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AM Magnetyczny zbieracz / N38 - magnetic accessories

magnetic accessories

Catalog no 080499

Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
view technical specifications »

1.230 zł with VAT / pcs + price for transport

1.000 zł net + 23% VAT / pcs

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Product card - 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
Technical specification and ecology

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%

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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Force (pull)

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In this category, we offer a wide selection of complementary elements for magnetic holders. We offer, among others: various types of hooks, eye bolts (shackles), mounting plates for magnets, and rubber anti-slip caps. 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. Mounting consists of gluing or screwing the washer to a non-magnetic substrate. This enables creating magnetic closures anywhere in the home and office.
Elements are standardized according to metric standard, facilitating selection. Information about thread size (e.g., M4) can be found in the title and product specification. We offer accessories made of galvanized or stainless steel, resistant to corrosion.
The cap increases friction (coefficient of friction), preventing the magnet from sliding down a vertical wall. They are ideal when you want to attach a magnet to car paint, a fridge, or furniture. Surface safety comes at the cost of a small loss of nominal power.
Yes, as a direct importer, we serve both retail and wholesale customers. For B2B clients, we have special trade conditions and deferred payment terms. We guarantee continuity of supply and high quality of fasteners.

Pros and cons of neodymium magnets.

Strengths

Apart from their superior power, neodymium magnets have these key benefits:
  • They virtually do not lose power, because even after ten years the performance loss is only ~1% (according to literature),
  • They show high resistance to demagnetization induced by external magnetic fields,
  • By applying a smooth layer of nickel, the element has an modern look,
  • They feature high magnetic induction at the operating surface, which increases their power,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Considering the ability of precise molding and customization to individualized requirements, neodymium magnets can be created in a wide range of geometric configurations, which amplifies use scope,
  • Wide application in innovative solutions – they are commonly used in computer drives, motor assemblies, advanced medical instruments, as well as industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in small dimensions, which allows their use in small systems

Weaknesses

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • At 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 strength 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 durability 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
  • We suggest casing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complex forms.
  • Possible danger to health – tiny shards of magnets are risky, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, tiny parts of these devices can complicate diagnosis medical in case of swallowing.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Best holding force of the magnet in ideal parameters – what affects it?

Holding force of 0.00 kg is a measurement result performed under the following configuration:
  • with the use of a yoke made of special test steel, guaranteeing full magnetic saturation
  • whose transverse dimension reaches at least 10 mm
  • with an ideally smooth contact surface
  • without any air gap between the magnet and steel
  • during pulling in a direction vertical to the plane
  • at conditions approx. 20°C

Determinants of practical lifting force of a magnet

Bear in mind that the application force may be lower influenced by the following factors, starting with the most relevant:
  • Gap between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
  • Plate thickness – too thin sheet does not close the flux, causing part of the power to be wasted into the air.
  • Steel type – mild steel gives the best results. Higher carbon content reduce magnetic permeability and lifting capacity.
  • 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 environment – temperature increase results in weakening of induction. Check the maximum operating temperature for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, in contrast under parallel forces the holding force is lower. In addition, even a slight gap between the magnet and the plate reduces the holding force.

Safety rules for work with neodymium magnets
Heat warning

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.

Keep away from children

Only for adults. Small elements can be swallowed, causing intestinal necrosis. Keep away from children and animals.

Avoid contact if allergic

Certain individuals experience a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Extended handling may cause a rash. It is best to wear safety gloves.

Physical harm

Watch your fingers. Two large magnets will join immediately with a force of massive weight, crushing everything in their path. Be careful!

Do not underestimate power

Handle magnets consciously. Their immense force can shock even experienced users. Stay alert and respect their power.

Impact on smartphones

GPS units and mobile phones are highly susceptible to magnetism. Direct contact with a strong magnet can ruin the internal compass in your phone.

Implant safety

People with a ICD should keep an large gap from magnets. The magnetic field can disrupt the functioning of the life-saving device.

Data carriers

Avoid bringing magnets close to a purse, laptop, or screen. The magnetic field can permanently damage these devices and erase data from cards.

Magnets are brittle

Neodymium magnets are ceramic materials, meaning they are prone to chipping. Clashing of two magnets leads to them cracking into shards.

Mechanical processing

Fire warning: Rare earth powder is explosive. Do not process magnets in home conditions as this may cause fire.

Warning! Want to know more? Read our article: Are neodymium magnets dangerous?