Product available Ships tomorrow

UMP 135x40 [M10+M12] GW F600 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 210385

GTIN/EAN: 5906301814047

5.00

Diameter Ø

135 mm [±1 mm]

Height

40 mm [±1 mm]

Weight

4300 g

Load capacity

680.00 kg / 6668.52 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 10 000 Gauss [±5%]

view specifications »

649.99 ZŁ with VAT / pcs + price for transport

528.45 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Can't decide what to choose?

Pick up the phone and ask +48 22 499 98 98 or get in touch using inquiry form through our site.
Lifting power as well as appearance of neodymium magnets can be verified on our online calculation tool.

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

💡 Check why professionals choose Dhit over cheap substitutes

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!

Detailed specification - UMP 135x40 [M10+M12] GW F600 Lina / N38 - search holder

Specification / characteristics - UMP 135x40 [M10+M12] GW F600 Lina / N38 - search holder

properties

properties	values
Cat. no.	210385
GTIN/EAN	5906301814047
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	135 mm [±1 mm]
Height	40 mm [±1 mm]
Weight	4300 g
Load capacity ~ ?	680.00 kg / 6668.52 N
Coating	[NiCuNi] Nickel
Holder Type	2 sided
Material Type	Structural steel S235 (ferrous)
Magnetic Flux	~ 10 000 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 N38

Specification / characteristics UMP 135x40 [M10+M12] GW F600 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 specification and ecology

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: 210385-2026

Measurement Calculator

Pulling force

Force in kg

lbs

Magnetic Field

Gauss (Gs)

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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 680.00 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.

The double-sided model attracts from above and below, increasing the chance of hooking a find. The side eyelet ensures the magnet doesn't stand sideways or "on edge" during pulling. The double-sided version increases search efficiency by 100%.

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. After each fishing trip, we recommend rinsing the magnet with fresh water and drying it.

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

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

Searches are allowed as long as you do not interfere with archaeological sites or search for weapons. We recommend familiarizing yourself with current local regulations and heritage protection laws.

It is the smartest investment because for the same money, you obtain a premium mount that will serve you for many seasons than generic imports.

Most magnets on the market have weak shells that crack during the first hard impact against concrete or rocks.

Many sellers employ a tactic by advertising the power measured exclusively on the top hook. Crucially, in the entire internet, there are virtually no recordings testing the real side-pull force of other brands on the lateral attachment.

{Unlike anonymous sellers, Dhit provides full support and real warranty help, which is crucial after the purchase. Every mount is checked before delivery, which ensures that you receive equipment of the highest quality.

Advantages as well as disadvantages of rare earth magnets.

Strengths

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

Their power remains stable, and after around 10 years it decreases only by ~1% (theoretically),
Neodymium magnets are distinguished by highly resistant to loss of magnetic properties caused by external interference,
A magnet with a smooth nickel surface has better aesthetics,
They are known for high magnetic induction at the operating surface, which improves attraction properties,
Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures approaching 230°C and above...
Thanks to the possibility of flexible molding and adaptation to unique requirements, neodymium magnets can be modeled in a broad palette of forms and dimensions, which makes them more universal,
Key role in electronics industry – they are commonly used in hard drives, motor assemblies, medical equipment, as well as multitasking production systems.
Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which makes them useful in small systems

Weaknesses

What to avoid - cons of neodymium magnets: application proposals

To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
When exposed to high temperature, neodymium magnets suffer a drop in power. 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
Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
We suggest casing - magnetic holder, due to difficulties in realizing threads inside the magnet and complex shapes.
Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these products are able to disrupt the diagnostic process medical after entering the body.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

Best holding force of the magnet in ideal parameters – what contributes to it?

Breakaway force was defined for ideal contact conditions, including:

on a base made of structural steel, optimally conducting the magnetic field
whose thickness equals approx. 10 mm
with an ideally smooth contact surface
under conditions of gap-free contact (metal-to-metal)
during pulling in a direction vertical to the mounting surface
at conditions approx. 20°C

Magnet lifting force in use – key factors

During everyday use, the actual holding force is determined by several key aspects, listed from most significant:

Distance – the presence of foreign body (paint, tape, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
Force direction – remember that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
Steel thickness – too thin steel does not close the flux, causing part of the power to be escaped into the air.
Steel type – low-carbon steel attracts best. Alloy steels reduce magnetic properties and holding force.
Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Uneven metal reduce efficiency.
Temperature influence – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.

Safe handling of neodymium magnets

Choking Hazard

Strictly keep magnets away from children. Choking hazard is significant, and the consequences of magnets connecting inside the body are fatal.

Beware of splinters

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

Pacemakers

Individuals with a pacemaker should keep an safe separation from magnets. The magnetic field can stop the functioning of the implant.

Do not drill into magnets

Machining of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Demagnetization risk

Watch the temperature. Exposing the magnet to high heat will permanently weaken its properties and strength.

Data carriers

Device Safety: Neodymium magnets can ruin data carriers and sensitive devices (pacemakers, medical aids, timepieces).

Impact on smartphones

Remember: neodymium magnets produce a field that disrupts sensitive sensors. Keep a separation from your phone, device, and GPS.

Bone fractures

Protect your hands. Two powerful magnets will join immediately with a force of massive weight, destroying everything in their path. Be careful!

Avoid contact if allergic

Some people experience a contact allergy to nickel, which is the common plating for neodymium magnets. Extended handling may cause a rash. We strongly advise wear safety gloves.

Powerful field

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

Attention! More info about hazards in the article: Magnet Safety Guide.

UMP 135x40 [M10+M12] GW F600 Lina / N38 - search holder

Detailed specification - UMP 135x40 [M10+M12] GW F600 Lina / N38 - search holder

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Elemental analysis

Sustainability

Pulling force

Magnetic Field

Other offers

BM 850x180x70 [4x M8] - magnetic beam

UMGGW 43x6 [M4] GW / N38 - magnetic holder rubber internal thread

UMC 75x11/6x18 / N38 - cylindrical magnetic holder

SM 32x250 [2xM8] / N52 - magnetic separator

Advantages as well as disadvantages of rare earth magnets.

Strengths

Weaknesses

Lifting parameters

Best holding force of the magnet in ideal parameters – what contributes to it?

Magnet lifting force in use – key factors

Safe handling of neodymium magnets

Choking Hazard

Beware of splinters

Pacemakers

Do not drill into magnets

Demagnetization risk

Data carriers

Impact on smartphones

Bone fractures

Avoid contact if allergic

Powerful field

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C