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AM Magnetyczny zbieracz / N38 - magnetic accessories

magnetic accessories

Catalog no 080499

Magnetization Direction

↑ axial

Coating

[NiCuNi] Nickel

1.230 with VAT / pcs + price for transport

1.000 ZŁ net + 23% VAT / pcs

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Technical details - AM Magnetyczny zbieracz / N38 - magnetic accessories

Specification / characteristics - AM Magnetyczny zbieracz / N38 - magnetic accessories

properties
properties values
Cat. no. 080499
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Magnetization Direction ↑ axial
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics AM Magnetyczny zbieracz / N38 - magnetic accessories
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
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%
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: 080499-2026
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Pulling force

Magnetic Field

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You will find essential equipment here for building professional mounting systems. We offer, among others: various types of hooks, eyelet holders, mounting plates for magnets, and rubber covers. Thanks to these additions, you can adapt any magnetic holder to your individual needs.
The plate serves as a base (armature) to which the magnet will attach. Just stick the plate in the chosen place using strong 3M tape (often included). This enables creating magnetic closures anywhere in the home and office.
Tips fit sockets with thread M3, M4, M5, M6, M8, M10, M12, etc. Information about thread size (e.g., M4) can be found in the title and product specification. Most elements are protected against rust by galvanic zinc.
Rubber caps perform a protective function (against scratches) and anti-slip. Use them wherever direct metal contact could damage the surface. An additional layer of rubber weakens attraction slightly but drastically increases shear force (sliding resistance).
Yes, as a direct importer, we serve both retail and wholesale customers. For larger orders, we offer attractive discounts and individual quotes. We guarantee continuity of supply and high quality of fasteners.

Advantages and disadvantages of neodymium magnets.

Strengths

Apart from their superior magnetism, neodymium magnets have these key benefits:
  • They have constant strength, and over more than 10 years their attraction force decreases symbolically – ~1% (in testing),
  • Magnets very well protect themselves against demagnetization caused by foreign field sources,
  • By covering with a shiny coating of nickel, the element acquires an professional look,
  • The surface of neodymium magnets generates a intense magnetic field – this is a distinguishing feature,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of custom forming and optimizing to complex needs,
  • Universal use in modern technologies – they serve a role in hard drives, electric drive systems, precision medical tools, and other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Limitations

Disadvantages of NdFeB magnets:
  • At very strong impacts they can break, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
  • They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in producing nuts and complicated forms in magnets, we recommend using cover - magnetic mechanism.
  • Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these products are able to complicate diagnosis medical when they are in the body.
  • Due to complex production process, their price is relatively high,

Holding force characteristics

Detachment force of the magnet in optimal conditionswhat affects it?

The specified lifting capacity represents the maximum value, obtained under laboratory conditions, specifically:
  • with the use of a yoke made of special test steel, ensuring maximum field concentration
  • possessing a thickness of at least 10 mm to avoid saturation
  • characterized by lack of roughness
  • under conditions of gap-free contact (surface-to-surface)
  • during detachment in a direction perpendicular to the mounting surface
  • in neutral thermal conditions

Practical aspects of lifting capacity – factors

Real force is influenced by working environment parameters, including (from most important):
  • Clearance – the presence of any layer (rust, dirt, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Angle of force application – highest force is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Plate material – mild steel attracts best. Alloy admixtures lower magnetic permeability and lifting capacity.
  • Smoothness – ideal contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
  • Thermal factor – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast 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.

Precautions when working with neodymium magnets
Choking Hazard

Always keep magnets out of reach of children. Choking hazard is significant, and the consequences of magnets clamping inside the body are life-threatening.

Physical harm

Large magnets can break fingers instantly. Never place your hand betwixt two attracting surfaces.

Danger to pacemakers

Medical warning: Neodymium magnets can deactivate heart devices and defibrillators. Stay away if you have electronic implants.

Sensitization to coating

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If skin irritation appears, immediately stop working with magnets and use protective gear.

Cards and drives

Data protection: Strong magnets can damage data carriers and delicate electronics (heart implants, medical aids, timepieces).

Material brittleness

NdFeB magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets leads to them breaking into small pieces.

Handling rules

Exercise caution. Neodymium magnets attract from a long distance and snap with massive power, often quicker than you can move away.

Heat sensitivity

Avoid heat. NdFeB magnets are sensitive to temperature. If you need operation above 80°C, look for HT versions (H, SH, UH).

Flammability

Mechanical processing of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Precision electronics

A powerful magnetic field interferes with the functioning of magnetometers in smartphones and navigation systems. Keep magnets near a device to prevent damaging the sensors.

Caution! Looking for details? Check our post: Are neodymium magnets dangerous?