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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: 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%]

check properties »

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

Want to talk magnets?

Call us now +48 888 99 98 98 if you prefer let us know through request form the contact section.
Force and appearance of magnetic components can be checked using our online calculation tool.

Orders submitted before 14:00 will be dispatched 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 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

Technical and environmental data

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

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UMP 107x40 [M8+M10] GW F400 Lina / N38 - search holder

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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 double-sided model attracts from above and below, increasing the chance of hooking a find. Side mounting is ideal for throwing from the shore, as the magnet drags flat along the bottom. Single-sided magnets are usually lighter and cheaper but less effective for long throws.

This construction protects the brittle neodymium from direct impact against stones and the bottom. 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.

Most of our starter kits are complete and ready to use. 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.

It is a technical parameter defining perpendicular break force, not the weight of an object in water. 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.

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.

By selecting Dhit GOLD mounts, you receive a higher quality standard and true magnetic power for the same market price.

Dhit GOLD mounts feature a robust construction that provides a true shield for the magnetic core.

Many sellers employ a tactic by promoting the power tested only on the top hook. The Dhit brand focuses on full transparency by providing the actual capabilities of the gear, so you avoid disappointment during real field work.

{By choosing GOLD mounts, you bet on a local market leader that perfectly understands the conditions of our waters. Every mount is checked before shipping, which guarantees that you the set will be of the defect-free.

Pros and cons of rare earth magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:

They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (based on calculations),
They possess excellent resistance to weakening of magnetic properties due to external fields,
In other words, due to the metallic finish of gold, the element gains a professional look,
They show high magnetic induction at the operating surface, making them more effective,
Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
In view of the option of free shaping and adaptation to custom needs, neodymium magnets can be created in a broad palette of forms and dimensions, which expands the range of possible applications,
Versatile presence in future technologies – they are used in computer drives, electric motors, medical devices, as well as complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which enables their usage in small systems

Limitations

Drawbacks and weaknesses of neodymium magnets: application proposals

At very strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
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
When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
Due to limitations in producing nuts and complex forms in magnets, we propose using a housing - magnetic mount.
Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. Furthermore, small components of these devices can be problematic in diagnostics medical when they are in the body.
With large orders the cost of neodymium magnets is a challenge,

Lifting parameters

Maximum holding power of the magnet – what affects it?

Information about lifting capacity was determined for optimal configuration, including:

on a plate made of mild steel, perfectly concentrating the magnetic field
possessing a thickness of at least 10 mm to avoid saturation
with a surface perfectly flat
without any clearance between the magnet and steel
for force acting at a right angle (in the magnet axis)
in neutral thermal conditions

Lifting capacity in real conditions – factors

It is worth knowing that the working load may be lower influenced by elements below, starting with the most relevant:

Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Load vector – maximum parameter is reached only during perpendicular pulling. The resistance to sliding of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
Material type – the best choice is high-permeability steel. Cast iron may attract less.
Surface condition – ground elements guarantee perfect abutment, which improves field saturation. Uneven metal weaken the grip.
Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the holding force is lower. Moreover, even a small distance between the magnet and the plate lowers the holding force.

Safety rules for work with NdFeB magnets

Danger to the youngest

Neodymium magnets are not toys. Eating a few magnets can lead to them attracting across intestines, which constitutes a direct threat to life and necessitates immediate surgery.

Permanent damage

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

Electronic hazard

Intense magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.

Handling guide

Handle magnets consciously. Their huge power can shock even professionals. Be vigilant and do not underestimate their power.

Life threat

For implant holders: Powerful magnets affect electronics. Keep minimum 30 cm distance or request help to work with the magnets.

Warning for allergy sufferers

It is widely known that nickel (the usual finish) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands and choose coated magnets.

GPS Danger

GPS units and mobile phones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.

Machining danger

Fire hazard: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.

Protective goggles

Despite the nickel coating, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

Serious injuries

Large magnets can crush fingers in a fraction of a second. Never place your hand between two attracting surfaces.

Safety First! Learn more about risks in the article: Safety of working with magnets.

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

Magnet pull force

Field Strength

See also proposals

SMZR 32x150 / N52 - magnetic separator with handle

SM 32x400 [2xM8] / N42 - magnetic separator

UMP 107x40 [M8+M10] GW F400 Lina / N38 - search holder

SM 25x125 [2xM8] / N52 - magnetic separator

Pros and cons of rare earth magnets.

Strengths

Limitations

Lifting parameters

Maximum holding power of the magnet – what affects it?

Lifting capacity in real conditions – factors

Safety rules for work with NdFeB magnets

Danger to the youngest

Permanent damage

Electronic hazard

Handling guide

Life threat

Warning for allergy sufferers

GPS Danger

Machining danger

Protective goggles

Serious injuries

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C