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UMP 97x40 [M8+M10] GW F300 Lina / N38 - search holder

search holder

Catalog no 210383

GTIN/EAN: 5906301814023

5.00

Diameter Ø

97 mm [±1 mm]

Height

40 mm [±1 mm]

Weight

2200 g

Load capacity

380.00 kg / 3726.53 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 10 000 Gauss [±5%]

check technical specifications »

370.00 ZŁ with VAT / pcs + price for transport

300.81 ZŁ net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety
Not sure what to buy?

Give us a call +48 22 499 98 98 or let us know via inquiry form through our site.
Parameters along with appearance of magnetic components can be analyzed on our modular 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!

Technical - UMP 97x40 [M8+M10] GW F300 Lina / N38 - search holder

Specification / characteristics - UMP 97x40 [M8+M10] GW F300 Lina / N38 - search holder

properties
properties values
Cat. no. 210383
GTIN/EAN 5906301814023
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 97 mm [±1 mm]
Height 40 mm [±1 mm]
Weight 2200 g
Load capacity ~ ? 380.00 kg / 3726.53 N
Coating [NiCuNi] Nickel
Holder Type 2 sided
Material Type Structural steel S235 (ferrous)
Magnetic Flux ~ 10 000 Gauss [±5%]
Rope Length 25 m
Rope Capacity ~ 1595 kg
Rope Diameter Ø 8 mm
Gloves 1 pair
Size/Mount Quantity 2xM8/1xM10
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 97x40 [M8+M10] GW F300 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
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%
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: 210383-2026
Magnet Unit Converter
Pulling force
Field Strength
Input a figure in just one field to see the conversion in the other fields immediately.

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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. 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 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.
The magnet is glued into a solid steel cup and sealed with epoxy resin, protecting it from water. Despite solid construction, neodymium is a brittle material and can chip upon very strong impact (e.g., against concrete). 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. 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. A large power reserve is essential in real search conditions.
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.
By selecting the Dhit brand, you receive a product of a significantly higher standard and true magnetic power for the same market price.
Dhit GOLD mounts utilize a robust construction that acts as a real armor for the magnetic core.
Many sellers employ a tactic by advertising the pull force tested only on the top hook. Interestingly, in the entire internet, it is hard to find videos testing the real side-pull force of competitor products on the side hook.
{By choosing GOLD mounts, you bet on Polish engineering that perfectly understands the specifics of our waters. Every mount is individually inspected before delivery, which ensures that you the set will be of the highest quality.

Advantages and disadvantages of Nd2Fe14B magnets.

Advantages

Besides their durability, neodymium magnets are valued for these benefits:
  • They have stable power, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
  • They retain their magnetic properties even under close interference source,
  • By applying a smooth coating of nickel, the element acquires an aesthetic look,
  • They are known for high magnetic induction at the operating surface, which affects their effectiveness,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Possibility of individual creating as well as modifying to specific conditions,
  • Fundamental importance in advanced technology sectors – they serve a role in hard drives, motor assemblies, medical devices, also complex engineering applications.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Limitations

What to avoid - cons of neodymium magnets and proposals for their use:
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation as well as corrosion.
  • We recommend cover - magnetic mechanism, due to difficulties in producing threads inside the magnet and complicated forms.
  • Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, tiny parts of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets is economically unviable,

Lifting parameters

Best holding force of the magnet in ideal parameters – what contributes to it?

Breakaway force is the result of a measurement for ideal contact conditions, taking into account:
  • using a base made of high-permeability steel, serving as a circuit closing element
  • with a cross-section minimum 10 mm
  • characterized by lack of roughness
  • under conditions of no distance (surface-to-surface)
  • under axial force vector (90-degree angle)
  • at room temperature

Magnet lifting force in use – key factors

In real-world applications, the real power results from many variables, presented from most significant:
  • Space between surfaces – every millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Steel grade – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
  • Surface finish – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a slight gap between the magnet’s surface and the plate lowers the load capacity.

H&S for magnets
Threat to navigation

A powerful magnetic field disrupts the operation of magnetometers in smartphones and navigation systems. Maintain magnets near a smartphone to avoid damaging the sensors.

Choking Hazard

Always keep magnets away from children. Choking hazard is significant, and the consequences of magnets clamping inside the body are very dangerous.

Pacemakers

Patients with a heart stimulator have to maintain an large gap from magnets. The magnetic field can interfere with the operation of the implant.

Do not underestimate power

Handle magnets consciously. Their huge power can shock even experienced users. Plan your moves and respect their power.

Fire warning

Fire warning: Rare earth powder is explosive. Avoid machining magnets without safety gear as this risks ignition.

Allergic reactions

Studies show that the nickel plating (the usual finish) is a common allergen. For allergy sufferers, refrain from direct skin contact and opt for coated magnets.

Magnetic media

Powerful magnetic fields can destroy records on credit cards, HDDs, and storage devices. Keep a distance of at least 10 cm.

Shattering risk

Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Finger safety

Risk of injury: The attraction force is so immense that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.

Permanent damage

Watch the temperature. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.

Safety First! More info about risks in the article: Magnet Safety Guide.