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Product available Ships tomorrow

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%]
product parameters »

400.00 zł with VAT / pcs + price for transport

325.20 zł net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety
Need help making a decision?

Contact us by phone +48 22 499 98 98 alternatively send us a note through our online form our website.
Weight along with form of neodymium magnets can be analyzed on our force 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!

Detailed specification - 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
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

Material specification

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: 210338-2026
Measurement Calculator

Force (pull)

Magnetic Field

Simply fill in a single box, to let the converter fill in everything else for you.

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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. It is equipment that can handle pulling heavy and silted objects from the river bottom. For beginners, we recommend lighter single-sided models (F80-F200), for advanced users - heavier double-sided (Two-Side) ones.
Double-sided holders (Two-Side) have two active magnetic surfaces and two mounting holes. 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%.
The magnet is glued into a solid steel cup and sealed with epoxy resin, protecting it from water. Avoid throwing the magnet against bridge pillars or hard obstacles. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.
We offer both standalone holders and ready-made gift sets (depending on the selected option in the store). A full set usually contains: magnet, polypropylene rope with appropriate strength, protective gloves, hook, and carabiner. 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. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.
Searches are allowed as long as you do not interfere with archaeological sites or search for weapons. Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.
Unlike other brands, Dhit uses the highest quality materials, which translates into a better results during treasure hunting.
The unique way 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 identical mount pulled by the lateral point often has as little as a fraction of power instead of the declared 200 kg. Crucially, in the web, it is hard to find videos testing the real side-pull force of other brands on the lateral attachment.
{By choosing Dhit, you support Polish engineering that perfectly understands the specifics of local rivers and lakes. Don't risk it with random brands, it is better to choose proven gear that cares about the satisfaction of searcher.

Advantages and disadvantages of neodymium magnets.

Benefits

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
  • Neodymium magnets are remarkably resistant to loss of magnetic properties caused by magnetic disturbances,
  • A magnet with a shiny silver surface has better aesthetics,
  • Magnetic induction on the working part of the magnet remains extremely intense,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Possibility of custom forming and modifying to concrete applications,
  • Wide application in high-tech industry – they serve a role in data components, drive modules, precision medical tools, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which makes them useful in compact constructions

Cons

Disadvantages of neodymium magnets:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
  • 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.
  • They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in producing threads and complicated shapes in magnets, we recommend using cover - magnetic mount.
  • Potential hazard resulting from small fragments of magnets are risky, if swallowed, which becomes key in the context of child safety. It is also worth noting that tiny parts of these magnets can be problematic in diagnostics medical after entering the body.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities

Pull force analysis

Highest magnetic holding force – what it depends on?

The lifting capacity listed is a theoretical maximum value conducted under specific, ideal conditions:
  • on a block made of mild steel, effectively closing the magnetic field
  • with a cross-section of at least 10 mm
  • characterized by smoothness
  • under conditions of no distance (metal-to-metal)
  • under perpendicular force vector (90-degree angle)
  • at ambient temperature approx. 20 degrees Celsius

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the magnet holding may be lower influenced by the following factors, starting with the most relevant:
  • Clearance – the presence of any layer (paint, dirt, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (typically approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Material composition – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
  • Smoothness – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
  • Thermal factor – high temperature reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, however under shearing force the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

Safe handling of NdFeB magnets
Choking Hazard

Product intended for adults. Small elements pose a choking risk, causing serious injuries. Keep out of reach of children and animals.

Respect the power

Use magnets with awareness. Their immense force can surprise even professionals. Plan your moves and do not underestimate their force.

Mechanical processing

Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this risks ignition.

Crushing force

Big blocks can smash fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Warning for allergy sufferers

Medical facts indicate that nickel (the usual finish) is a strong allergen. If you have an allergy, refrain from direct skin contact and select coated magnets.

Impact on smartphones

A powerful magnetic field disrupts the operation of magnetometers in smartphones and GPS navigation. Do not bring magnets close to a smartphone to prevent breaking the sensors.

Magnets are brittle

Neodymium magnets are sintered ceramics, which means they are fragile like glass. Impact of two magnets will cause them shattering into shards.

Maximum temperature

Avoid heat. Neodymium magnets are sensitive to temperature. If you need resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Protect data

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

Medical interference

Warning for patients: Strong magnetic fields disrupt medical devices. Keep minimum 30 cm distance or ask another person to work with the magnets.

Danger! Want to know more? Check our post: Are neodymium magnets dangerous?