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AM Haczyk M4 - magnetic accessories

magnetic accessories

Catalog no 080505

Coating

[NiCuNi] Nickel

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1.230 ZŁ with VAT / pcs + price for transport

1.000 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
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Strength and appearance of a neodymium magnet can be checked on our magnetic calculator.

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Technical details - AM Haczyk M4 - magnetic accessories

Specification / characteristics - AM Haczyk M4 - magnetic accessories

properties
properties values
Cat. no. 080505
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

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%
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: 080505-2026
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Force (pull)
Field Strength
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This category contains replaceable tips, adapters, and fasteners for magnets. We offer, among others: various types of hooks, eyelet holders, steel plates (washers), 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.
Elements are standardized according to metric standard, facilitating selection. It is important to select a hook or screw with the same thread diameter as the socket in the magnet. Most elements are protected against rust by galvanic zinc.
The cap increases friction (coefficient of friction), preventing the magnet from sliding down a vertical wall. We recommend them for mounting on car bodies to not scratch the paint when removing. An additional layer of rubber weakens attraction slightly but drastically increases shear force (sliding resistance).
We fulfill orders for any quantities, from one piece to thousands of items. For B2B clients, we have special trade conditions and deferred payment terms. We guarantee continuity of supply and high quality of fasteners.

Strengths and weaknesses of Nd2Fe14B magnets.

Strengths

Besides their stability, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (in laboratory conditions),
  • They have excellent resistance to magnetism drop as a result of external magnetic sources,
  • In other words, due to the reflective layer of silver, the element is aesthetically pleasing,
  • Magnets possess impressive magnetic induction on the surface,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to freedom in forming and the ability to modify to unusual requirements,
  • Wide application in innovative solutions – they serve a role in data components, drive modules, precision medical tools, as well as industrial machines.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Disadvantages of NdFeB magnets:
  • At strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We suggest a housing - magnetic mount, due to difficulties in creating threads inside the magnet and complicated shapes.
  • Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child safety. Additionally, small components of these magnets are able to be problematic in diagnostics medical in case of swallowing.
  • Due to expensive raw materials, their price exceeds standard values,

Lifting parameters

Highest magnetic holding force – what affects it?

Magnet power is the result of a measurement for ideal contact conditions, assuming:
  • using a base made of low-carbon steel, functioning as a circuit closing element
  • with a cross-section minimum 10 mm
  • characterized by smoothness
  • under conditions of no distance (metal-to-metal)
  • under vertical application of breakaway force (90-degree angle)
  • at ambient temperature room level

Lifting capacity in practice – influencing factors

It is worth knowing that the magnet holding will differ subject to the following factors, in order of importance:
  • Space between magnet and steel – every millimeter of distance (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, 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.
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of generating force.
  • Steel type – mild steel attracts best. Higher carbon content decrease magnetic permeability and holding force.
  • Surface finish – ideal contact is possible only on polished steel. Rough texture reduce the real contact area, weakening the magnet.
  • Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, in contrast under parallel forces the holding force is lower. In addition, even a slight gap between the magnet’s surface and the plate decreases the load capacity.

Safety rules for work with NdFeB magnets
Medical implants

Individuals with a heart stimulator should keep an safe separation from magnets. The magnetism can disrupt the functioning of the implant.

Metal Allergy

Certain individuals experience a sensitization to nickel, which is the standard coating for neodymium magnets. Prolonged contact might lead to skin redness. We strongly advise wear safety gloves.

Choking Hazard

Always store magnets away from children. Choking hazard is high, and the consequences of magnets clamping inside the body are life-threatening.

Bone fractures

Danger of trauma: The attraction force is so great that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.

Immense force

Use magnets with awareness. Their immense force can surprise even professionals. Stay alert and do not underestimate their power.

Magnetic interference

Navigation devices and mobile phones are highly sensitive to magnetism. Close proximity with a powerful NdFeB magnet can ruin the sensors in your phone.

Permanent damage

Avoid heat. Neodymium magnets are susceptible to heat. If you require operation above 80°C, ask us about HT versions (H, SH, UH).

Magnets are brittle

Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Keep away from computers

Do not bring magnets close to a wallet, computer, or TV. The magnetic field can destroy these devices and erase data from cards.

Fire warning

Drilling and cutting of neodymium magnets poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Caution! More info about risks in the article: Safety of working with magnets.