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UMP 67x28 [M8+M10] GW F120 Lina / N38 - search holder

search holder

Catalog no 210381

GTIN/EAN: 5906301814009

5.00

Diameter Ø

67 mm [±1 mm]

Height

28 mm [±1 mm]

Weight

700 g

Load capacity

180.00 kg / 1765.20 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 8 000 Gauss [±5%]

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
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Call us +48 22 499 98 98 otherwise drop us a message using contact form through our site.
Weight as well as structure of magnets can be checked using our magnetic calculator.

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💡 Check why professionals choose Dhit over cheap substitutes

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 specification of the product - UMP 67x28 [M8+M10] GW F120 Lina / N38 - search holder

Specification / characteristics - UMP 67x28 [M8+M10] GW F120 Lina / N38 - search holder

properties
properties values
Cat. no. 210381
GTIN/EAN 5906301814009
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 67 mm [±1 mm]
Height 28 mm [±1 mm]
Weight 700 g
Load capacity ~ ? 180.00 kg / 1765.20 N
Coating [NiCuNi] Nickel
Holder Type 2 sided
Material Type Structural steel S235 (ferrous)
Magnetic Flux ~ 8 000 Gauss [±5%]
Rope Length 25 m
Rope Capacity ~ 1595 kg
Rope Diameter Ø 8 mm
Gloves 1 pair
Size/Mount Quantity 2xM8/1xM10
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 67x28 [M8+M10] GW F120 Lina / N38 - search holder
properties values units
remenance Br [min. - max.] ? 12.2-12.6 kGs
remenance Br [min. - max.] ? 1220-1260 mT
coercivity bHc ? 10.8-11.5 kOe
coercivity bHc ? 860-915 kA/m
actual internal force iHc ≥ 12 kOe
actual internal force iHc ≥ 955 kA/m
energy density [min. - max.] ? 36-38 BH max MGOe
energy density [min. - max.] ? 287-303 BH max KJ/m
max. temperature ? ≤ 80 °C

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: 210381-2026
Measurement Calculator
Magnet pull force
Magnetic Induction
Type a number in any box, and the rest will convert on the fly.

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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. This specific magnet ensures a laboratory lifting capacity of up to 180.00 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. 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.
This construction protects the brittle neodymium from direct impact against stones and the bottom. Avoid throwing the magnet against bridge pillars or hard obstacles. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.
Most of our starter kits are complete and ready to use. In the package, you will find everything needed: strong rope (e.g., 20m), gloves, and hardware. 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. In a river, objects are often rusty, silted, or irregular in shape (e.g., pipes), which drastically reduces grip strength. 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. Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.
In contrast to other brands, Dhit does not cut corners on materials, which translates into a clear advantage during treasure hunting.
A special technology of mounting the magnet in the protective cup builds a unified structure that dampens shocks while fishing on difficult, rocky bottoms.
Many distributors employ a tactic by promoting the pull force measured exclusively on the vertical mount. Crucially, in the web, it is hard to find videos testing the real side-pull force of other brands on the lateral attachment.
{Unlike anonymous sellers, Dhit provides full support and instant service assistance, which gives peace of mind after the transaction. Instead of risking with unknown goods, it is better to choose proven gear that cares about the satisfaction of searcher.

Pros as well as cons of rare earth magnets.

Benefits

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • They have unchanged lifting capacity, and over more than ten years their attraction force decreases symbolically – ~1% (according to theory),
  • They are noted for resistance to demagnetization induced by external disturbances,
  • By applying a reflective coating of nickel, the element presents an nice look,
  • They show high magnetic induction at the operating surface, which improves attraction properties,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
  • Thanks to versatility in shaping and the ability to customize to individual projects,
  • Universal use in advanced technology sectors – they serve a role in computer drives, electric drive systems, medical equipment, as well as industrial machines.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Problematic aspects of neodymium magnets and ways of using them
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously increases its durability.
  • Neodymium magnets decrease their force 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 when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We suggest cover - magnetic holder, due to difficulties in realizing threads inside the magnet and complex forms.
  • Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. It is also worth noting that small elements of these products can be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Optimal lifting capacity of a neodymium magnet – what it depends on?

Holding force of 180.00 kg is a result of laboratory testing performed under specific, ideal conditions:
  • on a base made of structural steel, effectively closing the magnetic flux
  • with a cross-section minimum 10 mm
  • with an ideally smooth touching surface
  • without any clearance between the magnet and steel
  • during pulling in a direction perpendicular to the plane
  • at temperature room level

Key elements affecting lifting force

Effective lifting capacity is affected by working environment parameters, mainly (from priority):
  • Space between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds significantly lower power (often approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
  • Plate material – mild steel gives the best results. Higher carbon content decrease magnetic properties and holding force.
  • Plate texture – ground elements ensure maximum contact, which increases field saturation. Rough surfaces weaken the grip.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity was measured with the use of a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, in contrast under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet and the plate reduces the load capacity.

H&S for magnets
Caution required

Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Be predictive.

Health Danger

People with a ICD must maintain an large gap from magnets. The magnetic field can stop the functioning of the life-saving device.

Cards and drives

Intense magnetic fields can corrupt files on credit cards, HDDs, and other magnetic media. Keep a distance of min. 10 cm.

Dust is flammable

Fire hazard: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.

Heat sensitivity

Avoid heat. NdFeB magnets are sensitive to temperature. If you need operation above 80°C, look for special high-temperature series (H, SH, UH).

Magnetic interference

Navigation devices and smartphones are extremely susceptible to magnetic fields. Close proximity with a strong magnet can permanently damage the sensors in your phone.

Keep away from children

Adult use only. Small elements pose a choking risk, leading to severe trauma. Keep away from children and animals.

Beware of splinters

Despite the nickel coating, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Nickel allergy

A percentage of the population suffer from a sensitization to Ni, which is the standard coating for neodymium magnets. Frequent touching might lead to dermatitis. We recommend wear protective gloves.

Bone fractures

Large magnets can smash fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.

Attention! Looking for details? Check our post: Are neodymium magnets dangerous?