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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

technical details »

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
Need advice?

Pick up the phone and ask +48 22 499 98 98 otherwise drop us a message using contact form the contact section.
Lifting power and appearance of magnetic components can be estimated with our modular calculator.

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

💡 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!

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
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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Pulling force
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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. It is equipment that can handle pulling heavy and silted objects from the river bottom. The choice depends on whether you plan to throw from the shore (double-sided) or from a bridge (single-sided).
The 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. 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.
The magnet is glued into a solid steel cup and sealed with epoxy resin, protecting it from water. Avoid throwing the magnet against bridge pillars or hard obstacles. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.
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. 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. Dirt, rust, paint, and algae create a distance that weakens the magnet by even 70-80%. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.
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.
It is the smartest investment because for the identical price, you buy a premium mount that will serve you for many seasons than budget alternatives.
Most magnets on the market have thin casings that crack during the any strong impact against underwater obstacles.
It is worth remembering that the same magnet used by the lateral point can actually show as little as 40 kg of strength instead of the promised 200 kg. GOLD mounts focuses on honest data by providing the real parameters of the gear, so you can be sure during real field work.
{Unlike anonymous sellers, Dhit provides expert advice and real service assistance, which is crucial after the purchase. Don't risk it with unknown goods, it is better to choose proven gear that cares about the happiness of every user.

Advantages as well as disadvantages of neodymium magnets.

Benefits

Apart from their notable magnetic energy, neodymium magnets have these key benefits:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (in laboratory conditions),
  • They do not lose their magnetic properties even under strong external field,
  • A magnet with a metallic nickel surface is more attractive,
  • Neodymium magnets create maximum magnetic induction on a small surface, which increases force concentration,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Possibility of accurate shaping and adapting to specific needs,
  • Versatile presence in advanced technology sectors – they serve a role in mass storage devices, drive modules, medical equipment, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which makes them useful in compact constructions

Weaknesses

Disadvantages of NdFeB magnets:
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its 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 and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
  • We suggest a housing - magnetic mount, due to difficulties in producing nuts inside the magnet and complicated shapes.
  • Possible danger related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, tiny parts of these magnets can complicate diagnosis medical after entering the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Detachment force of the magnet in optimal conditions – what affects it?

Magnet power was determined for optimal configuration, including:
  • using a sheet made of mild steel, serving as a ideal flux conductor
  • with a thickness of at least 10 mm
  • with an ground touching surface
  • with zero gap (no coatings)
  • during detachment in a direction perpendicular to the mounting surface
  • in neutral thermal conditions

Lifting capacity in practice – influencing factors

Effective lifting capacity is affected by working environment parameters, including (from priority):
  • Clearance – the presence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
  • Steel grade – ideal substrate is high-permeability steel. Hardened steels may generate lower lifting capacity.
  • Plate texture – ground elements ensure maximum contact, which increases force. Uneven metal reduce efficiency.
  • Temperature – temperature increase results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, in contrast under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate reduces the load capacity.

Safe handling of NdFeB magnets
No play value

Absolutely store magnets out of reach of children. Choking hazard is high, and the effects of magnets connecting inside the body are life-threatening.

Warning for heart patients

For implant holders: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.

Phone sensors

Remember: rare earth magnets produce a field that disrupts precision electronics. Maintain a safe distance from your phone, device, and GPS.

Dust explosion hazard

Machining of NdFeB material poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.

Keep away from computers

Device Safety: Strong magnets can damage payment cards and sensitive devices (pacemakers, medical aids, timepieces).

Immense force

Use magnets with awareness. Their powerful strength can surprise even professionals. Stay alert and respect their force.

Magnet fragility

Neodymium magnets are sintered ceramics, meaning they are very brittle. Impact of two magnets will cause them shattering into small pieces.

Permanent damage

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

Avoid contact if allergic

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If skin irritation occurs, cease working with magnets and wear gloves.

Crushing force

Protect your hands. Two powerful magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!

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