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UMP 75x24 [M8+M10] GW F200 Lina / N38 - search holder

search holder

Catalog no 210382

GTIN/EAN: 5906301814016

5.00

Diameter Ø

75 mm [±1 mm]

Height

24 mm [±1 mm]

Weight

0.9 g

Load capacity

280.00 kg / 2745.86 N

Coating

[NiCuNi] Nickel

technical parameters »

230.00 ZŁ with VAT / pcs + price for transport

186.99 ZŁ net + 23% VAT / pcs

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Call us now +48 22 499 98 98 alternatively drop us a message by means of request form the contact form page.
Force along with shape of a neodymium magnet can be verified using our magnetic calculator.

Orders placed before 14:00 will be shipped the same business day.

💡 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!

Technical - UMP 75x24 [M8+M10] GW F200 Lina / N38 - search holder

Specification / characteristics - UMP 75x24 [M8+M10] GW F200 Lina / N38 - search holder

properties
properties values
Cat. no. 210382
GTIN/EAN 5906301814016
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 75 mm [±1 mm]
Height 24 mm [±1 mm]
Weight 0.9 g
Load capacity ~ ? 280.00 kg / 2745.86 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 75x24 [M8+M10] GW F200 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%
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: 210382-2026
Measurement Calculator
Force (pull)
Magnetic Induction
Put your value in a single field to generate results for all other units at once.

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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. This specific magnet ensures a laboratory lifting capacity of up to 280.00 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 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. Top mounting works well when fishing from a bridge, pier, or well (vertical technique). 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.
Most of our starter kits are complete and ready to use. In the package, you will find everything needed: strong rope (e.g., 20m), gloves, and hardware. 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. 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.
Searches are allowed as long as you do not interfere with archaeological sites or search for weapons. It is worth acting responsibly, cleaning up after yourself, and caring for the environment by removing fished-out scrap.
It is the best value because for the same money, you obtain a premium mount that will serve you for much longer than generic imports.
The GOLD series utilize heavy-duty, thick-walled steel that acts as a real armor for the brittle neodymium.
Many sellers employ a tactic by promoting the pull force tested only on the vertical mount. Interestingly, in the entire internet, there are virtually no videos demonstrating the actual strength of competitor products on the lateral attachment.
{In contrast to anonymous sellers, Dhit provides expert advice and real warranty help, which gives peace of mind after the transaction. Don't risk it with unknown goods, stick with proven gear that cares about the satisfaction of searcher.

Strengths and weaknesses of neodymium magnets.

Advantages

Besides their immense field intensity, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (according to literature),
  • Magnets perfectly resist against loss of magnetization caused by external fields,
  • The use of an refined finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
  • Neodymium magnets deliver maximum magnetic induction on a their surface, which ensures high operational effectiveness,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Thanks to freedom in shaping and the ability to customize to specific needs,
  • Significant place in modern industrial fields – they are commonly used in HDD drives, electric motors, diagnostic systems, and other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which allows their use in miniature devices

Weaknesses

Problematic aspects of neodymium magnets: weaknesses and usage proposals
  • To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power 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
  • Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • We recommend a housing - magnetic holder, due to difficulties in creating nuts inside the magnet and complicated shapes.
  • Health risk related to microscopic parts of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. Additionally, small components of these magnets can disrupt the diagnostic process medical when they are in the body.
  • Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Pull force analysis

Maximum holding power of the magnet – what affects it?

Magnet power is the result of a measurement for optimal configuration, assuming:
  • using a base made of mild steel, acting as a magnetic yoke
  • possessing a thickness of minimum 10 mm to avoid saturation
  • with an ideally smooth contact surface
  • under conditions of no distance (metal-to-metal)
  • for force applied at a right angle (pull-off, not shear)
  • at room temperature

Practical lifting capacity: influencing factors

During everyday use, the actual lifting capacity is determined by many variables, listed from the most important:
  • Air gap (between the magnet and the metal), because even a tiny distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
  • Angle of force application – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin sheet causes magnetic saturation, causing part of the power to be wasted into the air.
  • Steel grade – ideal substrate is pure iron steel. Stainless steels may have worse magnetic properties.
  • Surface condition – smooth surfaces guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
  • Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the holding force is lower. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.

Safety rules for work with neodymium magnets
Do not drill into magnets

Powder created during cutting of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Safe distance

Data protection: Strong magnets can damage payment cards and sensitive devices (heart implants, medical aids, mechanical watches).

Impact on smartphones

Remember: neodymium magnets generate a field that interferes with sensitive sensors. Keep a safe distance from your phone, tablet, and GPS.

This is not a toy

Only for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Store out of reach of children and animals.

Handling rules

Be careful. Neodymium magnets act from a distance and snap with huge force, often quicker than you can react.

Power loss in heat

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

Shattering risk

Beware of splinters. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Hand protection

Watch your fingers. Two large magnets will join instantly with a force of massive weight, crushing anything in their path. Be careful!

Allergy Warning

A percentage of the population suffer from a contact allergy to nickel, which is the common plating for neodymium magnets. Frequent touching can result in a rash. We suggest use safety gloves.

Health Danger

For implant holders: Powerful magnets affect electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.

Important! Learn more about risks in the article: Magnet Safety Guide.