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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%]

check 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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Give us a call +48 22 499 98 98 otherwise get in touch using contact form through our site.
Parameters and structure of a magnet can be calculated on our modular calculator.

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 - 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 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%
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: 210433-2026
Magnet Unit Converter
Pulling force
Field Strength
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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. The choice depends on whether you plan to throw from the shore (double-sided) or from a bridge (single-sided).
The 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. Side mounting is ideal for throwing from the shore, as the magnet drags flat along the bottom. The double-sided version increases search efficiency by 100%.
Our holders have a thick steel housing covered with an anti-corrosion layer (chrome, nickel, zinc). The housing significantly increases lifespan but does not make the magnet completely indestructible. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.
Most of our starter kits are complete and ready to use. We often add thread glue to secure the eyelet against unscrewing in water. Using thread glue is crucial to not lose the magnet in silt.
It is a technical parameter defining perpendicular break force, not the weight of an object in water. 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.
Searches are allowed as long as you do not interfere with archaeological sites or search for weapons. We recommend familiarizing yourself with current local regulations and heritage protection laws.
Unlike other brands, Dhit does not cut corners on materials, which translates into a better results during every trip to the water.
The unique way of gluing and seating the magnet in the protective cup builds a unified structure that absorbs impacts while fishing on rough surfaces.
Many sellers employ a tactic by advertising the pull force tested exclusively on the top hook. Interestingly, in the web, there are virtually no recordings testing the actual strength of competitor products on the lateral attachment.
{In contrast to competitors importing from China, Dhit provides expert advice and instant warranty help, which gives peace of mind after the purchase. Instead of risking with random brands, it is better to choose proven gear that cares about the happiness of every user.

Strengths and weaknesses of Nd2Fe14B magnets.

Advantages

In addition to their pulling strength, neodymium magnets provide the following advantages:
  • Their power is maintained, and after around 10 years it drops only by ~1% (theoretically),
  • They do not lose their magnetic properties even under close interference source,
  • Thanks to the metallic finish, the layer of nickel, gold, or silver-plated gives an visually attractive appearance,
  • Magnets possess exceptionally strong magnetic induction on the active area,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Thanks to modularity in designing and the capacity to adapt to unusual requirements,
  • Significant place in modern technologies – they are used in computer drives, motor assemblies, diagnostic systems, as well as technologically advanced constructions.
  • Thanks to concentrated force, small magnets offer high operating force, with minimal size,

Weaknesses

Problematic aspects of neodymium magnets: weaknesses and usage proposals
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting 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 strength 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 those in rubber or plastics, which secure oxidation as well as corrosion.
  • We recommend casing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated shapes.
  • Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child safety. Furthermore, tiny parts of these devices are able to disrupt the diagnostic process medical after entering the body.
  • Due to neodymium price, their price is higher than average,

Holding force characteristics

Maximum magnetic pulling force – what it depends on?

The lifting capacity listed is a measurement result performed under specific, ideal conditions:
  • using a sheet made of mild steel, serving as a magnetic yoke
  • with a cross-section minimum 10 mm
  • characterized by smoothness
  • under conditions of gap-free contact (surface-to-surface)
  • for force acting at a right angle (in the magnet axis)
  • at conditions approx. 20°C

Key elements affecting lifting force

Effective lifting capacity is affected by working environment parameters, mainly (from most important):
  • Distance (betwixt the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to varnish, rust or debris).
  • Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
  • Plate thickness – too thin plate does not accept the full field, causing part of the power to be escaped to the other side.
  • Plate material – low-carbon steel attracts best. Alloy steels reduce magnetic permeability and lifting capacity.
  • Base smoothness – the more even the surface, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.

Safe handling of NdFeB magnets
Phone sensors

Remember: neodymium magnets produce a field that interferes with sensitive sensors. Maintain a separation from your phone, device, and navigation systems.

Machining danger

Powder produced during grinding of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Material brittleness

Watch out for shards. Magnets can explode upon uncontrolled impact, launching shards into the air. Wear goggles.

Conscious usage

Be careful. Neodymium magnets act from a long distance and snap with huge force, often quicker than you can move away.

Electronic devices

Device Safety: Strong magnets can damage payment cards and delicate electronics (heart implants, hearing aids, timepieces).

Hand protection

Risk of injury: The attraction force is so great that it can result in blood blisters, crushing, and even bone fractures. Protective gloves are recommended.

Warning for allergy sufferers

Allergy Notice: The nickel-copper-nickel coating contains nickel. If an allergic reaction appears, immediately stop working with magnets and wear gloves.

Heat sensitivity

Do not overheat. Neodymium magnets are sensitive to temperature. If you need resistance above 80°C, ask us about HT versions (H, SH, UH).

Warning for heart patients

Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Product not for children

Absolutely keep magnets away from children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are very dangerous.

Security! Details about hazards in the article: Magnet Safety Guide.