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UMP 65x45 [M8]x2 GW F230+ Lina / N38 - search holder

search holder

Catalog no 210386

GTIN/EAN: 5906301814054

5.00

Diameter Ø

65 mm [±1 mm]

Height

45 mm [±1 mm]

Weight

1170 g

Load capacity

230.00 kg / 2255.53 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 6 000 Gauss [±5%]

technical specifications »

180.00 ZŁ with VAT / pcs + price for transport

146.34 ZŁ net + 23% VAT / pcs

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

Pick up the phone and ask +48 888 99 98 98 alternatively contact us by means of contact form through our site.
Lifting power as well as shape of a magnet can be estimated on our magnetic mass calculator.

Orders submitted before 14:00 will be dispatched today!

💡 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 of the product - UMP 65x45 [M8]x2 GW F230+ Lina / N38 - search holder

Specification / characteristics - UMP 65x45 [M8]x2 GW F230+ Lina / N38 - search holder

properties
properties values
Cat. no. 210386
GTIN/EAN 5906301814054
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 1170 g
Load capacity ~ ? 230.00 kg / 2255.53 N
Coating [NiCuNi] Nickel
Holder Type 2 sided
Material Type Structural steel S235 (ferrous)
Magnetic Flux ~ 6 000 Gauss [±5%]
Rope Length 25 m
Rope Capacity ~ 1595 kg
Rope Diameter Ø 8 mm
Gloves 1 pair
Size/Mount Quantity 1xM8/2xM10
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 65x45 [M8]x2 GW F230+ 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
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: 210386-2026
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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. 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. 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). Avoid throwing the magnet against bridge pillars or hard obstacles. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.
We offer both standalone holders and ready-made gift sets (depending on the selected option in the store). In the package, you will find everything needed: strong rope (e.g., 20m), gloves, and hardware. Using thread glue is crucial to not lose the magnet in silt.
The capacity given in the name (e.g., 230.00 kg) is the maximum value measured in laboratory conditions. The magnet may slide on round elements (bicycle frame) due to the small contact area. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.
If you find a dangerous object (unexploded ordnance) or an antique, you have a legal obligation to report it to appropriate services (Police, conservator). Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.
By selecting Dhit GOLD mounts, you get a product of a significantly higher standard and real N52 grade for the same market price.
As a result, despite the affordable cost, the lifespan of the GOLD mount positions it far ahead of other brands.
Many sellers employ a tactic by advertising the power tested exclusively on the top hook. GOLD mounts focuses on honest data by stating the actual capabilities of the magnet, so you avoid disappointment during real field work.
{By choosing Dhit, you support Polish engineering that knows the specifics of our waters. Every mount is checked before delivery, which ensures that you the set will be of the defect-free.

Advantages and disadvantages of rare earth magnets.

Benefits

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They virtually do not lose power, because even after ten years the performance loss is only ~1% (in laboratory conditions),
  • They maintain their magnetic properties even under strong external field,
  • Thanks to the shiny finish, the plating of nickel, gold, or silver gives an clean appearance,
  • Magnets have huge magnetic induction on the outer layer,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of custom shaping and adjusting to precise needs,
  • Versatile presence in modern technologies – they serve a role in computer drives, drive modules, precision medical tools, as well as other advanced devices.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Weaknesses

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we recommend using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in producing threads and complicated shapes in magnets, we recommend using casing - magnetic mechanism.
  • Health risk related to microscopic parts of magnets are risky, if swallowed, which becomes key in the context of child safety. It is also worth noting that tiny parts of these devices are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Pull force analysis

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

The force parameter is a measurement result performed under standard conditions:
  • using a base made of mild steel, acting as a circuit closing element
  • possessing a thickness of at least 10 mm to ensure full flux closure
  • characterized by smoothness
  • with zero gap (no paint)
  • during detachment in a direction perpendicular to the plane
  • in temp. approx. 20°C

Determinants of practical lifting force of a magnet

During everyday use, the actual lifting capacity is determined by many variables, presented from most significant:
  • Clearance – existence of any layer (paint, dirt, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Plate thickness – too thin plate causes magnetic saturation, causing part of the flux to be lost into the air.
  • Material type – the best choice is high-permeability steel. Hardened steels may attract less.
  • Plate texture – ground elements ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
  • Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate reduces the load capacity.

H&S for magnets
Flammability

Dust created during grinding of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Risk of cracking

Neodymium magnets are sintered ceramics, which means they are very brittle. Clashing of two magnets leads to them breaking into small pieces.

Physical harm

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

Sensitization to coating

It is widely known that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, refrain from touching magnets with bare hands or choose versions in plastic housing.

Operating temperature

Control the heat. Exposing the magnet to high heat will permanently weaken its properties and pulling force.

Precision electronics

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

Threat to electronics

Powerful magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Stay away of at least 10 cm.

Powerful field

Handle with care. Rare earth magnets attract from a distance and connect with massive power, often faster than you can react.

Medical interference

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

Danger to the youngest

NdFeB magnets are not toys. Eating multiple magnets may result in them attracting across intestines, which poses a direct threat to life and necessitates urgent medical intervention.

Warning! Looking for details? Check our post: Why are neodymium magnets dangerous?