Product available Ships tomorrow

UMP 135x40 [M10+M12] GW F 600 kg / 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 210339

GTIN/EAN: 5906301813989

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 technical specifications »

599.99 ZŁ with VAT / pcs + price for transport

487.80 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Call us now +48 22 499 98 98 if you prefer get in touch through request form the contact section.
Parameters as well as form of magnetic components can be analyzed on our magnetic mass 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 - UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

Specification / characteristics - UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

properties

properties	values
Cat. no.	210339
GTIN/EAN	5906301813989
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%]
Size/Mount Quantity	2xM10/1xM12
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 135x40 [M10+M12] GW F 600 kg / 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%

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: 210339-2026

Quick Unit Converter

Force (pull)

Force in kg

Force (N)

Force in lbs

Magnetic Induction

Induction (T)

Simply fill in a single box, to let the tool compute the rest for you.

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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. Model UMP 135x40 [M10+M12] GW F 600 kg / N38 offers an optimal weight-to-pull force ratio, which is important for repeated throwing. 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. 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%.

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., 680.00 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%. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.

Possessing and using a neodymium magnet to clean the bottom is generally legal, provided you are not searching for artifacts protected by law. It is worth acting responsibly, cleaning up after yourself, and caring for the environment by removing fished-out scrap.

In contrast to other brands, Dhit uses the highest quality materials, which translates into a clear advantage during every trip to the water.

The unique way of mounting the magnet in the Dhit housing creates a solid structure that dampens shocks while working on difficult, rocky bottoms.

Many sellers use a trick by promoting the power measured exclusively on the vertical mount. The Dhit brand focuses on honest data by providing the real parameters of the gear, so you avoid disappointment during real field work.

{In contrast to competitors importing from China, Dhit provides expert advice and real service assistance, which is crucial after the transaction. Don't risk it with unknown goods, it is better to choose proven gear that cares about the happiness of searcher.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:

They have stable power, and over around 10 years their performance decreases symbolically – ~1% (in testing),
They maintain their magnetic properties even under external field action,
A magnet with a smooth gold surface has an effective appearance,
Magnetic induction on the surface of the magnet remains extremely intense,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
Possibility of accurate shaping as well as optimizing to atypical requirements,
Huge importance in modern industrial fields – they are commonly used in computer drives, brushless drives, diagnostic systems, also multitasking production systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Characteristics of disadvantages of neodymium magnets and ways of using them

They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
When exposed to high temperature, neodymium magnets suffer a drop in strength. 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
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
We recommend casing - magnetic holder, due to difficulties in realizing threads inside the magnet and complex forms.
Possible danger related to microscopic parts of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets can disrupt the diagnostic process medical after entering the body.
With budget limitations the cost of neodymium magnets is a challenge,

Pull force analysis

Maximum holding power of the magnet – what affects it?

The specified lifting capacity represents the maximum value, recorded under laboratory conditions, meaning:

on a base made of structural steel, effectively closing the magnetic field
possessing a massiveness of min. 10 mm to avoid saturation
with a plane cleaned and smooth
without any air gap between the magnet and steel
under vertical application of breakaway force (90-degree angle)
at temperature approx. 20 degrees Celsius

Impact of factors on magnetic holding capacity in practice

Bear in mind that the magnet holding may be lower depending on the following factors, in order of importance:

Distance (between the magnet and the metal), as even a tiny clearance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, corrosion or debris).
Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
Plate thickness – too thin plate causes magnetic saturation, causing part of the power to be wasted to the other side.
Metal type – not every steel reacts the same. High carbon content worsen the interaction with the magnet.
Surface structure – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Roughness acts like micro-gaps.
Temperature – heating the magnet results in weakening of force. Check the maximum operating temperature for a given model.

Holding force was tested on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate lowers the load capacity.

Safety rules for work with NdFeB magnets

Respect the power

Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Think ahead.

Health Danger

People with a heart stimulator have to maintain an large gap from magnets. The magnetism can interfere with the operation of the implant.

Electronic hazard

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

Thermal limits

Standard neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. This process is irreversible.

Product not for children

These products are not toys. Eating a few magnets can lead to them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates urgent medical intervention.

Risk of cracking

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Collision of two magnets will cause them shattering into small pieces.

Fire warning

Fire hazard: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.

Pinching danger

Danger of trauma: The pulling power is so great that it can result in hematomas, crushing, and even bone fractures. Use thick gloves.

GPS Danger

An intense magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Keep magnets near a device to avoid breaking the sensors.

Avoid contact if allergic

Medical facts indicate that the nickel plating (the usual finish) is a potent allergen. If your skin reacts to metals, avoid direct skin contact and opt for encased magnets.

Safety First! Learn more about risks in the article: Magnet Safety Guide.

UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

Technical - UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Elemental analysis

Environmental data

Force (pull)

Magnetic Induction

View more deals

UMH 20x7x35 [M4] / N38 - magnetic holder with hook

SM 18x275 [2xM5] / N42 - magnetic separator

UMT 12x20 orange / N38 - board holder

MW 9.5x1 / N38 - cylindrical magnet

Advantages as well as disadvantages of Nd2Fe14B magnets.

Benefits

Cons

Pull force analysis

Maximum holding power of the magnet – what affects it?

Impact of factors on magnetic holding capacity in practice

Safety rules for work with NdFeB magnets

Respect the power

Health Danger

Electronic hazard

Thermal limits

Product not for children

Risk of cracking

Fire warning

Pinching danger

GPS Danger

Avoid contact if allergic

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.