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UMP 135x40 [M10+M12] GW F600 Lina / N38 - search holder

search holder

Catalog no 210385

GTIN/EAN: 5906301814047

5.00

Diameter Ø

135 mm [±1 mm]

Height

40 mm [±1 mm]

Weight

4300 g

Load capacity

680.00 kg / 6668.52 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 10 000 Gauss [±5%]

product specifications »

649.99 ZŁ with VAT / pcs + price for transport

528.45 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
Do you have purchase concerns?

Pick up the phone and ask +48 888 99 98 98 or let us know via contact form our website.
Weight along with shape of a magnet can be verified with our our magnetic calculator.

Same-day shipping for orders placed before 14:00.

💡 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 135x40 [M10+M12] GW F600 Lina / N38 - search holder

Specification / characteristics - UMP 135x40 [M10+M12] GW F600 Lina / N38 - search holder

properties
properties values
Cat. no. 210385
GTIN/EAN 5906301814047
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 135 mm [±1 mm]
Height 40 mm [±1 mm]
Weight 4300 g
Load capacity ~ ? 680.00 kg / 6668.52 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 3xM10
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 135x40 [M10+M12] GW F600 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: 210385-2026
Measurement Calculator
Magnet pull force
Magnetic Field
Type your figure in a box, to see the rest will convert automatically.

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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. Model UMP 135x40 [M10+M12] GW F600 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. The side eyelet ensures the magnet doesn't stand sideways or "on edge" during pulling. 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. Despite solid construction, neodymium is a brittle material and can chip upon very strong impact (e.g., against concrete). 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). We often add thread glue to secure the eyelet against unscrewing in water. 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. 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.
Possessing and using a neodymium magnet to clean the bottom is generally legal, provided you are not searching for artifacts protected by law. We recommend familiarizing yourself with current local regulations and heritage protection laws.
In contrast to many market offers, Dhit does not cut corners on materials, which translates into a better results during treasure hunting.
Consequently, despite the market price, the lifespan of the Dhit product puts it a step above other brands.
It is worth remembering that the identical magnet used by the lateral point often has only 40 kg of strength instead of the promised 200 kg. Interestingly, in the web, there are virtually no recordings testing the actual strength of competitor products on the lateral attachment.
{By choosing Dhit, you support a local market leader that knows the conditions of local rivers and lakes. Every product is individually inspected before shipping, which ensures that you receive equipment of the defect-free.

Pros as well as cons of rare earth magnets.

Advantages

Besides their stability, neodymium magnets are valued for these benefits:
  • They retain magnetic properties for around 10 years – the loss is just ~1% (according to analyses),
  • Neodymium magnets are remarkably resistant to demagnetization caused by external magnetic fields,
  • In other words, due to the smooth surface of silver, the element gains a professional look,
  • Magnetic induction on the working layer of the magnet is extremely intense,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures reaching 230°C and above...
  • Thanks to the possibility of accurate forming and adaptation to custom solutions, neodymium magnets can be manufactured in a broad palette of shapes and sizes, which expands the range of possible applications,
  • Key role in high-tech industry – they are utilized in magnetic memories, electromotive mechanisms, precision medical tools, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in miniature devices

Limitations

Drawbacks and weaknesses of neodymium magnets and ways of using them
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a steel housing, which not only protects them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in power. 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
  • When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in producing nuts and complex forms in magnets, we propose using casing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets pose a threat, if swallowed, which becomes key in the context of child safety. It is also worth noting that small elements of these products can be problematic in diagnostics medical in case of swallowing.
  • Due to neodymium price, their price is higher than average,

Lifting parameters

Maximum lifting force for a neodymium magnet – what affects it?

The specified lifting capacity refers to the limit force, measured under optimal environment, namely:
  • using a plate made of low-carbon steel, functioning as a ideal flux conductor
  • with a thickness minimum 10 mm
  • characterized by smoothness
  • under conditions of ideal adhesion (metal-to-metal)
  • during detachment in a direction vertical to the plane
  • in neutral thermal conditions

Impact of factors on magnetic holding capacity in practice

Effective lifting capacity is affected by working environment parameters, mainly (from priority):
  • Gap between magnet and steel – every millimeter of separation (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Direction of force – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin sheet causes magnetic saturation, causing part of the flux to be wasted into the air.
  • Metal type – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases force. Uneven metal reduce efficiency.
  • Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under perpendicular forces, whereas under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the holding force.

Safety rules for work with neodymium magnets
Implant safety

People with a ICD have to maintain an large gap from magnets. The magnetism can disrupt the operation of the life-saving device.

Conscious usage

Handle magnets consciously. Their powerful strength can shock even experienced users. Stay alert and do not underestimate their force.

Serious injuries

Large magnets can crush fingers in a fraction of a second. Do not put your hand betwixt two strong magnets.

Threat to navigation

Be aware: rare earth magnets generate a field that interferes with sensitive sensors. Keep a separation from your phone, device, and GPS.

Beware of splinters

NdFeB magnets are sintered ceramics, meaning they are very brittle. Clashing of two magnets leads to them breaking into small pieces.

Fire risk

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

Operating temperature

Regular neodymium magnets (grade N) lose power when the temperature surpasses 80°C. The loss of strength is permanent.

Danger to the youngest

Product intended for adults. Tiny parts can be swallowed, causing severe trauma. Keep out of reach of children and animals.

Sensitization to coating

Nickel alert: The Ni-Cu-Ni coating contains nickel. If skin irritation appears, immediately stop handling magnets and use protective gear.

Protect data

Avoid bringing magnets near a wallet, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.

Warning! Learn more about hazards in the article: Safety of working with magnets.