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UMP 29x10 [M5] GW - search holder

search holder

Catalog no 210230

GTIN/EAN: 5906301813903

Load capacity 32.00 kg / 313.81 N
Diameter Ø
29 mm [±1 mm]
Height
10 mm [±1 mm]
Weight
0.1 g
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

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8.54 zł net / pcs

10.50 zł with VAT (23% VAT) / pcs

price for transport

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Gross
price from 1 pcs
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price from 150 pcs
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price from 300 pcs
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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.

Order by 14:00 and we’ll ship 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!

Detailed specification - UMP 29x10 [M5] GW - search holder

Specification / characteristics - UMP 29x10 [M5] GW - search holder

properties
properties values
Cat. no. 210230
GTIN/EAN 5906301813903
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 29 mm [±1 mm]
Height 10 mm [±1 mm]
Weight 0.1 g
Load capacity ~ ? 32.00 kg / 313.81 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
Engineering data and GPSR

Chemical composition

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: 210230-2026
Quick Unit Converter

Force (pull)

Field Strength

Just complete one field, to let the calculator fill in the rest for you.

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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 32.00 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).
Double-sided holders (Two-Side) have two active magnetic surfaces and two mounting holes. 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.
Our holders have a thick steel housing covered with an anti-corrosion layer (chrome, nickel, zinc). Despite solid construction, neodymium is a brittle material and can chip upon very strong impact (e.g., against concrete). 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. 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. 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. We recommend familiarizing yourself with current local regulations and heritage protection laws.
By selecting the Dhit brand, you receive a higher quality standard and true magnetic power for the same market price.
Most competitor mounts have thin casings that deform during the any strong impact against concrete or rocks.
You should know that the identical magnet used by the lateral point often has only a fraction of strength instead of the declared 200 kg. Crucially, in the entire internet, there are virtually no videos demonstrating the actual strength of competitor products on the lateral attachment.
{In contrast to anonymous sellers, Dhit provides full support and instant service assistance, which is crucial after the transaction. Every product is checked before delivery, which ensures that you the set will be of the defect-free.

Advantages as well as disadvantages of rare earth magnets.

Strengths

Besides their remarkable strength, neodymium magnets offer the following advantages:
  • They do not lose magnetism, even over approximately ten years – the reduction in strength is only ~1% (theoretically),
  • They are noted for resistance to demagnetization induced by external field influence,
  • Thanks to the shiny finish, the surface of nickel, gold-plated, or silver gives an visually attractive appearance,
  • The surface of neodymium magnets generates a unique magnetic field – this is a distinguishing feature,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures approaching 230°C and above...
  • Thanks to the option of flexible forming and adaptation to specialized projects, NdFeB magnets can be modeled in a wide range of geometric configurations, which makes them more universal,
  • Fundamental importance in modern industrial fields – they are commonly used in magnetic memories, electromotive mechanisms, medical devices, also complex engineering applications.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Cons

Problematic aspects of neodymium magnets and proposals for their use:
  • At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength 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 rust. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in creating threads and complicated shapes in magnets, we propose using a housing - magnetic mount.
  • Potential hazard related to microscopic parts of magnets pose a threat, if swallowed, which becomes key in the context of child health protection. Additionally, small components of these magnets can complicate diagnosis medical in case of swallowing.
  • Due to complex production process, their price is higher than average,

Lifting parameters

Maximum magnetic pulling force – what it depends on?

Breakaway force was determined for the most favorable conditions, taking into account:
  • on a block made of structural steel, optimally conducting the magnetic flux
  • with a cross-section minimum 10 mm
  • with a surface cleaned and smooth
  • under conditions of gap-free contact (surface-to-surface)
  • during pulling in a direction vertical to the plane
  • at conditions approx. 20°C

Lifting capacity in real conditions – factors

In real-world applications, the actual holding force is determined by several key aspects, presented from crucial:
  • Gap between magnet and steel – every millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Load vector – maximum parameter is reached only during pulling at a 90° angle. The force required to slide of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
  • Base massiveness – insufficiently thick plate does not close the flux, causing part of the power to be escaped into the air.
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may attract less.
  • Surface quality – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Thermal conditions – NdFeB sinters have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate decreases the load capacity.

Safe handling of neodymium magnets
Danger to pacemakers

Warning for patients: Powerful magnets affect electronics. Maintain at least 30 cm distance or request help to work with the magnets.

Protective goggles

Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Avoid contact if allergic

Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation appears, immediately stop working with magnets and wear gloves.

Keep away from children

Always store magnets out of reach of children. Choking hazard is high, and the effects of magnets connecting inside the body are tragic.

Safe operation

Be careful. Neodymium magnets act from a distance and connect with massive power, often faster than you can react.

Impact on smartphones

A strong magnetic field negatively affects the functioning of magnetometers in smartphones and GPS navigation. Maintain magnets close to a device to avoid breaking the sensors.

Bone fractures

Large magnets can smash fingers instantly. Never put your hand between two strong magnets.

Safe distance

Do not bring magnets close to a wallet, laptop, or screen. The magnetism can permanently damage these devices and wipe information from cards.

Thermal limits

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and pulling force.

Fire risk

Combustion risk: Rare earth powder is highly flammable. Do not process magnets without safety gear as this risks ignition.

Security! Details about hazards in the article: Safety of working with magnets.