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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: 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%]

check specifications »

599.99 ZŁ with VAT / pcs + price for transport

487.80 ZŁ net + 23% VAT / pcs

bulk discounts:

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458.53 ZŁ

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Not sure about your choice?

Call us now +48 888 99 98 98 or contact us through form the contact form page.
Specifications along with form of magnetic components can be checked using our our magnetic 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!

Physical properties - 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

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: 210339-2026

Measurement Calculator

Pulling force

Kilograms (kg)

lbs

Magnetic Induction

Gauss (Gs)

Induction (T)

Input your value in a single slot to see the conversion in all other units at once.

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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. 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. Top mounting works well when fishing from a bridge, pier, or well (vertical technique). 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). 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.

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. Using thread glue is crucial to not lose the magnet in silt.

This force applies to perfect adherence with the entire surface to a smooth, clean steel plate with a min. thickness of 20mm. The magnet may slide on round elements (bicycle frame) due to the small contact area. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.

If you find a dangerous object (unexploded ordnance) or an antique, you have a legal obligation to report it to appropriate services (Police, conservator). Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.

By choosing the Dhit brand, you receive a product of a significantly higher standard and true magnetic power for the average cost.

A special technology of mounting the magnet in the protective cup creates a solid structure that dampens shocks while fishing on rough surfaces.

Many distributors employ a tactic by promoting the pull force measured only on the vertical mount. The Dhit brand guarantees honest data by stating the actual capabilities of the gear, so you can be sure during real field work.

{By choosing GOLD mounts, you bet on a local market leader that perfectly understands the conditions of our waters. Don't risk it with unknown goods, stick with the market leader that cares about the happiness of searcher.

Strengths and weaknesses of neodymium magnets.

Strengths

Besides their stability, neodymium magnets are valued for these benefits:

They retain full power for around ten years – the loss is just ~1% (according to analyses),
They feature excellent resistance to magnetism drop due to external magnetic sources,
A magnet with a smooth nickel surface has an effective appearance,
Magnetic induction on the working layer of the magnet is impressive,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
Thanks to the possibility of precise molding and customization to specialized needs, NdFeB magnets can be modeled in a wide range of forms and dimensions, which expands the range of possible applications,
Wide application in electronics industry – they are used in HDD drives, electromotive mechanisms, precision medical tools, and modern systems.
Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Limitations

Problematic aspects of neodymium magnets and ways of using them

They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
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 and 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 usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
We recommend cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complex shapes.
Health risk related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, small elements of these magnets can disrupt the diagnostic process medical in case of swallowing.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Detachment force of the magnet in optimal conditions – what affects it?

Magnet power was defined for the most favorable conditions, assuming:

with the use of a yoke made of special test steel, ensuring maximum field concentration
with a cross-section minimum 10 mm
characterized by smoothness
without the slightest air gap between the magnet and steel
under vertical application of breakaway force (90-degree angle)
in stable room temperature

Lifting capacity in real conditions – factors

Holding efficiency is affected by working environment parameters, mainly (from most important):

Distance (between the magnet and the metal), since even a tiny distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to varnish, rust or dirt).
Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of generating force.
Steel type – low-carbon steel gives the best results. Higher carbon content decrease magnetic properties and lifting capacity.
Surface condition – ground elements ensure maximum contact, which increases field saturation. Uneven metal weaken the grip.
Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the holding force is lower. In addition, even a slight gap between the magnet and the plate decreases the load capacity.

Safe handling of NdFeB magnets

Caution required

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

Adults only

These products are not toys. Accidental ingestion of a few magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and necessitates urgent medical intervention.

Life threat

Individuals with a pacemaker should keep an large gap from magnets. The magnetism can stop the functioning of the life-saving device.

Dust explosion hazard

Machining of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.

Threat to electronics

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

Metal Allergy

A percentage of the population experience a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Extended handling can result in a rash. We recommend wear protective gloves.

Do not overheat magnets

Regular neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.

Magnet fragility

NdFeB magnets are ceramic materials, which means they are very brittle. Impact of two magnets will cause them shattering into small pieces.

Crushing risk

Big blocks can break fingers in a fraction of a second. Under no circumstances put your hand betwixt two strong magnets.

Keep away from electronics

GPS units and smartphones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

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

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

Physical properties - 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

Chemical composition

Ecology and recycling (GPSR)

Pulling force

Magnetic Induction

See also deals

FM Ruszt magnetyczny do leja fi 200 dwupoziomowy / N52 - magnetic filter

SM 18x175 [2xM5] / N42 - magnetic separator

NCM 40x13.5x5 / N38 - channel magnetic holder

UMP 94x40 [3xM10] GW F550 Silver Black / N52 - search holder

Strengths and weaknesses of neodymium magnets.

Strengths

Limitations

Holding force characteristics

Detachment force of the magnet in optimal conditions – what affects it?

Lifting capacity in real conditions – factors

Safe handling of NdFeB magnets

Caution required

Adults only

Life threat

Dust explosion hazard

Threat to electronics

Metal Allergy

Do not overheat magnets

Magnet fragility

Crushing risk

Keep away from electronics

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C