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UMH 42x9x46 [M6] / N38 - magnetic holder with hook

magnetic holder with hook

Catalog no 310429

GTIN/EAN: 5906301814580

5.00

Diameter Ø

42 mm [±1 mm]

Height

46 mm [±1 mm]

Height

9 mm [±1 mm]

Weight

90 g

Magnetization Direction

↑ axial

Load capacity

66.00 kg / 647.24 N

Coating

[NiCuNi] Nickel

see parameters »

35.99 ZŁ with VAT / pcs + price for transport

29.26 ZŁ net + 23% VAT / pcs

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Force along with form of a neodymium magnet can be calculated on our power calculator.

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Technical parameters - UMH 42x9x46 [M6] / N38 - magnetic holder with hook

Specification / characteristics - UMH 42x9x46 [M6] / N38 - magnetic holder with hook

properties
properties values
Cat. no. 310429
GTIN/EAN 5906301814580
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 42 mm [±1 mm]
Height 46 mm [±1 mm]
Height 9 mm [±1 mm]
Weight 90 g
Magnetization Direction ↑ axial
Load capacity ~ ? 66.00 kg / 647.24 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMH 42x9x46 [M6] / N38 - magnetic holder with hook
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: 310429-2026
Measurement Calculator
Pulling force
Field Strength
Just complete any input, and the calculator compute the rest automatically.

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Holders with a hook are indispensable in large-format stores and warehouses for suspending advertisements (POS systems). You can use them to organize wires, hang tools, or clothes on metal racks.
Yes, the hook is an element screwed into a bushing with a metric thread (e.g., M4, M5, M6 - check description). Thanks to this, one magnet can perform many functions - sometimes be a hook, and sometimes a holder for a bolt.
The given value defines the maximum load when suspended under a thick, horizontal ceiling beam. For heavy ceiling ads or tools, we recommend choosing a magnet with a considerable power reserve.
The steel housing (cup) shields the magnetic field, directing all its power downwards, onto the contact surface. Additionally, steel protects the brittle magnet from cracking upon hitting the ceiling or beam.
For outdoor use (in rain), metal hangers may eventually develop a rusty coating over time. If you are looking for an outdoor hanger, choose a model in rubberized or plastic housing, which is tight.

Strengths as well as weaknesses of neodymium magnets.

Pros

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They retain magnetic properties for almost 10 years – the loss is just ~1% (based on simulations),
  • They are resistant to demagnetization induced by external magnetic fields,
  • A magnet with a shiny gold surface has an effective appearance,
  • Neodymium magnets deliver maximum magnetic induction on a small 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 shape) at temperatures up to 230°C and above...
  • Possibility of detailed forming and optimizing to defined needs,
  • Wide application in electronics industry – they are used in magnetic memories, motor assemblies, precision medical tools, also complex engineering applications.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which enables their usage in miniature devices

Cons

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals
  • They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
  • NdFeB magnets lose strength 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 corrode. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in creating threads and complicated forms in magnets, we propose using cover - magnetic mechanism.
  • Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these products can be problematic in diagnostics medical when they are in the body.
  • Due to expensive raw materials, their price is higher than average,

Holding force characteristics

Maximum magnetic pulling force – what contributes to it?

Magnet power was determined for optimal configuration, including:
  • with the application of a yoke made of special test steel, guaranteeing full magnetic saturation
  • with a thickness of at least 10 mm
  • with an polished contact surface
  • with total lack of distance (without impurities)
  • under vertical force vector (90-degree angle)
  • at ambient temperature room level

Key elements affecting lifting force

In real-world applications, the actual lifting capacity depends on several key aspects, ranked from most significant:
  • Gap (between the magnet and the plate), as even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Angle of force application – maximum parameter is reached only during perpendicular pulling. The shear force of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material composition – different alloys attracts identically. Alloy additives worsen the attraction effect.
  • Surface quality – the smoother and more polished the surface, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
  • Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet’s surface and the plate lowers the lifting capacity.

Warnings
Magnetic interference

GPS units and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Mechanical processing

Powder generated during grinding of magnets is combustible. Do not drill into magnets unless you are an expert.

Hand protection

Pinching hazard: The pulling power is so immense that it can result in hematomas, crushing, and broken bones. Use thick gloves.

Life threat

Individuals with a pacemaker must keep an large gap from magnets. The magnetism can disrupt the functioning of the life-saving device.

Allergic reactions

Studies show that nickel (standard magnet coating) is a potent allergen. If your skin reacts to metals, prevent direct skin contact or opt for coated magnets.

Maximum temperature

Avoid heat. Neodymium magnets are susceptible to temperature. If you require resistance above 80°C, inquire about HT versions (H, SH, UH).

This is not a toy

Only for adults. Tiny parts pose a choking risk, leading to severe trauma. Keep away from children and animals.

Electronic devices

Avoid bringing magnets near a purse, computer, or screen. The magnetism can permanently damage these devices and erase data from cards.

Risk of cracking

NdFeB magnets are ceramic materials, which means they are very brittle. Clashing of two magnets will cause them shattering into shards.

Handling guide

Be careful. Neodymium magnets attract from a long distance and connect with huge force, often faster than you can react.

Attention! More info about hazards in the article: Magnet Safety Guide.