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UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

search holder

Catalog no 210339

GTIN/EAN: 5906301813989

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%]

599.99 with VAT / pcs + price for transport

487.80 ZŁ net + 23% VAT / pcs

bulk discounts:

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Pick up the phone and ask +48 888 99 98 98 otherwise let us know through inquiry form our website.
Specifications along with appearance of a neodymium magnet can be verified using our our magnetic calculator.

Order by 14:00 and we’ll ship today!

💡 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!

Detailed specification - UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

Specification / characteristics - UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

properties
properties values
Cat. no. 210339
GTIN/EAN 5906301813989
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%]
Size/Mount Quantity 2xM10/1xM12
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 135x40 [M10+M12] GW F 600 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 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%
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: 210339-2026
Measurement Calculator
Force (pull)

Field Strength

Other offers

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. 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. Side mounting is ideal for throwing from the shore, as the magnet drags flat along the bottom. 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. 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). A full set usually contains: magnet, polypropylene rope with appropriate strength, protective gloves, hook, and carabiner. 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%. 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. We recommend familiarizing yourself with current local regulations and heritage protection laws.
By selecting the Dhit brand, you get a product of a significantly higher standard and real N52 grade for the same market price.
Consequently, despite the market price, the lifespan of the GOLD mount positions it far ahead of the competition.
Many distributors use a trick by advertising the power measured exclusively on the vertical mount. GOLD mounts guarantees honest data by stating the actual capabilities of the magnet, so you can be sure during treasure hunting.
{By choosing Dhit, you support a local market leader that knows the specifics of local rivers and lakes. Don't risk it with unknown goods, stick with proven gear that ensures the happiness of searcher.

Pros and cons of rare earth magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their power is durable, and after approximately 10 years it drops only by ~1% (according to research),
  • They have excellent resistance to magnetic field loss due to opposing magnetic fields,
  • By applying a lustrous coating of nickel, the element gains an aesthetic look,
  • Magnets are distinguished by extremely high magnetic induction on the surface,
  • Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
  • Due to the possibility of accurate molding and adaptation to specialized projects, neodymium magnets can be created in a variety of shapes and sizes, which amplifies use scope,
  • Significant place in innovative solutions – they are used in data components, electric motors, medical equipment, also industrial machines.
  • Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Drawbacks and weaknesses of neodymium magnets: weaknesses and usage proposals
  • They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
  • Limited possibility of producing nuts in the magnet and complicated shapes - recommended is casing - magnet mounting.
  • Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small elements of these devices can disrupt the diagnostic process medical in case of swallowing.
  • Due to complex production process, their price is higher than average,

Pull force analysis

Maximum holding power of the magnet – what affects it?

The lifting capacity listed is a result of laboratory testing executed under specific, ideal conditions:
  • using a sheet made of mild steel, acting as a circuit closing element
  • with a thickness no less than 10 mm
  • characterized by lack of roughness
  • under conditions of gap-free contact (metal-to-metal)
  • during detachment in a direction perpendicular to the mounting surface
  • at conditions approx. 20°C

Practical lifting capacity: influencing factors

In practice, the real power is determined by many variables, ranked from most significant:
  • Space between magnet and steel – every millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of nominal force).
  • Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
  • Steel grade – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
  • Surface structure – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal factor – high temperature weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was measured by applying a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate reduces the load capacity.

Precautions when working with NdFeB magnets
Crushing risk

Watch your fingers. Two large magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Exercise extreme caution!

Product not for children

Adult use only. Tiny parts can be swallowed, leading to serious injuries. Store away from kids and pets.

Safe operation

Before starting, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Permanent damage

Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Cards and drives

Data protection: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, hearing aids, timepieces).

Allergic reactions

It is widely known that nickel (standard magnet coating) is a strong allergen. If you have an allergy, prevent touching magnets with bare hands or opt for encased magnets.

Dust is flammable

Dust generated during cutting of magnets is self-igniting. Do not drill into magnets without proper cooling and knowledge.

Threat to navigation

A powerful magnetic field negatively affects the operation of magnetometers in phones and navigation systems. Keep magnets near a smartphone to avoid damaging the sensors.

ICD Warning

Individuals with a pacemaker must maintain an safe separation from magnets. The magnetic field can stop the operation of the implant.

Shattering risk

Protect your eyes. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.

Important! Need more info? Read our article: Are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98