← previous
next →
Product available Ships today (order by 14:00)

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%]

product details »

370.00 ZŁ with VAT / pcs + price for transport

300.81 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
300.81 ZŁ
370.00 ZŁ
price from 5 pcs
282.76 ZŁ
347.80 ZŁ
price from 10 pcs
264.71 ZŁ
325.60 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Need help making a decision?

Call us +48 22 499 98 98 or drop us a message using form through our site.
Strength and appearance of a neodymium magnet can be checked on our force 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 data - 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
Technical and environmental data
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%
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: 210383-2026
Measurement Calculator
Force (pull)
Magnetic Induction
Simply populate any input, and the converter compute everything else instantly.

See more offers

SMZR 25x250 / N52 - magnetic separator with handle
Product available Ships today (order by 14:00)

SMZR 25x250 / N52 - magnetic separator with handle

676.50 ZŁ brutto / pcs
MW 12x50 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 12x50 / N38 - cylindrical magnet

28.29 ZŁ brutto / pcs
MW 29x10 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 29x10 / N38 - cylindrical magnet

17.34 ZŁ brutto / pcs
MPL 40x15x6 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 40x15x6 / N38 - lamellar magnet

18.45 ZŁ brutto / pcs
The best choice are magnets in thick, chrome-plated housings dedicated to water applications. 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.
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). Single-sided magnets are usually lighter and cheaper but less effective for long throws.
This construction protects the brittle neodymium from direct impact against stones and the bottom. 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.
We offer both standalone holders and ready-made gift sets (depending on the selected option in the store). In the package, you will find everything needed: strong rope (e.g., 20m), gloves, and hardware. We recommend always securing the thread with glue or tightening the eyelet firmly before first use.
This force applies to perfect adherence with the entire surface to a smooth, clean steel plate with a min. thickness of 20mm. Dirt, rust, paint, and algae create a distance that weakens the magnet by even 70-80%. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.
Possessing and using a neodymium magnet to clean the bottom is generally legal, provided you are not searching for artifacts protected by law. Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.
Unlike many market offers, Dhit does not cut corners on materials, which translates into a better results during treasure hunting.
As a result, despite the market price, the mechanical durability of the GOLD mount puts it far ahead of other brands.
Many sellers employ a tactic by promoting the pull force measured exclusively on the vertical mount. GOLD mounts focuses on honest data by stating the real parameters of the gear, so you avoid disappointment during real field work.
{By choosing GOLD mounts, you support a local market leader that knows the specifics of local rivers and lakes. Instead of risking with unknown goods, stick with the market leader that cares about the satisfaction of searcher.

Pros and cons of neodymium magnets.

Strengths

Besides their stability, neodymium magnets are valued for these benefits:
  • They do not lose power, even after approximately ten years – the drop in strength is only ~1% (theoretically),
  • They possess excellent resistance to magnetism drop as a result of external magnetic sources,
  • A magnet with a smooth nickel surface is more attractive,
  • Magnetic induction on the surface of the magnet remains exceptional,
  • Neodymium magnets are characterized by very 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...
  • Thanks to the potential of accurate shaping and adaptation to individualized requirements, magnetic components can be produced in a variety of shapes and sizes, which amplifies use scope,
  • Huge importance in innovative solutions – they are utilized in magnetic memories, electric motors, advanced medical instruments, also other advanced devices.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

Characteristics of disadvantages of neodymium magnets: tips and applications.
  • At very strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of making threads in the magnet and complex shapes - recommended is casing - magnet mounting.
  • Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. It is also worth noting that small components of these products are able to complicate diagnosis medical when they are in the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Pull force analysis

Breakaway strength of the magnet in ideal conditions – what affects it?

The declared magnet strength concerns the peak performance, recorded under optimal environment, meaning:
  • using a plate made of low-carbon steel, functioning as a ideal flux conductor
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with an polished contact surface
  • with direct contact (without coatings)
  • under perpendicular application of breakaway force (90-degree angle)
  • at standard ambient temperature

Determinants of practical lifting force of a magnet

Effective lifting capacity impacted by working environment parameters, mainly (from most important):
  • Clearance – the presence of any layer (paint, tape, gap) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet holds much less (typically approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material composition – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
  • Smoothness – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity was determined by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate decreases the load capacity.

Safe handling of neodymium magnets
Electronic devices

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

Dust is flammable

Mechanical processing of neodymium magnets poses a fire risk. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Permanent damage

Avoid heat. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, look for HT versions (H, SH, UH).

Threat to navigation

GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a strong magnet can decalibrate the internal compass in your phone.

Serious injuries

Big blocks can crush fingers in a fraction of a second. Never place your hand betwixt two strong magnets.

Handling rules

Handle magnets consciously. Their huge power can surprise even professionals. Be vigilant and respect their power.

Life threat

Individuals with a heart stimulator must maintain an safe separation from magnets. The magnetism can disrupt the functioning of the life-saving device.

Warning for allergy sufferers

Nickel alert: The Ni-Cu-Ni coating consists of nickel. If redness occurs, cease handling magnets and use protective gear.

Beware of splinters

NdFeB magnets are ceramic materials, meaning they are prone to chipping. Impact of two magnets leads to them cracking into shards.

This is not a toy

Product intended for adults. Tiny parts pose a choking risk, causing severe trauma. Store out of reach of children and animals.

Important! Details about hazards in the article: Safety of working with magnets.