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

search holder

Catalog no 210386

GTIN/EAN: 5906301814054

5.00
Load capacity 230.00 kg / 2255.53 N
Diameter Ø
65 mm [±1 mm]
Height
45 mm [±1 mm]
Weight
1170 g
Coating
[NiCuNi] Nickel
Magnetic Flux
~ 6 000 Gauss [±5%]
product parameters »

180.00 zł with VAT / pcs + price for transport

146.34 zł net + 23% VAT / pcs

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Call us +48 888 99 98 98 alternatively drop us a message by means of request form through our site.
Specifications and structure of a magnet can be estimated on our our magnetic 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?

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!

Product card - 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 and environmental data

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%

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: 210386-2026
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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. This specific magnet ensures a laboratory lifting capacity of up to 230.00 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).
The 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. 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. The housing significantly increases lifespan but does not make the magnet completely indestructible. 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. We often add thread glue to secure the eyelet against unscrewing in water. 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. 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.
Possessing and using a neodymium magnet to clean the bottom is generally legal, provided you are not searching for artifacts protected by law. Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.
It is the smartest investment because for the same money, you obtain professional-grade equipment that will last for many seasons than budget alternatives.
Dhit GOLD mounts utilize a robust construction that provides a true shield for the brittle neodymium.
You should know that the same magnet used by the lateral point often has only a fraction of strength instead of the declared 200 kg. The Dhit brand focuses on full transparency by stating the actual capabilities of the magnet, so you avoid disappointment during treasure hunting.
{By choosing Dhit, you bet on a local market leader that perfectly understands the conditions of local rivers and lakes. Don't risk it with unknown goods, it is better to choose proven gear that cares about the satisfaction of searcher.

Pros as well as cons of neodymium magnets.

Strengths

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They retain magnetic properties for almost 10 years – the drop is just ~1% (based on simulations),
  • They are resistant to demagnetization induced by external magnetic fields,
  • A magnet with a smooth nickel surface has an effective appearance,
  • Neodymium magnets ensure maximum magnetic induction on a small area, which allows for strong attraction,
  • 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...
  • Thanks to freedom in constructing and the capacity to adapt to unusual requirements,
  • Huge importance in high-tech industry – they serve a role in computer drives, electromotive mechanisms, precision medical tools, and modern systems.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Disadvantages

Characteristics of disadvantages of neodymium magnets: application proposals
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We recommend 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 strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 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 immune to moisture, in case of application outdoors
  • We suggest casing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complicated shapes.
  • Health risk resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that tiny parts of these devices are able to complicate diagnosis medical in case of swallowing.
  • With large orders the cost of neodymium magnets is economically unviable,

Lifting parameters

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

The specified lifting capacity refers to the maximum value, obtained under optimal environment, namely:
  • on a plate made of mild steel, perfectly concentrating the magnetic field
  • with a cross-section of at least 10 mm
  • characterized by lack of roughness
  • under conditions of gap-free contact (metal-to-metal)
  • under perpendicular application of breakaway force (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Key elements affecting lifting force

During everyday use, the actual holding force depends on several key aspects, presented from the most important:
  • Distance – existence of any layer (paint, tape, air) interrupts the magnetic circuit, which reduces capacity rapidly (even by 50% at 0.5 mm).
  • Loading method – catalog parameter refers to pulling 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. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Metal type – not every steel reacts the same. Alloy additives worsen the attraction effect.
  • Surface condition – smooth surfaces ensure maximum contact, which improves force. Uneven metal reduce efficiency.
  • Thermal environment – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the lifting capacity is smaller. Additionally, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.

H&S for magnets
Protect data

Equipment safety: Neodymium magnets can damage payment cards and delicate electronics (pacemakers, medical aids, timepieces).

Keep away from electronics

Navigation devices and mobile phones are extremely sensitive to magnetism. Close proximity with a strong magnet can permanently damage the internal compass in your phone.

Shattering risk

Despite the nickel coating, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Life threat

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

Choking Hazard

These products are not intended for children. Eating a few magnets may result in them connecting inside the digestive tract, which poses a severe health hazard and requires urgent medical intervention.

Flammability

Machining of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Maximum temperature

Standard neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. This process is irreversible.

Nickel allergy

Studies show that nickel (standard magnet coating) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands and opt for versions in plastic housing.

Safe operation

Handle magnets consciously. Their powerful strength can shock even professionals. Stay alert and respect their force.

Bodily injuries

Large magnets can smash fingers instantly. Do not put your hand between two strong magnets.

Warning! Learn more about risks in the article: Safety of working with magnets.