← previous
next →
Product available Ships today (order by 14:00)

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

search holder

Catalog no 210433

GTIN/EAN: 5906301814085

5.00
Load capacity 310.00 kg / 3040.06 N
Diameter Ø
75 mm [±1 mm]
Height
25 mm [±1 mm]
Weight
900 g
Coating
[NiCuNi] Nickel
Magnetic Flux
~ 8 000 Gauss [±5%]
see technical specifications »

200.00 zł with VAT / pcs + price for transport

162.60 zł net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
162.60 ZŁ
200.00 ZŁ
price from 10 pcs
152.84 ZŁ
188.00 ZŁ
price from 20 pcs
143.09 ZŁ
176.00 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Want to negotiate?

Call us +48 888 99 98 98 if you prefer let us know using form the contact page.
Weight and shape of magnetic components can be verified on our online calculation tool.

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!

Product card - 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

Elemental analysis

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

Force (pull)

Field Strength

Type a value into a field, and all other values change instantly.

See more proposals

MT 50x1.5x30000 - magnetic tape
Product available Ships today (order by 14:00)

MT 50x1.5x30000 - magnetic tape

258.30 zł brutto / pcs
SM 25x175 [2xM8] / N42 - magnetic separator
Product available Ships today (order by 14:00)

SM 25x175 [2xM8] / N42 - magnetic separator

504.30 zł brutto / pcs
MPL 30x20x4 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 30x20x4 / N38 - lamellar magnet

10.23 zł brutto / pcs
SM 25x400 [2xM8] / N42 - magnetic separator
Product available Ships today (order by 14:00)

SM 25x400 [2xM8] / N42 - magnetic separator

1131.60 zł brutto / pcs
The best choice are magnets in thick, chrome-plated housings dedicated to water applications. It is equipment that can handle pulling heavy and silted objects from the river bottom. 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. The side eyelet ensures the magnet doesn't stand sideways or "on edge" during pulling. 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). 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.
Check the product title and description to see if you are buying just the magnet or the XL set. 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., 310.00 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.
Possessing and using a neodymium magnet to clean the bottom is generally legal, provided you are not searching for artifacts protected by law. Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.
By choosing the Dhit brand, you get a product of a significantly higher standard and true magnetic power for the average cost.
A special technology of gluing and seating the magnet in the protective cup creates a solid structure that absorbs impacts while fishing on difficult, rocky bottoms.
You should know that the same magnet used by the lateral point can actually show as little as 40 kg of power instead of the declared 200 kg. The Dhit brand focuses on honest data by providing the real parameters of the gear, so you avoid disappointment during real field work.
{By choosing Dhit, you support a local market leader that perfectly understands the conditions of local rivers and lakes. Don't risk it with random brands, it is better to choose proven gear that ensures the happiness of searcher.

Pros and cons of Nd2Fe14B magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over more than ten years their performance decreases symbolically – ~1% (according to theory),
  • Magnets very well protect themselves against demagnetization caused by foreign field sources,
  • By applying a shiny layer of gold, the element has an professional look,
  • Magnets exhibit very high magnetic induction on the outer side,
  • 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...
  • Thanks to versatility in constructing and the capacity to customize to client solutions,
  • Wide application in electronics industry – they serve a role in magnetic memories, electric motors, medical equipment, also complex engineering applications.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in power. 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
  • When exposed to humidity, magnets start to 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 cover - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated forms.
  • Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small elements of these magnets are able to complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum lifting capacity of the magnet – what it depends on?

Breakaway force was defined for the most favorable conditions, including:
  • with the application of a yoke made of low-carbon steel, guaranteeing full magnetic saturation
  • possessing a thickness of minimum 10 mm to ensure full flux closure
  • with a plane cleaned and smooth
  • without any air gap between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • in stable room temperature

Magnet lifting force in use – key factors

Holding efficiency impacted by specific conditions, mainly (from most important):
  • Gap (between the magnet and the metal), as even a very small distance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to varnish, corrosion or dirt).
  • Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Steel thickness – insufficiently thick sheet does not close the flux, causing part of the flux to be wasted into the air.
  • Material composition – not every steel attracts identically. High carbon content worsen the attraction effect.
  • Base smoothness – the more even the plate, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
  • Thermal environment – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity was assessed by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, however under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Safe handling of neodymium magnets
Magnets are brittle

Neodymium magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets will cause them cracking into shards.

Dust explosion hazard

Fire hazard: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.

Life threat

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Bodily injuries

Pinching hazard: The pulling power is so immense that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.

Maximum temperature

Keep cool. Neodymium magnets are sensitive to heat. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).

Protect data

Do not bring magnets close to a purse, laptop, or TV. The magnetism can destroy these devices and wipe information from cards.

Product not for children

Always keep magnets away from children. Choking hazard is significant, and the consequences of magnets connecting inside the body are very dangerous.

Powerful field

Handle with care. Neodymium magnets act from a long distance and snap with huge force, often faster than you can move away.

Warning for allergy sufferers

A percentage of the population have a sensitization to Ni, which is the typical protective layer for NdFeB magnets. Extended handling might lead to an allergic reaction. We strongly advise wear safety gloves.

Compass and GPS

GPS units and mobile phones are highly sensitive to magnetism. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Caution! Learn more about hazards in the article: Safety of working with magnets.