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UMH 16x5x32 [M4] / N38 - magnetic holder with hook

magnetic holder with hook

Catalog no 310424

GTIN/EAN: 5906301814535

5.00

Diameter Ø

16 mm [±1 mm]

Height

32 mm [±1 mm]

Height

5 mm [±1 mm]

Weight

12 g

Magnetization Direction

↑ axial

Load capacity

7.50 kg / 73.55 N

Coating

[NiCuNi] Nickel

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4.88 ZŁ with VAT / pcs + price for transport

3.97 ZŁ net + 23% VAT / pcs

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Parameters along with appearance of a neodymium magnet can be analyzed on our magnetic mass calculator.

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Detailed specification - UMH 16x5x32 [M4] / N38 - magnetic holder with hook

Specification / characteristics - UMH 16x5x32 [M4] / N38 - magnetic holder with hook

properties
properties values
Cat. no. 310424
GTIN/EAN 5906301814535
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 16 mm [±1 mm]
Height 32 mm [±1 mm]
Height 5 mm [±1 mm]
Weight 12 g
Magnetization Direction ↑ axial
Load capacity ~ ? 7.50 kg / 73.55 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMH 16x5x32 [M4] / 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
Engineering data and GPSR
Material specification
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: 310424-2026
Measurement Calculator
Magnet pull force
Field Strength
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A hook magnet is an ideal solution for quick mounting of banners, signs, and markings on steel ceiling structures. You can use them to organize wires, hang tools, or clothes on metal racks.
The magnet has a standard threaded socket, which allows replacing the hook with any other accessory with a thread. 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 cup acts as a magnetic armature, intensifying the neodymium action and increasing efficiency. A bare magnet could crack upon sudden application to metal, and the holder is resistant to this.
Standard holders are coated with a layer of nickel or zinc, which protects them from corrosion indoors. If you are looking for an outdoor hanger, choose a model in rubberized or plastic housing, which is tight.

Strengths and weaknesses of rare earth magnets.

Advantages

In addition to their long-term stability, neodymium magnets provide the following advantages:
  • Their magnetic field remains stable, and after around ten years it decreases only by ~1% (according to research),
  • They have excellent resistance to weakening of magnetic properties when exposed to external fields,
  • By covering with a lustrous coating of silver, the element acquires an elegant look,
  • Magnets are distinguished by very high magnetic induction on the working surface,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of precise forming and optimizing to precise conditions,
  • Significant place in future technologies – they serve a role in mass storage devices, electric drive systems, precision medical tools, as well as industrial machines.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as 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 during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We recommend a housing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complicated shapes.
  • Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small components of these products can disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Highest magnetic holding force – what contributes to it?

The declared magnet strength refers to the maximum value, recorded under optimal environment, meaning:
  • using a base made of mild steel, functioning as a circuit closing element
  • whose transverse dimension reaches at least 10 mm
  • with an polished contact surface
  • with zero gap (no impurities)
  • during pulling in a direction vertical to the mounting surface
  • at ambient temperature approx. 20 degrees Celsius

Determinants of practical lifting force of a magnet

Please note that the magnet holding will differ depending on elements below, in order of importance:
  • Distance – existence of any layer (rust, dirt, air) acts as an insulator, which reduces capacity steeply (even by 50% at 0.5 mm).
  • Load vector – 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).
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Material type – the best choice is high-permeability steel. Hardened steels may have worse magnetic properties.
  • Plate texture – ground elements ensure maximum contact, which increases field saturation. Rough surfaces reduce efficiency.
  • Temperature influence – hot environment weakens pulling force. Too high temperature can permanently damage the magnet.

Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Warnings
Nickel allergy

It is widely known that the nickel plating (the usual finish) is a common allergen. If your skin reacts to metals, avoid direct skin contact or choose coated magnets.

Impact on smartphones

A strong magnetic field interferes with the operation of magnetometers in smartphones and navigation systems. Maintain magnets close to a device to prevent damaging the sensors.

Medical implants

People with a heart stimulator have to keep an absolute distance from magnets. The magnetism can stop the functioning of the life-saving device.

Crushing force

Risk of injury: The pulling power is so immense that it can cause hematomas, pinching, and even bone fractures. Protective gloves are recommended.

Respect the power

Handle with care. Neodymium magnets act from a long distance and snap with huge force, often faster than you can react.

Electronic hazard

Powerful magnetic fields can destroy records on credit cards, hard drives, and storage devices. Maintain a gap of at least 10 cm.

Permanent damage

Control the heat. Heating the magnet above 80 degrees Celsius will ruin its properties and pulling force.

Flammability

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

Magnet fragility

Neodymium magnets are sintered ceramics, meaning they are fragile like glass. Impact of two magnets leads to them shattering into small pieces.

Swallowing risk

Neodymium magnets are not suitable for play. Accidental ingestion of a few magnets may result in them pinching intestinal walls, which constitutes a critical condition and necessitates immediate surgery.

Caution! Details about risks in the article: Magnet Safety Guide.