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UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

search holder

Catalog no 210339

GTIN/EAN: 5906301813989

5.00

Diameter Ø

135 mm [±1 mm]

Height

40 mm [±1 mm]

Weight

4300 g

Load capacity

680.00 kg / 6668.52 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 10 000 Gauss [±5%]

599.99 with VAT / pcs + price for transport

487.80 ZŁ net + 23% VAT / pcs

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Call us +48 888 99 98 98 alternatively let us know via contact form the contact page.
Parameters and form of magnets can be estimated with our magnetic mass 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 details - UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

Specification / characteristics - UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

properties
properties values
Cat. no. 210339
GTIN/EAN 5906301813989
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 135 mm [±1 mm]
Height 40 mm [±1 mm]
Weight 4300 g
Load capacity ~ ? 680.00 kg / 6668.52 N
Coating [NiCuNi] Nickel
Holder Type 2 sided
Material Type Structural steel S235 (ferrous)
Magnetic Flux ~ 10 000 Gauss [±5%]
Size/Mount Quantity 2xM10/1xM12
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 135x40 [M10+M12] GW F 600 kg / 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
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%
Environmental data
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: 210339-2026
Measurement Calculator
Pulling force

Field Strength

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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 double-sided model attracts from above and below, increasing the chance of hooking a find. 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. 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. We often add thread glue to secure the eyelet against unscrewing in water. We recommend always securing the thread with glue or tightening the eyelet firmly before first use.
The capacity given in the name (e.g., 680.00 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%. 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.
Unlike other brands, Dhit does not cut corners on materials, which translates into a clear advantage during every trip to the water.
The unique way of gluing and seating the magnet in the protective cup creates a solid structure that dampens shocks while fishing on difficult, rocky bottoms.
Many distributors use a trick by promoting the pull force tested only on the top hook. The Dhit brand focuses on full transparency by stating the actual capabilities of the magnet, so you avoid disappointment during real field work.
{By choosing Dhit, you bet on a local market leader that perfectly understands the conditions of our waters. Every product is individually inspected before delivery, which ensures that you receive equipment of the defect-free.

Advantages as well as disadvantages of Nd2Fe14B magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • Their magnetic field is maintained, and after around ten years it decreases only by ~1% (theoretically),
  • They maintain their magnetic properties even under strong external field,
  • A magnet with a metallic silver surface looks better,
  • Magnets are distinguished by excellent magnetic induction on the outer side,
  • Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures reaching 230°C and above...
  • In view of the possibility of flexible molding and customization to custom requirements, magnetic components can be created in a wide range of shapes and sizes, which expands the range of possible applications,
  • Universal use in future technologies – they are utilized in mass storage devices, electric drive systems, medical equipment, also technologically advanced constructions.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a strong case, which not only secures them against impacts but also increases their durability
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in producing threads and complicated forms in magnets, we propose using a housing - magnetic mechanism.
  • Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which gains importance in the context of child health protection. Furthermore, tiny parts of these devices can disrupt the diagnostic process medical after entering the body.
  • With large orders the cost of neodymium magnets is a challenge,

Holding force characteristics

Maximum lifting force for a neodymium magnet – what it depends on?

Holding force of 680.00 kg is a theoretical maximum value executed under specific, ideal conditions:
  • on a base made of structural steel, optimally conducting the magnetic flux
  • whose thickness equals approx. 10 mm
  • characterized by lack of roughness
  • with zero gap (without paint)
  • during detachment in a direction vertical to the plane
  • in temp. approx. 20°C

Key elements affecting lifting force

During everyday use, the real power results from several key aspects, ranked from the most important:
  • Distance (betwixt the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to paint, rust or debris).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Chemical composition of the base – low-carbon steel gives the best results. Alloy steels reduce magnetic properties and holding force.
  • Smoothness – ideal contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a minimal clearance between the magnet and the plate reduces the lifting capacity.

Safe handling of NdFeB magnets
No play value

Only for adults. Small elements pose a choking risk, causing severe trauma. Keep away from children and animals.

Health Danger

For implant holders: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or ask another person to work with the magnets.

Avoid contact if allergic

Some people suffer from a sensitization to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact might lead to dermatitis. We suggest wear protective gloves.

Pinching danger

Risk of injury: The attraction force is so great that it can cause hematomas, crushing, and broken bones. Protective gloves are recommended.

Thermal limits

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

Electronic devices

Equipment safety: Strong magnets can ruin data carriers and sensitive devices (pacemakers, hearing aids, timepieces).

Fragile material

Neodymium magnets are ceramic materials, meaning they are very brittle. Clashing of two magnets will cause them cracking into small pieces.

Keep away from electronics

Remember: rare earth magnets produce a field that interferes with sensitive sensors. Keep a safe distance from your mobile, device, and navigation systems.

Flammability

Powder produced during grinding of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Safe operation

Before starting, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.

Security! Need more info? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98