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UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder

search holder

Catalog no 210338

GTIN/EAN: 5906301813972

5.00
Load capacity 480.00 kg / 4707.19 N
Diameter Ø
107 mm [±1 mm]
Height
40 mm [±1 mm]
Weight
2350 g
Coating
[NiCuNi] Nickel
Magnetic Flux
~ 10 000 Gauss [±5%]

How we measure these parameters — certificates and measurements

check specifications »

325.20 zł net / pcs

400.00 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

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Quantity
Net
Gross
price from 1 pcs
325.20 zł
400.00 zł
price from 5 pcs
305.69 zł
376.00 zł
price from 10 pcs
286.18 zł
352.00 zł

Frequently asked questions

What rope length is best for deeper water?
Choose the length for the site and the retrieval method rather than the magnet's nominal pull rating. Allow for abrasion at the bank and check the rope, knot and attachment point as a complete set.
Where should I buy a fishing magnet, and what should I check?
Look for a product card stating the magnet grade, measured pull force and test conditions. Compare the ratings of the rope and connectors too; a large number in the magnet's name does not describe the capacity of the entire set.
What pull rating is suitable for magnet fishing in a river?
In a river, contact angle, surface condition and water movement affect the grip. All F-series models are double-sided. Compare vertical and side pull for the specific model; double-sided does not mean 360°.
Can I buy a complete starter set for magnet fishing?
Check whether the selected offer includes the magnet, rope and connectors, and whether each component has suitable specifications. Follow local safety rules and use protective equipment appropriate for the site.
Which rope can be paired with a magnet rated at several hundred kilograms?
Check the rated capacity of every component: rope, knot, shackle and eyelet. The weakest component limits the set. F200 GOLD has approximately 250 kg vertical pull and 38 kg side pull. Rope sets normally include a blue rope from a Polish manufacturer, 8 mm in diameter and 25 m long. Diameter alone does not determine rope strength.
How is a fishing magnet different from an ordinary magnetic holder?
Fishing holders provide attachment points for an eyelet and rope. All F-series models have magnets on both faces and both faces attract metal. Check the threads, coating and operating conditions of the specific model.
Will the rope be the first component to fail with a heavy find?
Not necessarily. The knot, shackle, thread or magnetic contact may limit the set first. Compare the ratings of all components and remember that an angled pull can detach the magnet before the rope reaches its rated load.
What should I look for in a shop selling fishing magnets?
Check availability, detailed product specifications, test conditions for pull force and the possibility of buying replacement accessories. Compare the whole set rather than just its advertised maximum pull force.
What does F mean in a model name? Does F200 mean a 200 kg pull rating?
F is a model designation, not a pull rating. Confirmed vertical / side pull values: F200 and F200 GOLD — approximately 250 / 38 kg; F200 PLATINIUM N52 — 310 / approximately 61 kg; new F300 — 330 / 58 kg; old F300 — approximately 360 / 64 kg; F200 GOLD DUAL — approximately 610 / 76–82 kg. The old F600 with a top M12 eyelet and side M10 threads has approximately 650 kg vertical pull. Contact conditions affect the actual grip.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power 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 dimensions and grade – Compare the specifications of the exact model in the technical table. Thickness, material grade and geometry all affect holding force and field reach.
  • 🛡️ Protective coating – Check the coating specified for the product and match it to the working environment. Water, impacts and scratches can shorten the life of an inadequately protected magnet.
  • 🧲 Mounting and force direction – The mounting method affects the actual force of the assembly. Use components intended for the specific model and follow the recommendations on its product page.
  • 🧶 Accessory selection – If the product is used with a rope, shackle or hook, check the load rating of every component. The weakest component determines the safety of the complete assembly.
  • 🚀 Choose using comparable data: Each product page lists the magnet grade, dimensions, coating and measured holding force. Compare models using the same parameters and test conditions.

Invest in solid equipment and enjoy the results!

Technical - UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder

Specification / characteristics - UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder

properties
properties values
Cat. no. 210338
GTIN/EAN 5906301813972
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 107 mm [±1 mm]
Height 40 mm [±1 mm]
Weight 2350 g
Load capacity ~ ? 480.00 kg / 4707.19 N
Coating [NiCuNi] Nickel
Holder Type 2 sided
Material Type Structural steel S235 (ferrous)
Magnetic Flux ~ 10 000 Gauss [±5%]
Size/Mount Quantity 2xM8/1xM10
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 107x40 [M8+M10] GW F 400 kg / N38 - search holder
properties values units
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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%

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: 210338-2026
Measurement Calculator

Magnet pull force

Field Strength

Simply populate one field, to let the tool calculate the rest for you.

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All F-series holders have magnets on both faces and both faces attract metal. Choose by weight and retrieval method. F200 / F200 GOLD: approximately 250 kg vertical pull and 38 kg side pull. F200 PLATINIUM N52: 310 kg vertical pull and approximately 61 kg side pull. The laboratory pull rating is not the weight of any object recoverable from water.
All F models are double-sided. DUAL means two connected F200 holders: approximately 610 kg vertical pull and 76–82 kg side pull. Use a side eyelet for dragging and a top eyelet for vertical retrieval. The new F300 has M10 threads throughout; the old F300 has a top M10 thread and side M8 threads. Double-sided does not mean 360°.
Our holders have a thick steel housing covered with an anti-corrosion layer (chrome, nickel, zinc). 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.
It is a technical parameter defining perpendicular break force, not the weight of an object in water. The magnet may slide on round elements (bicycle frame) due to the small contact area. 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 smartest investment because for the same money, you obtain a premium mount that will serve you for much longer than generic imports.
A special technology of mounting the magnet in the protective cup builds a unified structure that absorbs impacts while fishing on rough surfaces.
It is worth remembering that the same magnet pulled by the lateral point can actually show only a fraction of power instead of the declared 200 kg. Crucially, in the web, it is hard to find videos testing the actual strength of other brands on the lateral attachment.
GOLD search mounts are available in several variants for different conditions. Compare the dimensions, mounting points and pull forces in the product cards before choosing a model.

Advantages and disadvantages of Nd2Fe14B magnets.

Benefits

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • They retain attractive force for almost 10 years – the loss is just ~1% (based on simulations),
  • They are extremely resistant to demagnetization induced by external field influence,
  • A magnet with a smooth silver surface is more attractive,
  • Neodymium magnets achieve maximum magnetic induction on a small area, which ensures high operational effectiveness,
  • Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
  • Thanks to the option of free shaping and customization to custom projects, magnetic components can be modeled in a wide range of shapes and sizes, which amplifies use scope,
  • Wide application in high-tech industry – they are utilized in hard drives, electric drive systems, precision medical tools, as well as complex engineering applications.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Disadvantages

What to avoid - cons of neodymium magnets and ways of using them
  • To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution protects the magnet and simultaneously increases its durability.
  • Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
  • 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
  • Due to limitations in creating threads and complicated shapes in magnets, we propose using a housing - magnetic holder.
  • Potential hazard resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these devices are able to complicate diagnosis medical when they are in the body.
  • Due to neodymium price, their price is higher than average,

Pull force analysis

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

Holding force of 480.00 kg is a measurement result performed under specific, ideal conditions:
  • with the contact of a sheet made of special test steel, guaranteeing maximum field concentration
  • whose thickness is min. 10 mm
  • with an ideally smooth contact surface
  • under conditions of ideal adhesion (surface-to-surface)
  • during pulling in a direction perpendicular to the mounting surface
  • at temperature room level

Lifting capacity in practice – influencing factors

Real force is affected by working environment parameters, such as (from priority):
  • Air gap (between the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Metal type – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
  • Smoothness – ideal contact is obtained only on polished steel. Rough texture create air cushions, weakening the magnet.
  • Temperature – temperature increase results in weakening of induction. Check the maximum operating temperature for a given model.

Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a small distance between the magnet and the plate reduces the holding force.

Safety rules for work with NdFeB magnets
Power loss in heat

Watch the temperature. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.

Bodily injuries

Large magnets can crush fingers in a fraction of a second. Never place your hand between two attracting surfaces.

Pacemakers

Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.

Respect the power

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Keep away from computers

Avoid bringing magnets near a wallet, laptop, or screen. The magnetism can permanently damage these devices and erase data from cards.

Product not for children

Neodymium magnets are not intended for children. Swallowing multiple magnets may result in them pinching intestinal walls, which constitutes a severe health hazard and requires urgent medical intervention.

Risk of cracking

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

Allergic reactions

A percentage of the population have a contact allergy to Ni, which is the typical protective layer for NdFeB magnets. Extended handling may cause skin redness. We suggest wear protective gloves.

GPS and phone interference

Note: neodymium magnets generate a field that confuses precision electronics. Maintain a safe distance from your phone, tablet, and GPS.

Flammability

Fire warning: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this may cause fire.

Safety First! Want to know more? Check our post: Why are neodymium magnets dangerous?