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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%]

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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?

Call us now +48 888 99 98 98 if you prefer drop us a message by means of request form the contact section.
Specifications as well as form of a magnet can be reviewed with our our magnetic calculator.

Orders submitted before 14:00 will be dispatched today!

💡 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!

Technical data - 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

Material specification

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: 210385-2026

Measurement Calculator

Magnet pull force

Force in kg

Force (N)

lbs

Magnetic Induction

Induction (T)

Input a value into any field, to see all other values change automatically.

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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. Model UMP 135x40 [M10+M12] GW F600 Lina / N38 offers an optimal weight-to-pull force ratio, which is important for repeated throwing. The choice depends on whether you plan to throw from the shore (double-sided) or from a bridge (single-sided).

Double-sided holders (Two-Side) have two active magnetic surfaces and two mounting holes. 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.

The magnet is glued into a solid steel cup and sealed with epoxy resin, protecting it from water. 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. In the package, you will find everything needed: strong rope (e.g., 20m), gloves, and hardware. Using thread glue is crucial to not lose the magnet in silt.

The capacity given in the name (e.g., 680.00 kg) is the maximum value measured in laboratory conditions. The magnet may slide on round elements (bicycle frame) due to the small contact area. 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. Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.

Unlike other brands, Dhit does not cut corners on components, which translates into a better results during every trip to the water.

The GOLD series utilize a robust construction that acts as a real armor for the magnetic core.

It is worth remembering that the same mount used by the lateral point often has as little as 40 kg of power instead of the declared 200 kg. The Dhit brand focuses on full transparency by stating the actual capabilities of the gear, so you avoid disappointment during real field work.

{In contrast to competitors importing from China, Dhit provides expert advice and instant warranty help, which is crucial after the transaction. Don't risk it with random brands, stick with proven gear that ensures the satisfaction of searcher.

Strengths as well as weaknesses of rare earth magnets.

Advantages

Besides their high retention, neodymium magnets are valued for these benefits:

They do not lose power, even after nearly ten years – the reduction in power is only ~1% (according to tests),
They feature excellent resistance to weakening of magnetic properties due to external magnetic sources,
Thanks to the metallic finish, the plating of nickel, gold, or silver gives an professional appearance,
The surface of neodymium magnets generates a strong magnetic field – this is a distinguishing feature,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
Thanks to the option of flexible forming and adaptation to specialized projects, neodymium magnets can be produced in a variety of shapes and sizes, which expands the range of possible applications,
Huge importance in high-tech industry – they are commonly used in data components, electric drive systems, advanced medical instruments, as well as other advanced devices.
Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which makes them useful in compact constructions

Disadvantages

Drawbacks and weaknesses of neodymium magnets: application proposals

Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only secures them against impacts but also increases their durability
NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
They rust in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
We suggest cover - magnetic holder, due to difficulties in realizing threads inside the magnet and complex shapes.
Potential hazard related to microscopic parts of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small elements of these products can disrupt the diagnostic process medical when they are in the body.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Lifting parameters

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

The load parameter shown concerns the maximum value, recorded under optimal environment, meaning:

using a sheet made of high-permeability steel, serving as a magnetic yoke
possessing a thickness of minimum 10 mm to avoid saturation
with an polished contact surface
under conditions of ideal adhesion (surface-to-surface)
for force acting at a right angle (pull-off, not shear)
in temp. approx. 20°C

Lifting capacity in real conditions – factors

It is worth knowing that the application force will differ subject to elements below, starting with the most relevant:

Clearance – the presence of any layer (paint, dirt, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
Load vector – maximum parameter is obtained only during perpendicular pulling. The force required to slide of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
Smoothness – full contact is obtained only on polished steel. Any scratches and bumps reduce the real contact area, reducing force.
Thermal factor – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the holding force is lower. In addition, even a small distance between the magnet and the plate reduces the lifting capacity.

Warnings

Machining danger

Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.

Respect the power

Use magnets with awareness. Their huge power can shock even experienced users. Be vigilant and do not underestimate their power.

Crushing risk

Mind your fingers. Two powerful magnets will snap together immediately with a force of massive weight, destroying everything in their path. Exercise extreme caution!

Life threat

People with a pacemaker must maintain an large gap from magnets. The magnetism can stop the operation of the implant.

Allergic reactions

Certain individuals have a contact allergy to nickel, which is the standard coating for NdFeB magnets. Extended handling may cause an allergic reaction. We recommend wear safety gloves.

Product not for children

Only for adults. Tiny parts pose a choking risk, causing severe trauma. Keep out of reach of children and animals.

Protect data

Data protection: Strong magnets can damage data carriers and delicate electronics (heart implants, medical aids, mechanical watches).

Protective goggles

Beware of splinters. Magnets can fracture upon uncontrolled impact, launching shards into the air. Wear goggles.

Compass and GPS

Be aware: neodymium magnets produce a field that interferes with sensitive sensors. Maintain a safe distance from your mobile, device, and navigation systems.

Heat warning

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

Important! Need more info? Check our post: Are neodymium magnets dangerous?

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

Technical data - 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

Material specification

Environmental data

Magnet pull force

Magnetic Induction

Check out more deals

UMC 25x6/4x8 / N38 - cylindrical magnetic holder

MPL 25x10x5 / N38 - lamellar magnet

BM 320x180x70 [4x M8] - magnetic beam

RM R6 GOLF - 13000 Gs / N52 - magnetic distributor

Strengths as well as weaknesses of rare earth magnets.

Advantages

Disadvantages

Lifting parameters

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

Lifting capacity in real conditions – factors

Warnings

Machining danger

Respect the power

Crushing risk

Life threat

Allergic reactions

Product not for children

Protect data

Protective goggles

Compass and GPS

Heat warning

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C