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

magnetic holder with hook

Catalog no 310424

GTIN/EAN: 5906301814535

5.00
Load capacity 7.50 kg / 73.55 N
Diameter Ø
16 mm [±1 mm]
Height
32 mm [±1 mm]
Height
5 mm [±1 mm]
Weight
12 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
technical details »

4.88 zł with VAT / pcs + price for transport

3.97 zł net + 23% VAT / pcs

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Technical of the product - 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

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%

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: 310424-2026
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A hook magnet is an ideal solution for quick mounting of banners, signs, and markings on steel ceiling structures. In workshops and garages, they work perfectly for guiding cables or hanging work lighting.
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.
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. The housing ensures mechanical durability, which is important in industrial and assembly conditions.
Standard holders are coated with a layer of nickel or zinc, which protects them from corrosion indoors. Metal elements can rust with constant contact with atmospheric moisture.

Pros as well as cons of Nd2Fe14B magnets.

Strengths

Apart from their notable holding force, neodymium magnets have these key benefits:
  • They do not lose magnetism, even after nearly ten years – the decrease in power is only ~1% (theoretically),
  • Neodymium magnets are exceptionally resistant to demagnetization caused by external interference,
  • The use of an metallic layer of noble metals (nickel, gold, silver) causes the element to look better,
  • Magnets exhibit huge magnetic induction on the active area,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Considering the ability of free shaping and adaptation to custom requirements, NdFeB magnets can be created in a wide range of geometric configurations, which increases their versatility,
  • Versatile presence in high-tech industry – they are utilized in mass storage devices, motor assemblies, medical devices, and other advanced devices.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Cons

Disadvantages of neodymium magnets:
  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • Neodymium magnets demagnetize 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
  • They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Limited possibility of producing threads in the magnet and complex forms - recommended is casing - magnetic holder.
  • Health risk resulting from small fragments of magnets are risky, if swallowed, which becomes key in the context of child safety. Additionally, small elements of these products can be problematic in diagnostics medical after entering the body.
  • Due to neodymium price, their price exceeds standard values,

Lifting parameters

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

Holding force of 7.50 kg is a theoretical maximum value conducted under the following configuration:
  • on a block made of mild steel, perfectly concentrating the magnetic flux
  • whose transverse dimension is min. 10 mm
  • with an polished touching surface
  • under conditions of no distance (metal-to-metal)
  • for force applied at a right angle (pull-off, not shear)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

Real force is affected by specific conditions, mainly (from priority):
  • Distance (betwixt the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to varnish, rust or dirt).
  • Loading method – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (typically approx. 20-30% of nominal force).
  • Plate thickness – too thin sheet does not close the flux, causing part of the power to be wasted to the other side.
  • Material composition – different alloys reacts the same. High carbon content worsen the attraction effect.
  • Base smoothness – the smoother and more polished the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal factor – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was assessed with the use of a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, however under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet’s surface and the plate decreases the load capacity.

Safe handling of neodymium magnets
Immense force

Before use, read the rules. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Beware of splinters

Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Allergic reactions

Medical facts indicate that nickel (the usual finish) is a common allergen. For allergy sufferers, avoid direct skin contact and opt for coated magnets.

Choking Hazard

Product intended for adults. Tiny parts can be swallowed, causing intestinal necrosis. Store away from children and animals.

ICD Warning

Life threat: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Hand protection

Pinching hazard: The pulling power is so immense that it can cause blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Heat warning

Watch the temperature. Exposing the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.

GPS and phone interference

Be aware: rare earth magnets generate a field that interferes with precision electronics. Keep a separation from your mobile, device, and navigation systems.

Keep away from computers

Avoid bringing magnets near a purse, computer, or screen. The magnetism can destroy these devices and wipe information from cards.

Machining danger

Fire warning: Neodymium dust is highly flammable. Do not process magnets without safety gear as this risks ignition.

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