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UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

search holder

Catalog no 210433

GTIN/EAN: 5906301814085

5.00

Diameter Ø

75 mm [±1 mm]

Height

25 mm [±1 mm]

Weight

900 g

Load capacity

310.00 kg / 3040.06 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 8 000 Gauss [±5%]

view parameters »

200.00 ZŁ with VAT / pcs + price for transport

162.60 ZŁ net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety
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Call us +48 22 499 98 98 alternatively send us a note using request form the contact page.
Parameters as well as appearance of magnets can be verified on our force 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 of the product - UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

Specification / characteristics - UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

properties
properties values
Cat. no. 210433
GTIN/EAN 5906301814085
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 75 mm [±1 mm]
Height 25 mm [±1 mm]
Weight 900 g
Load capacity ~ ? 310.00 kg / 3040.06 N
Coating [NiCuNi] Nickel
Series GOLD
Holder Type 2 sided
Material Type Structural steel S235 (ferrous)
Magnetic Flux ~ 8 000 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 N42

Specification / characteristics UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder
properties values units
remenance Br [min. - max.] ? 12.9-13.2 kGs
remenance Br [min. - max.] ? 1290-1320 mT
coercivity bHc ? 10.8-12.0 kOe
coercivity bHc ? 860-955 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 40-42 BH max MGOe
energy density [min. - max.] ? 318-334 BH max KJ/m
max. temperature ? ≤ 80 °C

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°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: 210433-2026
Measurement Calculator
Force (pull)
Magnetic Induction
Insert a value in one of the inputs, and the remaining units will update on the fly.

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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 310.00 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.
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. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.
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. We recommend always securing the thread with glue or tightening the eyelet firmly before first use.
This force applies to perfect adherence with the entire surface to a smooth, clean steel plate with a min. thickness of 20mm. Dirt, rust, paint, and algae create a distance that weakens the magnet by even 70-80%. A large power reserve is essential in real search conditions.
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.
It is the best value because for the same money, you obtain professional-grade equipment 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.
Many sellers use a trick by advertising the pull force measured exclusively on the vertical mount. Crucially, in the web, it is hard to find videos demonstrating the actual strength of competitor products on the side hook.
{In contrast to anonymous sellers, Dhit provides expert advice and instant service assistance, which gives peace of mind after the transaction. Instead of risking with random brands, stick with the market leader that cares about the satisfaction of every user.

Advantages and disadvantages of Nd2Fe14B magnets.

Strengths

Besides their durability, neodymium magnets are valued for these benefits:
  • Their strength remains stable, and after approximately 10 years it drops only by ~1% (theoretically),
  • Neodymium magnets remain remarkably resistant to magnetic field loss caused by external interference,
  • The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to look better,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Possibility of custom creating as well as optimizing to complex applications,
  • Wide application in innovative solutions – they are utilized in mass storage devices, electric motors, diagnostic systems, and other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Disadvantages of neodymium magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • When exposed to high temperature, neodymium magnets experience a drop in strength. 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 corrode. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in realizing threads and complex forms in magnets, we propose using casing - magnetic mechanism.
  • Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which becomes key 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 a significant factor to consider compared to ceramic magnets, especially in budget applications

Holding force characteristics

Magnetic strength at its maximum – what affects it?

Magnet power is the result of a measurement for optimal configuration, assuming:
  • on a plate made of mild steel, optimally conducting the magnetic field
  • with a cross-section of at least 10 mm
  • with an polished touching surface
  • without any insulating layer between the magnet and steel
  • during pulling in a direction vertical to the plane
  • at ambient temperature room level

Determinants of lifting force in real conditions

During everyday use, the real power results from many variables, ranked from crucial:
  • Distance – the presence of foreign body (paint, tape, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet holds much less (typically approx. 20-30% of maximum force).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Plate material – mild steel gives the best results. Alloy admixtures reduce magnetic permeability and lifting capacity.
  • Smoothness – full contact is possible only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost gain strength (up to a certain limit).

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. Moreover, even a small distance between the magnet and the plate reduces the load capacity.

Warnings
Eye protection

NdFeB magnets are sintered ceramics, which means they are fragile like glass. Impact of two magnets leads to them breaking into shards.

This is not a toy

NdFeB magnets are not intended for children. Accidental ingestion of several magnets can lead to them attracting across intestines, which constitutes a critical condition and necessitates immediate surgery.

Mechanical processing

Drilling and cutting of NdFeB material carries a risk of fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Danger to pacemakers

For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or request help to work with the magnets.

Maximum temperature

Monitor thermal conditions. Exposing the magnet to high heat will ruin its magnetic structure and strength.

Phone sensors

Navigation devices and mobile phones are extremely susceptible to magnetism. Close proximity with a powerful NdFeB magnet can ruin the internal compass in your phone.

Magnetic media

Device Safety: Strong magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).

Bodily injuries

Watch your fingers. Two large magnets will join immediately with a force of massive weight, destroying anything in their path. Be careful!

Warning for allergy sufferers

It is widely known that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, refrain from direct skin contact or select encased magnets.

Handling guide

Handle with care. Rare earth magnets act from a long distance and connect with massive power, often quicker than you can move away.

Safety First! Want to know more? Read our article: Are neodymium magnets dangerous?