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UMP 65x45 [M8] GW - search holder

search holder

Catalog no 210259

GTIN/EAN: 5906301813927

Diameter Ø

65 mm [±1 mm]

Height

45 mm [±1 mm]

Weight

1150 g

Load capacity

230.00 kg / 2255.53 N

Coating

[NiCuNi] Nickel

view parameters »

150.00 ZŁ with VAT / pcs + price for transport

121.95 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
Not sure which magnet to buy?

Pick up the phone and ask +48 22 499 98 98 otherwise drop us a message through contact form the contact section.
Force and appearance of magnetic components can be tested on our modular calculator.

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

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

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!

Physical properties - UMP 65x45 [M8] GW - search holder

Specification / characteristics - UMP 65x45 [M8] GW - search holder

properties
properties values
Cat. no. 210259
GTIN/EAN 5906301813927
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 65 mm [±1 mm]
Height 45 mm [±1 mm]
Weight 1150 g
Load capacity ~ ? 230.00 kg / 2255.53 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

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%
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: 210259-2026
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Pulling force
Magnetic Field
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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. Model UMP 65x45 [M8] GW offers an optimal weight-to-pull force ratio, which is important for repeated throwing. 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). 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. 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). We often add thread glue to secure the eyelet against unscrewing in water. 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. 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.
If you find a dangerous object (unexploded ordnance) or an antique, you have a legal obligation to report it to appropriate services (Police, conservator). 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 budget alternatives.
Dhit GOLD mounts feature heavy-duty, thick-walled steel that provides a true shield for the brittle neodymium.
You should know that the same mount used by the side hook often has only a fraction of strength instead of the declared 200 kg. The Dhit brand focuses on honest data by providing the real parameters of the magnet, so you can be sure during real field work.
{By choosing Dhit, you support Polish engineering that knows the specifics of our waters. Every product is individually inspected before shipping, which ensures that you receive equipment of the defect-free.

Pros and cons of neodymium magnets.

Pros

Besides their high retention, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
  • They show high resistance to demagnetization induced by external disturbances,
  • Thanks to the reflective finish, the plating of Ni-Cu-Ni, gold-plated, or silver gives an clean appearance,
  • Neodymium magnets achieve maximum magnetic induction on a their surface, which increases force concentration,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to freedom in shaping and the capacity to customize to complex applications,
  • Wide application in future technologies – they are used in HDD drives, electric drive systems, precision medical tools, as well as complex engineering applications.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Cons

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a steel housing, which not only secures them against impacts but also raises their 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
  • They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in creating nuts and complex forms in magnets, we propose using cover - magnetic holder.
  • Possible danger to health – tiny shards of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small elements of these devices are able to disrupt the diagnostic process medical after entering the body.
  • Due to expensive raw materials, their price exceeds standard values,

Lifting parameters

Maximum holding power of the magnet – what it depends on?

Information about lifting capacity is the result of a measurement for ideal contact conditions, including:
  • with the use of a yoke made of special test steel, ensuring maximum field concentration
  • possessing a thickness of minimum 10 mm to avoid saturation
  • characterized by lack of roughness
  • without the slightest air gap between the magnet and steel
  • under perpendicular force direction (90-degree angle)
  • at conditions approx. 20°C

Impact of factors on magnetic holding capacity in practice

In practice, the actual holding force depends on a number of factors, presented from the most important:
  • Air gap (betwixt the magnet and the metal), since even a microscopic distance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Steel thickness – too thin sheet causes magnetic saturation, causing part of the power to be escaped into the air.
  • Material type – ideal substrate is pure iron steel. Cast iron may generate lower lifting capacity.
  • Plate texture – ground elements ensure maximum contact, which improves force. Uneven metal weaken the grip.
  • Temperature – temperature increase causes a temporary drop of force. Check the thermal limit for a given model.

Lifting capacity was measured using a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under attempts to slide the magnet the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate lowers the load capacity.

Safe handling of neodymium magnets
Pacemakers

Warning for patients: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or request help to handle the magnets.

Serious injuries

Mind your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying anything in their path. Be careful!

Cards and drives

Very strong magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.

Flammability

Machining of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

GPS and phone interference

Remember: neodymium magnets produce a field that interferes with sensitive sensors. Keep a safe distance from your mobile, device, and GPS.

Metal Allergy

Certain individuals have a hypersensitivity to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact may cause dermatitis. It is best to use safety gloves.

Shattering risk

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Wear goggles.

Product not for children

Neodymium magnets are not intended for children. Swallowing a few magnets may result in them attracting across intestines, which constitutes a critical condition and requires immediate surgery.

Power loss in heat

Do not overheat. NdFeB magnets are sensitive to heat. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).

Conscious usage

Use magnets with awareness. Their immense force can shock even experienced users. Stay alert and respect their force.

Warning! Need more info? Read our article: Are neodymium magnets dangerous?