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UMP 97x40 [M8+M10] GW F300 kg / N38 - search holder

search holder

Catalog no 210337

GTIN/EAN: 5906301813965

5.00
Load capacity 380.00 kg / 3726.53 N
Diameter Ø
97 mm [±1 mm]
Height
40 mm [±1 mm]
Weight
2200 g
Coating
[NiCuNi] Nickel
Magnetic Flux
~ 10 000 Gauss [±5%]
technical specifications »

243.90 zł net / pcs

300.00 zł with VAT (23% VAT) / pcs

price for transport

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Frequently asked questions

How much will a magnetic holder hold in practice?
The catalogue value assumes full contact with smooth steel at least 10 mm thick and a perpendicular pull. Thinner sheet, paint, rust and surface irregularities reduce it considerably: on 1 mm sheet about half remains. Lifting and vertical mounting call for an additional safety margin.
Will a holder work on stainless steel?
Not on austenitic grades 304 and 316 — they are effectively non-magnetic. It will not work on aluminium, copper or brass either. Those materials need a mechanical gripper.
Which coating for which conditions?
Nickel-copper-nickel (NiCuNi) is the standard and covers most applications. Epoxy is used for damp environments and outdoor work, zinc is sufficient for dry interiors. Holders in a steel housing or in rubber also protect the magnet against impact.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power 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!

Technical - UMP 97x40 [M8+M10] GW F300 kg / N38 - search holder

Specification / characteristics - UMP 97x40 [M8+M10] GW F300 kg / N38 - search holder

properties
properties values
Cat. no. 210337
GTIN/EAN 5906301813965
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%]
Size/Mount Quantity 2xM8/1xM10
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 97x40 [M8+M10] GW F300 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 310 °C
Curie Temperature TF 590 °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

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%

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: 210337-2026
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It is worth betting on proven F200, F300, or F550 models from our offer, which guarantee real power. This specific magnet ensures a laboratory lifting capacity of up to 380.00 kg, which translates into high effectiveness in water. The choice depends on whether you plan to throw from the shore (double-sided) or from a bridge (single-sided).
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). 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. Avoid throwing the magnet against bridge pillars or hard obstacles. After each fishing trip, we recommend rinsing the magnet with fresh water and drying it.
Check the product title and description to see if you are buying just the magnet or the XL set. 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.
The capacity given in the name (e.g., 380.00 kg) is the maximum value measured in laboratory conditions. 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.
If you find a dangerous object (unexploded ordnance) or an antique, you have a legal obligation to report it to appropriate services (Police, conservator). Magnet fishing is an eco-friendly hobby if you clean the river from trash and scrap.
By choosing Dhit GOLD mounts, you receive a higher quality standard and real N52 grade for the same market price.
Most magnets on the market have thin casings that crack during the first hard impact against concrete or rocks.
It is worth remembering that the identical mount used by the lateral point can actually show as little as a fraction of strength instead of the promised 200 kg. GOLD mounts focuses on honest data by stating the actual capabilities of the magnet, so you can be sure during real field work.
{Unlike competitors importing from China, Dhit provides full support and real warranty help, which is crucial after the transaction. Every mount is checked before shipping, which guarantees that you the set will be of the highest quality.

Strengths as well as weaknesses of rare earth magnets.

Advantages

Besides their immense field intensity, neodymium magnets offer the following advantages:
  • They have stable power, and over around 10 years their performance decreases symbolically – ~1% (in testing),
  • They have excellent resistance to magnetism drop due to external magnetic sources,
  • By covering with a shiny coating of gold, the element gains an elegant look,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Possibility of exact creating and modifying to concrete requirements,
  • Huge importance in advanced technology sectors – they find application in computer drives, electromotive mechanisms, advanced medical instruments, also industrial machines.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Characteristics of disadvantages of neodymium magnets: tips and applications.
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a steel housing, which not only protects them against impacts but also increases their durability
  • Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • They oxidize in a humid environment - during use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in producing threads and complex shapes in magnets, we recommend using casing - magnetic holder.
  • Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices are able to complicate diagnosis medical when they are in the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what affects it?

Breakaway force was determined for optimal configuration, assuming:
  • using a base made of mild steel, acting as a ideal flux conductor
  • with a thickness no less than 10 mm
  • with an ideally smooth touching surface
  • under conditions of no distance (metal-to-metal)
  • during detachment in a direction vertical to the plane
  • at ambient temperature room level

Practical lifting capacity: influencing factors

In practice, the real power depends on a number of factors, ranked from the most important:
  • Clearance – the presence of foreign body (rust, tape, gap) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Angle of force application – highest force is available only during pulling at a 90° angle. The shear force of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Base massiveness – insufficiently thick steel does not close the flux, causing part of the flux to be escaped to the other side.
  • Steel grade – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
  • Surface finish – ideal contact is obtained only on polished steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance between the magnet and the plate decreases the lifting capacity.

Precautions when working with neodymium magnets
Dust explosion hazard

Machining of neodymium magnets carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Magnet fragility

Protect your eyes. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.

Magnetic media

Powerful magnetic fields can corrupt files on payment cards, hard drives, and storage devices. Maintain a gap of min. 10 cm.

Skin irritation risks

A percentage of the population suffer from a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Frequent touching might lead to a rash. We recommend use safety gloves.

Do not give to children

Neodymium magnets are not suitable for play. Eating multiple magnets can lead to them attracting across intestines, which constitutes a direct threat to life and requires immediate surgery.

ICD Warning

Patients with a pacemaker should keep an absolute distance from magnets. The magnetic field can stop the functioning of the life-saving device.

GPS and phone interference

Remember: neodymium magnets produce a field that disrupts sensitive sensors. Maintain a safe distance from your phone, tablet, and GPS.

Permanent damage

Control the heat. Exposing the magnet to high heat will destroy its properties and pulling force.

Hand protection

Large magnets can break fingers in a fraction of a second. Never place your hand betwixt two strong magnets.

Do not underestimate power

Exercise caution. Rare earth magnets attract from a long distance and snap with huge force, often quicker than you can move away.

Security! Details about hazards in the article: Magnet Safety Guide.