Product available Ships today (order by 14:00)

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%]

technical details »

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

Looking for a better price?

Pick up the phone and ask +48 888 99 98 98 alternatively drop us a message by means of contact form the contact form page.
Force along with form of magnetic components can be tested 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 of the product - 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

Engineering data and GPSR

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: 210339-2025

Measurement Calculator

Force (pull)

Kilograms (kg)

Force (N)

Force in lbs

Magnetic Field

Induction (T)

Input data in any box, to see all other values change instantly.

UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread

7.22 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

SM 32x175 [2xM8] / N52 - magnetic separator

602.70 ZŁ brutto / pcs

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MW 40x10 / N38 - cylindrical magnet

36.57 ZŁ brutto / pcs

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MW 45x25 / N38 - cylindrical magnet

101.55 ZŁ brutto / pcs

For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. 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.

Double-sided holders (Two-Side) have two active magnetic surfaces and two mounting holes. 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. Avoid throwing the magnet against bridge pillars or hard obstacles. After each fishing trip, we recommend rinsing the magnet with fresh water and drying it.

Check the product title and description to see if you are buying just the magnet or the XL set. In the package, you will find everything needed: strong rope (e.g., 20m), gloves, and hardware. 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. In a river, objects are often rusty, silted, or irregular in shape (e.g., pipes), which drastically reduces grip strength. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.

Searches are allowed as long as you do not interfere with archaeological sites or search for weapons. It is worth acting responsibly, cleaning up after yourself, and caring for the environment by removing fished-out scrap.

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

Consequently, despite the market price, the lifespan of the Dhit product puts it a step above other brands.

It is worth remembering that the same magnet pulled by the lateral point can actually show only a fraction of power instead of the declared 200 kg. The Dhit brand focuses on honest data by providing the actual capabilities of the gear, so you avoid disappointment during real field work.

{Unlike anonymous sellers, Dhit provides full support and instant warranty help, which gives peace of mind after the transaction. Instead of risking with random brands, stick with the market leader that ensures the happiness of searcher.

Pros and cons of rare earth magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:

They retain magnetic properties for almost 10 years – the drop is just ~1% (in theory),
Magnets perfectly resist against demagnetization caused by foreign field sources,
In other words, due to the smooth surface of silver, the element is aesthetically pleasing,
Neodymium magnets ensure maximum magnetic induction on a their surface, which allows for strong attraction,
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...
Thanks to flexibility in designing and the capacity to adapt to unusual requirements,
Fundamental importance in high-tech industry – they are used in computer drives, motor assemblies, medical devices, as well as industrial machines.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a strong case, which not only protects them against impacts but also increases their durability
When exposed to high temperature, neodymium magnets experience a drop in force. Often, when the temperature exceeds 80°C, their power 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
Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
We suggest casing - magnetic mechanism, due to difficulties in producing threads inside the magnet and complex forms.
Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small components of these products can be problematic in diagnostics medical in case of swallowing.
With budget limitations the cost of neodymium magnets is a challenge,

Lifting parameters

Highest magnetic holding force – what affects it?

The lifting capacity listed is a result of laboratory testing performed under specific, ideal conditions:

using a plate made of high-permeability steel, serving as a ideal flux conductor
possessing a thickness of minimum 10 mm to avoid saturation
characterized by smoothness
without the slightest clearance between the magnet and steel
for force acting at a right angle (in the magnet axis)
at standard ambient temperature

Lifting capacity in practice – influencing factors

During everyday use, the actual lifting capacity depends on several key aspects, listed from crucial:

Clearance – the presence of any layer (rust, tape, gap) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
Force direction – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
Steel grade – the best choice is pure iron steel. Stainless steels may have worse magnetic properties.
Plate texture – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
Thermal conditions – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas 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 holding force.

Safety rules for work with neodymium magnets

Fire warning

Fire warning: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.

Keep away from electronics

A powerful magnetic field interferes with the functioning of compasses in phones and navigation systems. Maintain magnets close to a smartphone to avoid breaking the sensors.

Medical interference

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Stay away if you have medical devices.

Electronic devices

Data protection: Strong magnets can ruin data carriers and delicate electronics (pacemakers, hearing aids, timepieces).

Do not underestimate power

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

Power loss in heat

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

Swallowing risk

Absolutely keep magnets out of reach of children. Choking hazard is high, and the effects of magnets connecting inside the body are fatal.

Physical harm

Big blocks can break fingers instantly. Under no circumstances put your hand between two strong magnets.

Allergy Warning

Medical facts indicate that nickel (standard magnet coating) is a potent allergen. For allergy sufferers, prevent direct skin contact and opt for coated magnets.

Fragile material

Watch out for shards. Magnets can fracture upon uncontrolled impact, launching shards into the air. We recommend safety glasses.

Caution! Want to know more? Read our article: Why are neodymium magnets dangerous?

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

Technical of the product - 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

Sustainability

Force (pull)

Magnetic Field

See also proposals

UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread

SM 32x175 [2xM8] / N52 - magnetic separator

MW 40x10 / N38 - cylindrical magnet

MW 45x25 / N38 - cylindrical magnet

Pros and cons of rare earth magnets.

Benefits

Limitations

Lifting parameters

Highest magnetic holding force – what affects it?

Lifting capacity in practice – influencing factors

Safety rules for work with neodymium magnets

Fire warning

Keep away from electronics

Medical interference

Electronic devices

Do not underestimate power

Power loss in heat

Swallowing risk

Physical harm

Allergy Warning

Fragile material

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C