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UMP 67x28 [M8+M10] GW F120 Lina / N38 - search holder

search holder

Catalog no 210381

GTIN/EAN: 5906301814009

5.00

Diameter Ø

67 mm [±1 mm]

Height

28 mm [±1 mm]

Weight

700 g

Load capacity

180.00 kg / 1765.20 N

Coating

[NiCuNi] Nickel

Magnetic Flux

~ 8 000 Gauss [±5%]

product specifications »

150.00 ZŁ with VAT / pcs + price for transport

121.95 ZŁ net + 23% VAT / pcs

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Call us +48 888 99 98 98 alternatively get in touch by means of request form the contact form page.
Lifting power and form of a magnet can be checked with our magnetic calculator.

Orders submitted before 14:00 will be dispatched today!

💡 Guide: How to choose a decent magnet and not get ripped off?

Instead of believing fairy tales on YouTube with tests on uncertified equipment, see what really determines your magnet's power:

  • 📏 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 specification - UMP 67x28 [M8+M10] GW F120 Lina / N38 - search holder

Specification / characteristics - UMP 67x28 [M8+M10] GW F120 Lina / N38 - search holder

properties
properties values
Cat. no. 210381
GTIN/EAN 5906301814009
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 67 mm [±1 mm]
Height 28 mm [±1 mm]
Weight 700 g
Load capacity ~ ? 180.00 kg / 1765.20 N
Coating [NiCuNi] Nickel
Holder Type 2 sided
Material Type Structural steel S235 (ferrous)
Magnetic Flux ~ 8 000 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 67x28 [M8+M10] GW F120 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
Technical specification and ecology
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%
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: 210381-2026
Measurement Calculator
Pulling force
Magnetic Induction
Put a figure in a single slot to see the conversion in all other units at once.

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The best choice are magnets in thick, chrome-plated housings dedicated to water applications. This specific magnet ensures a laboratory lifting capacity of up to 180.00 kg, which translates into high effectiveness in water. 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. Top mounting works well when fishing from a bridge, pier, or well (vertical technique). The double-sided version increases search efficiency by 100%.
Our holders have a thick steel housing covered with an anti-corrosion layer (chrome, nickel, zinc). Avoid throwing the magnet against bridge pillars or hard obstacles. Maintenance (e.g., WD-40) prevents surface corrosion of the steel housing.
Check the product title and description to see if you are buying just the magnet or the XL set. 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. 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.
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.
By choosing the Dhit brand, you receive a product of a significantly higher standard and real N52 grade for the average cost.
Most competitor mounts have weak shells that crack during the first hard impact against concrete or rocks.
Many distributors use a trick by advertising the power tested exclusively on the top hook. Crucially, in the web, it is hard to find videos testing the real side-pull force of other brands on the lateral attachment.
{Unlike competitors importing from China, Dhit provides expert advice and instant warranty help, which is crucial after the transaction. Instead of risking with random brands, it is better to choose proven gear that ensures the satisfaction of searcher.

Pros as well as cons of rare earth magnets.

Strengths

Besides their durability, neodymium magnets are valued for these benefits:
  • They retain attractive force for nearly 10 years – the loss is just ~1% (according to analyses),
  • They feature excellent resistance to weakening of magnetic properties when exposed to opposing magnetic fields,
  • In other words, due to the metallic finish of silver, the element looks attractive,
  • Magnetic induction on the working layer of the magnet is maximum,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • In view of the option of precise forming and customization to unique requirements, neodymium magnets can be produced in a wide range of geometric configurations, which increases their versatility,
  • Significant place in modern technologies – they are commonly used in hard drives, electromotive mechanisms, precision medical tools, as well as other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Cons

Drawbacks and weaknesses of neodymium magnets and proposals for their use:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend 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
  • We suggest cover - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated forms.
  • Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small elements of these magnets are able to disrupt the diagnostic process medical in case of swallowing.
  • With mass production the cost of neodymium magnets can be a barrier,

Lifting parameters

Highest magnetic holding force – what contributes to it?

Breakaway force was determined for the most favorable conditions, taking into account:
  • using a base made of mild steel, serving as a magnetic yoke
  • whose thickness equals approx. 10 mm
  • characterized by even structure
  • with zero gap (no paint)
  • during pulling in a direction perpendicular to the mounting surface
  • at room temperature

Determinants of practical lifting force of a magnet

Please note that the application force will differ influenced by the following factors, starting with the most relevant:
  • Clearance – the presence of any layer (paint, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Load vector – maximum parameter is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Plate thickness – too thin plate causes magnetic saturation, causing part of the power to be lost into the air.
  • Metal type – not every steel attracts identically. Alloy additives weaken the attraction effect.
  • Smoothness – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
  • Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was assessed using a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the holding force.

Precautions when working with neodymium magnets
Eye protection

Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Implant safety

Health Alert: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have electronic implants.

Keep away from children

Neodymium magnets are not toys. Eating multiple magnets may result in them connecting inside the digestive tract, which constitutes a direct threat to life and requires urgent medical intervention.

Power loss in heat

Avoid heat. NdFeB magnets are sensitive to heat. If you require operation above 80°C, inquire about HT versions (H, SH, UH).

Do not underestimate power

Handle magnets consciously. Their huge power can shock even experienced users. Plan your moves and do not underestimate their power.

Machining danger

Machining of NdFeB material poses a fire risk. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Threat to navigation

An intense magnetic field interferes with the operation of magnetometers in phones and navigation systems. Maintain magnets near a smartphone to prevent breaking the sensors.

Sensitization to coating

A percentage of the population suffer from a sensitization to Ni, which is the common plating for NdFeB magnets. Extended handling can result in dermatitis. We strongly advise wear safety gloves.

Crushing risk

Risk of injury: The pulling power is so great that it can result in blood blisters, pinching, and even bone fractures. Use thick gloves.

Safe distance

Data protection: Strong magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, timepieces).

Caution! Looking for details? Read our article: Why are neodymium magnets dangerous?