – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was determined with the use of a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate lowers the lifting capacity.

Safety rules for work with neodymium magnets

Metal Allergy

Some people suffer from a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Frequent touching might lead to a rash. We recommend use safety gloves.

Do not drill into magnets

Dust produced during machining of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

ICD Warning

People with a heart stimulator have to maintain an safe separation from magnets. The magnetism can disrupt the functioning of the life-saving device.

Maximum temperature

Monitor thermal conditions. Exposing the magnet to high heat will ruin its properties and pulling force.

Finger safety

Watch your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Risk of cracking

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

Danger to the youngest

Always keep magnets away from children. Ingestion danger is high, and the effects of magnets connecting inside the body are fatal.

Data carriers

Very strong magnetic fields can destroy records on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

Phone sensors

A powerful magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Keep magnets close to a smartphone to prevent breaking the sensors.

Conscious usage

Before use, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.

Important! Looking for details? Read our article: Are neodymium magnets dangerous?

UMP 65x45 [M8]x2 GW F230+ Lina / N38 - search holder

Technical parameters - UMP 65x45 [M8]x2 GW F230+ Lina / N38 - search holder

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Ecology and recycling (GPSR)

Magnet pull force

Field Strength

Other proposals

MW 16x4 / N38 - cylindrical magnet

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

MP 40x20x5 / N38 - ring magnet

SM 25x325 [2xM8] / N52 - magnetic separator

Strengths and weaknesses of neodymium magnets.

Pros

Weaknesses

Holding force characteristics

Maximum lifting force for a neodymium magnet – what contributes to it?

Practical lifting capacity: influencing factors

Safety rules for work with neodymium magnets

Metal Allergy

Do not drill into magnets

ICD Warning

Maximum temperature

Finger safety

Risk of cracking

Danger to the youngest

Data carriers

Phone sensors

Conscious usage

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C