Product available Ships today (order by 14:00)

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: 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%]

check specifications »

649.99 ZŁ with VAT / pcs + price for transport

528.45 ZŁ net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Do you have purchase concerns?

Call us +48 22 499 98 98 or contact us through request form through our site.
Specifications and structure of magnetic components can be checked on our force calculator.

Same-day shipping for orders placed before 14:00.

💡 Guide: How to choose a decent magnet and not get ripped off?

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 specification - 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 and environmental data

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%

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: 210385-2025

Quick Unit Converter

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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. 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 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. 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.

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.

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. 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.

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.

It is the smartest investment because for the same money, you buy a premium mount that will last for many seasons than generic imports.

Most competitor mounts have thin casings that crack during the any strong impact against concrete or rocks.

You should know that the same magnet pulled by the side hook often has only 40 kg of power instead of the declared 200 kg. Crucially, in the entire internet, it is hard to find videos demonstrating the real side-pull force of other brands on the lateral attachment.

{In contrast to competitors importing from China, Dhit provides expert advice and real service assistance, which is crucial after the transaction. Instead of risking with random brands, it is better to choose proven gear that cares about the happiness of every user.

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.

Strengths

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

They have stable power, and over around ten years their attraction force decreases symbolically – ~1% (in testing),
Magnets effectively resist against loss of magnetization caused by ambient magnetic noise,
In other words, due to the shiny finish of gold, the element looks attractive,
Magnetic induction on the working layer of the magnet is very high,
Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
Due to the potential of free molding and customization to specialized solutions, NdFeB magnets can be modeled in a variety of shapes and sizes, which increases their versatility,
Versatile presence in modern technologies – they are used in magnetic memories, drive modules, advanced medical instruments, and other advanced devices.
Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Disadvantages of neodymium magnets:

They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
NdFeB magnets lose strength 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 extremely resistant to heat
When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
We recommend casing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complex forms.
Potential hazard to health – tiny shards of magnets are risky, if swallowed, which is particularly important in the context of child safety. Furthermore, small elements of these devices are able to be problematic in diagnostics medical when they are in the body.
Due to neodymium price, their price exceeds standard values,

Holding force characteristics

Maximum lifting capacity of the magnet – what contributes to it?

Breakaway force is the result of a measurement for ideal contact conditions, including:

on a block made of structural steel, effectively closing the magnetic field
possessing a thickness of minimum 10 mm to avoid saturation
characterized by smoothness
with total lack of distance (no paint)
for force acting at a right angle (pull-off, not shear)
at ambient temperature room level

Practical lifting capacity: influencing factors

In real-world applications, the actual lifting capacity is determined by many variables, listed from most significant:

Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
Angle of force application – maximum parameter is available only during perpendicular pulling. The shear force of the magnet along the plate is typically many times smaller (approx. 1/5 of the lifting capacity).
Plate thickness – too thin sheet causes magnetic saturation, causing part of the flux to be wasted into the air.
Plate material – mild steel attracts best. Alloy steels decrease magnetic permeability and holding force.
Plate texture – smooth surfaces guarantee perfect abutment, which improves force. Rough surfaces weaken the grip.
Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, however under shearing force the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet’s surface and the plate lowers the holding force.

H&S for magnets

Nickel allergy

A percentage of the population experience a hypersensitivity to Ni, which is the common plating for neodymium magnets. Prolonged contact might lead to an allergic reaction. We suggest wear safety gloves.

Magnetic interference

Be aware: rare earth magnets produce a field that confuses precision electronics. Keep a separation from your mobile, tablet, and GPS.

Eye protection

Despite metallic appearance, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Powerful field

Handle magnets with awareness. Their powerful strength can shock even experienced users. Be vigilant and respect their force.

Danger to the youngest

These products are not toys. Eating a few magnets may result in them pinching intestinal walls, which poses a critical condition and requires immediate surgery.

Crushing risk

Large magnets can break fingers in a fraction of a second. Do not place your hand between two strong magnets.

Dust is flammable

Powder generated during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Permanent damage

Monitor thermal conditions. Heating the magnet to high heat will permanently weaken its magnetic structure and strength.

Protect data

Intense magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Stay away of at least 10 cm.

Danger to pacemakers

People with a ICD should keep an absolute distance from magnets. The magnetic field can stop the operation of the life-saving device.

Attention! Looking for details? Check our post: Are neodymium magnets dangerous?

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

Technical specification - 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

Ecology and recycling (GPSR)

Force (pull)

Magnetic Field

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MP 14x8/4x3 / N38 - ring magnet

UMGW 32x18x8 [M6] GW / N38 - magnetic holder internal thread

SM 25x200 [2xM8] / N52 - magnetic separator

SMZR 32x250 / N52 - magnetic separator with handle

Strengths as well as weaknesses of Nd2Fe14B magnets.

Strengths

Weaknesses

Holding force characteristics

Maximum lifting capacity of the magnet – what contributes to it?

Practical lifting capacity: influencing factors

H&S for magnets

Nickel allergy

Magnetic interference

Eye protection

Powerful field

Danger to the youngest

Crushing risk

Dust is flammable

Permanent damage

Protect data

Danger to pacemakers

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Strengths as well as weaknesses of Nd₂Fe₁₄B magnets.