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UMP 65x45 [M8] GW - search holder

search holder

Catalog no 210259

GTIN/EAN: 5906301813927

Load capacity 230.00 kg / 2255.53 N
Diameter Ø
65 mm [±1 mm]
Height
45 mm [±1 mm]
Weight
1150 g
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

product specifications »

121.95 zł net / pcs

150.00 zł with VAT (23% VAT) / pcs

price for transport

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Frequently asked questions

How strong a magnet do I need for magnet fishing?
Our search magnets are rated between 32 kg and 680 kg of pull force. The rating is measured as a straight, perpendicular pull on thick, clean steel — in a river you almost never pull that way, so treat it as a figure for comparing models rather than a promise. For a first magnet, mid-range models around 300 kg are easier to handle than the heaviest ones, which are simply hard to lift once they grab a submerged object.
What rope and shackle should I pair with the magnet?
Match the whole chain, not just the magnet. Our ø10 mm rope is rated at 1592 kg and the M10 shackle at 320 kg, so with a 310 kg magnet the shackle is the limiting part. Whatever you buy, check the rating of every component separately and take the lowest one as the rating of the set. The knot at the eye is usually weaker than the rope itself.
What is the difference between a single-sided and a double-sided fishing magnet?
A single-sided magnet holds on one face only, so it has to land the right way round. A double-sided one grabs from either face, which matters when you throw it into moving water and cannot control how it lands. The trade-off is weight and price for the same nominal pull force — the F200 GOLD DUAL, for instance, is rated at 601 kg against 310 kg for the single-sided F200 GOLD.
Does the pull force rating apply underwater?
Water itself is not the problem — it is not magnetic and barely changes the force. What changes it is everything else: silt and rust between the magnet and the find, a curved or thin surface instead of a flat plate, and a pull that comes at an angle rather than straight off. Expect a fraction of the catalogue figure in real conditions, and choose the mounting point and coating with that in mind.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

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💡 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 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 310 °C
Curie Temperature TF 590 °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: 210259-2026
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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 230.00 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.
Double-sided holders (Two-Side) have two active magnetic surfaces and two mounting holes. Side mounting is ideal for throwing from the shore, as the magnet drags flat along the bottom. 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.
Most of our starter kits are complete and ready to use. 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. 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.
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.
Unlike other brands, Dhit uses the highest quality components, which translates into a clear advantage during treasure hunting.
A special technology of gluing and seating the magnet in the Dhit housing creates a solid structure that absorbs impacts while working on rough surfaces.
It is worth remembering that the identical mount pulled by the lateral point often has only a fraction of strength instead of the declared 200 kg. The Dhit brand focuses on full transparency by providing the real parameters of the gear, so you avoid disappointment during treasure hunting.
{Unlike competitors importing from China, Dhit provides expert advice and real service assistance, which is crucial after the transaction. Every mount is checked before delivery, which ensures that you receive equipment of the defect-free.

Strengths and weaknesses of neodymium magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (based on calculations),
  • They do not lose their magnetic properties even under strong external field,
  • A magnet with a smooth gold surface has better aesthetics,
  • Magnetic induction on the top side of the magnet remains strong,
  • 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 detailed creating and adjusting to individual conditions,
  • Huge importance in future technologies – they find application in data components, motor assemblies, medical devices, and industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in miniature devices

Cons

Disadvantages of neodymium magnets:
  • At very strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (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
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We recommend a housing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complex shapes.
  • Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these devices can be problematic in diagnostics medical after entering the body.
  • With budget limitations the cost of neodymium magnets can be a barrier,

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

Breakaway force is the result of a measurement for the most favorable conditions, taking into account:
  • with the contact of a sheet made of special test steel, guaranteeing maximum field concentration
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • characterized by even structure
  • with zero gap (no impurities)
  • for force acting at a right angle (pull-off, not shear)
  • at ambient temperature room level

Lifting capacity in practice – influencing factors

During everyday use, the actual holding force depends on several key aspects, presented from crucial:
  • Distance – the presence of foreign body (paint, tape, air) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
  • Angle of force application – highest force is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the surface is typically several times lower (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Steel type – mild steel gives the best results. Higher carbon content reduce magnetic properties and holding force.
  • Surface condition – ground elements ensure maximum contact, which increases field saturation. Uneven metal reduce efficiency.
  • Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was assessed with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under parallel forces the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet’s surface and the plate reduces the holding force.

Precautions when working with neodymium magnets
Electronic hazard

Powerful magnetic fields can erase data on payment cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.

Flammability

Mechanical processing of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Respect the power

Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Hand protection

Big blocks can smash fingers in a fraction of a second. Do not put your hand between two strong magnets.

Precision electronics

A strong magnetic field disrupts the functioning of compasses in smartphones and navigation systems. Do not bring magnets close to a device to avoid breaking the sensors.

Adults only

Product intended for adults. Tiny parts can be swallowed, leading to serious injuries. Store away from kids and pets.

Shattering risk

Despite the nickel coating, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Operating temperature

Avoid heat. Neodymium magnets are susceptible to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).

Warning for heart patients

Medical warning: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Allergic reactions

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, cease working with magnets and wear gloves.

Warning! Need more info? Check our post: Are neodymium magnets dangerous?