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

search holder

Catalog no 210348

GTIN/EAN: 5906301813996

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

technical specifications »

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 +48 888 99 98 98 if you prefer send us a note by means of our online form the contact page.
Lifting power as well as form of neodymium magnets can be checked with our power 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 parameters - UMP 65x45 [M8]x2 GW / N38 - search holder

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

properties
properties values
Cat. no. 210348
GTIN/EAN 5906301813996
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
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 65x45 [M8]x2 GW / 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
Elemental analysis
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: 210348-2026
Magnet Unit Converter
Force (pull)
Field Strength
Input a number in a box, and the rest change on the fly.

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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. 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 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. The double-sided version increases search efficiency by 100%.
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. 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. 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.
If you find a dangerous object (unexploded ordnance) or an antique, you have a legal obligation to report it to appropriate services (Police, conservator). We recommend familiarizing yourself with current local regulations and heritage protection laws.
It is the best value because for the identical price, you buy a premium mount that will last for much longer than budget alternatives.
The unique way of gluing and seating the magnet in the Dhit housing builds a unified structure that absorbs impacts while working on difficult, rocky bottoms.
You should know that the same magnet used by the side hook can actually show only 40 kg of strength instead of the declared 200 kg. Interestingly, in the web, it is hard to find recordings demonstrating the real side-pull force of other brands on the side hook.
{In contrast to anonymous sellers, Dhit provides expert advice and real service assistance, which gives peace of mind after the transaction. Every product is checked before shipping, which guarantees that you the set will be of the defect-free.

Pros as well as cons of neodymium magnets.

Strengths

Besides their exceptional strength, neodymium magnets offer the following advantages:
  • Their power remains stable, and after around 10 years it decreases only by ~1% (according to research),
  • Neodymium magnets remain exceptionally resistant to loss of magnetic properties caused by external interference,
  • By applying a lustrous layer of nickel, the element acquires an elegant look,
  • Neodymium magnets create maximum magnetic induction on a their surface, which increases force concentration,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures approaching 230°C and above...
  • Thanks to flexibility in forming and the ability to adapt to complex applications,
  • Fundamental importance in future technologies – they are commonly used in HDD drives, electric drive systems, diagnostic systems, also complex engineering applications.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Disadvantages of NdFeB magnets:
  • At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • We suggest cover - magnetic mechanism, due to difficulties in producing nuts inside the magnet and complicated shapes.
  • Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. Additionally, small elements of these devices are able to disrupt the diagnostic process medical in case of swallowing.
  • With mass production the cost of neodymium magnets can be a barrier,

Pull force analysis

Maximum magnetic pulling force – what contributes to it?

Magnet power was determined for optimal configuration, including:
  • on a block made of structural steel, optimally conducting the magnetic field
  • whose thickness is min. 10 mm
  • with a plane free of scratches
  • without the slightest air gap between the magnet and steel
  • during detachment in a direction vertical to the mounting surface
  • at conditions approx. 20°C

Practical aspects of lifting capacity – factors

Effective lifting capacity is affected by working environment parameters, such as (from priority):
  • Distance (between the magnet and the metal), as even a microscopic clearance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to paint, rust or debris).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Material type – ideal substrate is pure iron steel. Stainless steels may have worse magnetic properties.
  • Surface structure – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Thermal factor – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was measured by applying a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate reduces the holding force.

Safe handling of NdFeB magnets
Respect the power

Use magnets with awareness. Their immense force can shock even professionals. Be vigilant and respect their power.

Bodily injuries

Pinching hazard: The pulling power is so immense that it can result in hematomas, crushing, and broken bones. Protective gloves are recommended.

Mechanical processing

Machining of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Electronic devices

Device Safety: Strong magnets can ruin data carriers and delicate electronics (heart implants, medical aids, timepieces).

Precision electronics

Note: neodymium magnets generate a field that disrupts precision electronics. Keep a separation from your mobile, tablet, and navigation systems.

Shattering risk

Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.

ICD Warning

For implant holders: Strong magnetic fields affect electronics. Keep minimum 30 cm distance or request help to work with the magnets.

Heat sensitivity

Avoid heat. Neodymium magnets are susceptible to heat. If you need operation above 80°C, ask us about HT versions (H, SH, UH).

Allergy Warning

Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness appears, cease working with magnets and wear gloves.

This is not a toy

These products are not intended for children. Accidental ingestion of several magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and necessitates immediate surgery.

Attention! Details about risks in the article: Safety of working with magnets.