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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 parameters »

180.00 ZŁ with VAT / pcs + price for transport

146.34 ZŁ net + 23% VAT / pcs

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Give us a call +48 888 99 98 98 alternatively get in touch via inquiry form our website.
Weight as well as appearance of neodymium magnets can be estimated using our magnetic mass calculator.

Order by 14:00 and we’ll ship today!

💡 Check why professionals choose Dhit over cheap substitutes

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!

Technical - 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
Engineering data and GPSR
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%
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: 210386-2026
Magnet Unit Converter
Force (pull)
Field Strength
Input your value in a single field to see the conversion in all other fields immediately.

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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. Model UMP 65x45 [M8]x2 GW F230+ Lina / N38 offers an optimal weight-to-pull force ratio, which is important for repeated throwing. For beginners, we recommend lighter single-sided models (F80-F200), for advanced users - heavier double-sided (Two-Side) ones.
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. 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.
We offer both standalone holders and ready-made gift sets (depending on the selected option in the store). 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.
This force applies to perfect adherence with the entire surface to a smooth, clean steel plate with a min. thickness of 20mm. In a river, objects are often rusty, silted, or irregular in shape (e.g., pipes), which drastically reduces grip strength. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.
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 best value because for the same money, you obtain professional-grade equipment that will serve you for many seasons than generic imports.
As a result, despite the market price, the lifespan of the Dhit product puts it a step above other brands.
Many distributors use a trick by promoting the power measured only on the top hook. GOLD mounts guarantees honest data by stating the real parameters of the gear, so you can be sure during real field work.
{Unlike anonymous sellers, Dhit provides expert advice and real warranty help, which is crucial after the purchase. Don't risk it with random brands, stick with the market leader that cares about the happiness of searcher.

Advantages as well as disadvantages of neodymium magnets.

Benefits

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They have constant strength, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • Magnets very well resist against demagnetization caused by ambient magnetic noise,
  • Thanks to the shimmering finish, the surface of Ni-Cu-Ni, gold, or silver gives an professional appearance,
  • Magnets possess exceptionally strong magnetic induction on the surface,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures reaching 230°C and above...
  • Due to the ability of flexible forming and customization to unique solutions, NdFeB magnets can be created in a variety of shapes and sizes, which amplifies use scope,
  • Key role in electronics industry – they are commonly used in mass storage devices, brushless drives, precision medical tools, as well as modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which enables their usage in small systems

Limitations

Cons of neodymium magnets: application proposals
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend 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 propose using casing - magnetic mount.
  • Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. Furthermore, small elements of these devices are able to complicate diagnosis medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Magnetic strength at its maximum – what affects it?

Breakaway force was determined for ideal contact conditions, including:
  • with the use of a sheet made of special test steel, ensuring full magnetic saturation
  • possessing a thickness of at least 10 mm to ensure full flux closure
  • with a surface perfectly flat
  • with zero gap (no paint)
  • for force applied at a right angle (in the magnet axis)
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

In real-world applications, the real power results from several key aspects, listed from the most important:
  • Distance – the presence of foreign body (rust, dirt, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Force direction – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Base massiveness – too thin sheet does not accept the full field, causing part of the power to be escaped to the other side.
  • Material type – the best choice is pure iron steel. Stainless steels may attract less.
  • Surface quality – the more even the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity was determined with the use of a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the holding force is lower. In addition, even a minimal clearance between the magnet and the plate decreases the lifting capacity.

Precautions when working with NdFeB magnets
Heat sensitivity

Keep cool. NdFeB magnets are sensitive to heat. If you need operation above 80°C, ask us about HT versions (H, SH, UH).

Respect the power

Use magnets consciously. Their immense force can surprise even professionals. Be vigilant and respect their power.

Dust explosion hazard

Mechanical processing of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Compass and GPS

A powerful magnetic field interferes with the functioning of magnetometers in phones and navigation systems. Keep magnets close to a smartphone to prevent breaking the sensors.

Nickel coating and allergies

It is widely known that the nickel plating (the usual finish) is a strong allergen. If your skin reacts to metals, avoid direct skin contact and select coated magnets.

Pinching danger

Protect your hands. Two large magnets will join instantly with a force of several hundred kilograms, crushing anything in their path. Be careful!

Medical implants

For implant holders: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or request help to work with the magnets.

Threat to electronics

Intense magnetic fields can corrupt files on payment cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.

Protective goggles

Neodymium magnets are ceramic materials, meaning they are very brittle. Collision of two magnets will cause them cracking into shards.

Swallowing risk

Neodymium magnets are not suitable for play. Accidental ingestion of several magnets can lead to them pinching intestinal walls, which poses a critical condition and requires urgent medical intervention.

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