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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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Specifications along with appearance of magnetic components can be estimated with our magnetic mass calculator.

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Technical - 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
Technical specification and ecology
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: 310424-2025
Measurement Calculator
Pulling force
Magnetic Induction
Input a value into any field, to see all other values convert in real-time.

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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.
The magnet has a standard threaded socket, which allows replacing the hook with any other accessory with a thread. Check the thread size in the product specification to select matching replacements.
You will get the greatest force by mounting the magnet on a thick, smooth steel surface vertically. When mounting on a wall (vertically), the holding force is much lower due to shear force (the magnet may slide).
Thanks to the metal cover, attraction force is concentrated, which significantly increases capacity compared to a bare magnet. Additionally, steel protects the brittle magnet from cracking upon hitting the ceiling or beam.
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.

Pros and cons of rare earth magnets.

Pros

Besides their high retention, neodymium magnets are valued for these benefits:
  • They retain attractive force for nearly 10 years – the loss is just ~1% (in theory),
  • Magnets perfectly protect themselves against demagnetization caused by ambient magnetic noise,
  • The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to present itself better,
  • Neodymium magnets deliver maximum magnetic induction on a small surface, which allows for strong attraction,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
  • Considering the potential of precise shaping and adaptation to unique solutions, magnetic components can be manufactured in a wide range of forms and dimensions, which expands the range of possible applications,
  • Significant place in modern technologies – they are used in data components, electric motors, advanced medical instruments, as well as technologically advanced constructions.
  • Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,

Weaknesses

What to avoid - cons of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a strong case, which not only protects them against impacts but also raises their durability
  • When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation as well as corrosion.
  • Limited ability of making nuts in the magnet and complex forms - recommended is a housing - magnet mounting.
  • Possible danger to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these products can be problematic in diagnostics medical when they are in the body.
  • Due to complex production process, their price is relatively high,

Lifting parameters

Breakaway strength of the magnet in ideal conditions – what it depends on?

Breakaway force was defined for ideal contact conditions, taking into account:
  • using a plate made of mild steel, functioning as a circuit closing element
  • with a cross-section no less than 10 mm
  • with an ideally smooth touching surface
  • without any clearance between the magnet and steel
  • during detachment in a direction perpendicular to the mounting surface
  • at conditions approx. 20°C

What influences lifting capacity in practice

Holding efficiency is affected by specific conditions, including (from priority):
  • Clearance – the presence of foreign body (rust, tape, air) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
  • Steel thickness – too thin sheet does not close the flux, causing part of the power to be lost into the air.
  • Plate material – mild steel attracts best. Alloy steels decrease magnetic permeability and holding force.
  • Surface finish – ideal contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Thermal factor – high temperature weakens pulling force. Too high temperature can permanently demagnetize the magnet.

Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the load capacity is reduced by as much as 5 times. In addition, even a small distance between the magnet and the plate decreases the holding force.

H&S for magnets
Danger to pacemakers

Warning for patients: Powerful magnets affect medical devices. Maintain minimum 30 cm distance or request help to work with the magnets.

Choking Hazard

Only for adults. Tiny parts can be swallowed, leading to severe trauma. Keep out of reach of children and animals.

Keep away from computers

Intense magnetic fields can destroy records on payment cards, HDDs, and storage devices. Stay away of min. 10 cm.

GPS and phone interference

An intense magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Maintain magnets near a smartphone to prevent damaging the sensors.

Immense force

Use magnets consciously. Their huge power can shock even experienced users. Be vigilant and do not underestimate their force.

Shattering risk

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may shatter into hazardous fragments.

Mechanical processing

Dust generated during cutting of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Sensitization to coating

It is widely known that the nickel plating (standard magnet coating) is a potent allergen. If you have an allergy, avoid touching magnets with bare hands and choose encased magnets.

Pinching danger

Danger of trauma: The attraction force is so immense that it can cause hematomas, pinching, and broken bones. Use thick gloves.

Maximum temperature

Keep cool. Neodymium magnets are sensitive to heat. If you require resistance above 80°C, look for HT versions (H, SH, UH).

Important! Learn more about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98