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UMP 75x24 [M8+M10] GW F 200 kg - search holder

search holder

Catalog no 210336

GTIN/EAN: 5906301813958

Diameter Ø

75 mm [±1 mm]

Height

24 mm [±1 mm]

Weight

900 g

Load capacity

280.00 kg / 2745.86 N

Coating

[NiCuNi] Nickel

technical specifications »

200.00 ZŁ with VAT / pcs + price for transport

162.60 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
Want to talk magnets?

Give us a call +48 888 99 98 98 or drop us a message via contact form the contact form page.
Force as well as shape of a magnet can be estimated using our force calculator.

Orders placed before 14:00 will be shipped the same business day.

💡 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!

Technical - UMP 75x24 [M8+M10] GW F 200 kg - search holder

Specification / characteristics - UMP 75x24 [M8+M10] GW F 200 kg - search holder

properties
properties values
Cat. no. 210336
GTIN/EAN 5906301813958
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 24 mm [±1 mm]
Weight 900 g
Load capacity ~ ? 280.00 kg / 2745.86 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
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%
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: 210336-2026
Magnet Unit Converter
Magnet pull force
Magnetic Induction
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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. This specific magnet ensures a laboratory lifting capacity of up to 280.00 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. The double-sided version increases search efficiency by 100%.
This construction protects the brittle neodymium from direct impact against stones and the bottom. 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.
Check the product title and description to see if you are buying just the magnet or the XL set. 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.
The capacity given in the name (e.g., 280.00 kg) is the maximum value measured in laboratory conditions. 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.
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.
A special technology of gluing and seating the magnet in the Dhit housing creates a solid structure that absorbs impacts while fishing on difficult, rocky bottoms.
Many distributors employ a tactic by promoting the pull force measured exclusively on the top hook. GOLD mounts focuses on honest data by providing the actual capabilities of the gear, so you can be sure during treasure hunting.
{By choosing Dhit, you bet on a local market leader that knows the specifics of our waters. Don't risk it with unknown goods, stick with proven gear that cares about the happiness of every user.

Strengths and weaknesses of neodymium magnets.

Benefits

Apart from their consistent power, neodymium magnets have these key benefits:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
  • They have excellent resistance to magnetic field loss when exposed to external fields,
  • Thanks to the shimmering finish, the layer of nickel, gold, or silver-plated gives an modern appearance,
  • Neodymium magnets achieve maximum magnetic induction on a small area, which increases force concentration,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
  • Possibility of custom machining as well as adjusting to defined needs,
  • Fundamental importance in high-tech industry – they serve a role in magnetic memories, electric drive systems, medical devices, also other advanced devices.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Limitations

Disadvantages of neodymium magnets:
  • At very strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Due to limitations in creating nuts and complex shapes in magnets, we recommend using cover - magnetic mechanism.
  • Health risk to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. Additionally, small components of these devices can disrupt the diagnostic process medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

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

Magnet power was determined for optimal configuration, assuming:
  • with the contact of a sheet made of special test steel, ensuring full magnetic saturation
  • possessing a thickness of min. 10 mm to avoid saturation
  • characterized by smoothness
  • under conditions of ideal adhesion (metal-to-metal)
  • for force acting at a right angle (in the magnet axis)
  • at room temperature

Lifting capacity in practice – influencing factors

Please note that the magnet holding will differ influenced by elements below, starting with the most relevant:
  • Distance – the presence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Chemical composition of the base – mild steel gives the best results. Higher carbon content lower magnetic permeability and lifting capacity.
  • Surface finish – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Operating temperature – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity was assessed using a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the load capacity is reduced by as much as fivefold. Additionally, even a slight gap between the magnet and the plate reduces the holding force.

H&S for magnets
Health Danger

People with a heart stimulator should keep an safe separation from magnets. The magnetism can interfere with the operation of the life-saving device.

Precision electronics

A strong magnetic field interferes with the functioning of magnetometers in phones and GPS navigation. Do not bring magnets close to a device to avoid breaking the sensors.

Skin irritation risks

Certain individuals experience a hypersensitivity to nickel, which is the standard coating for neodymium magnets. Frequent touching may cause dermatitis. We suggest wear protective gloves.

Flammability

Dust created during machining of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Shattering risk

Watch out for shards. Magnets can explode upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.

Powerful field

Use magnets consciously. Their powerful strength can surprise even experienced users. Plan your moves and do not underestimate their power.

Threat to electronics

Equipment safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, medical aids, timepieces).

Hand protection

Pinching hazard: The pulling power is so immense that it can result in hematomas, pinching, and even bone fractures. Use thick gloves.

Permanent damage

Control the heat. Heating the magnet above 80 degrees Celsius will ruin its properties and strength.

No play value

Absolutely store magnets away from children. Risk of swallowing is high, and the consequences of magnets connecting inside the body are fatal.

Safety First! Looking for details? Read our article: Why are neodymium magnets dangerous?