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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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Give us a call +48 888 99 98 98 or contact us via our online form our website.
Weight as well as shape of a neodymium magnet can be tested with our magnetic mass calculator.

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Product card - 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
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: 080505-2026
Magnet Unit Converter
Magnet pull force
Magnetic Induction
Input data into any field, and the rest change on the fly.

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In this category, we offer a wide selection of complementary elements for magnetic holders. We offer, among others: open and closed hooks, eye bolts (shackles), steel plates (washers), and rubber covers. Thanks to these additions, you can adapt any magnetic holder to your individual needs.
Thanks to steel plates, you can create a magnetic point on wood, plastic, glass, or wall. Just stick the plate in the chosen place using strong 3M tape (often included). It's an ideal solution for closing cabinets, hanging tools, or mounting smoke detectors.
Tips fit sockets with thread M3, M4, M5, M6, M8, M10, M12, etc. 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. 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.
We fulfill orders for any quantities, from one piece to thousands of items. For larger orders, we offer attractive discounts and individual quotes. Most goods are available off-the-shelf in our warehouse, guaranteeing fast delivery.

Advantages as well as disadvantages of neodymium magnets.

Advantages

Besides their remarkable strength, neodymium magnets offer the following advantages:
  • They retain attractive force for almost 10 years – the loss is just ~1% (in theory),
  • Neodymium magnets are characterized by exceptionally resistant to loss of magnetic properties caused by external field sources,
  • Thanks to the glossy finish, the coating of nickel, gold, or silver-plated gives an aesthetic appearance,
  • Magnets exhibit extremely high magnetic induction on the outer layer,
  • 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 modularity in shaping and the ability to modify to unusual requirements,
  • Huge importance in advanced technology sectors – they are used in hard drives, electric motors, medical equipment, as well as industrial machines.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Weaknesses

Disadvantages of NdFeB magnets:
  • At very strong impacts they can crack, therefore we recommend placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • We recommend casing - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complex shapes.
  • Health risk to health – tiny shards of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Furthermore, small components of these products are able to disrupt the diagnostic process medical in case of swallowing.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

Maximum lifting force for a neodymium magnet – what contributes to it?

Breakaway force was defined for optimal configuration, including:
  • with the contact of a yoke made of special test steel, guaranteeing maximum field concentration
  • possessing a massiveness of minimum 10 mm to avoid saturation
  • with an ideally smooth touching surface
  • without any insulating layer between the magnet and steel
  • under perpendicular force direction (90-degree angle)
  • at temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

In real-world applications, the actual lifting capacity results from many variables, ranked from most significant:
  • Gap (betwixt the magnet and the plate), since even a very small clearance (e.g. 0.5 mm) can cause a decrease in force by up to 50% (this also applies to varnish, rust or debris).
  • Angle of force application – highest force is obtained only during perpendicular pulling. The force required to slide of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin plate does not accept the full field, causing part of the power to be wasted to the other side.
  • Material type – the best choice is high-permeability steel. Hardened steels may attract less.
  • Surface structure – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
  • Temperature – temperature increase results in weakening of induction. It is worth remembering the thermal limit for a given model.

Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate reduces the load capacity.

Warnings
Life threat

Health Alert: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.

Safe distance

Do not bring magnets near a wallet, laptop, or TV. The magnetism can permanently damage these devices and wipe information from cards.

Handling guide

Handle with care. Rare earth magnets act from a long distance and connect with massive power, often quicker than you can react.

Metal Allergy

A percentage of the population have a contact allergy to Ni, which is the standard coating for neodymium magnets. Extended handling may cause an allergic reaction. We suggest wear safety gloves.

Demagnetization risk

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

Eye protection

NdFeB magnets are ceramic materials, which means they are very brittle. Impact of two magnets will cause them shattering into small pieces.

Bone fractures

Large magnets can crush fingers in a fraction of a second. Do not put your hand betwixt two strong magnets.

Danger to the youngest

Only for adults. Small elements can be swallowed, leading to severe trauma. Store out of reach of kids and pets.

Precision electronics

Remember: neodymium magnets generate a field that interferes with precision electronics. Maintain a separation from your mobile, device, and navigation systems.

Fire warning

Mechanical processing of neodymium magnets carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Danger! More info about hazards in the article: Safety of working with magnets.