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Neodymium magnets – most powerful on the market

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AM ucho małe [M8] - magnetic accessories

magnetic accessories

Catalog no 080345

GTIN/EAN: 5906301812487

5.00

Weight

27 g

Load capacity

240.00 kg / 2353.60 N

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4.92 ZŁ with VAT / pcs + price for transport

4.00 ZŁ net + 23% VAT / pcs

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Strength along with appearance of a neodymium magnet can be tested with our force calculator.

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Detailed specification - AM ucho małe [M8] - magnetic accessories

Specification / characteristics - AM ucho małe [M8] - magnetic accessories

properties
properties values
Cat. no. 080345
GTIN/EAN 5906301812487
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Weight 27 g
Load capacity ~ ? 240.00 kg / 2353.60 N
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
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: 080345-2026
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Force (pull)
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You will find essential equipment here for building professional mounting systems. We offer, among others: open and closed hooks, eye bolts (shackles), mounting plates for magnets, and rubber covers. Thanks to these additions, you can adapt any magnetic holder to your individual needs.
Steel plates (washers) allow the use of magnets on non-magnetic surfaces. 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.
Our accessories are compatible with holders having standard metric threads (ISO). Before purchase, check the thread size in your magnetic holder (it is given in the description). 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. 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. Most goods are available off-the-shelf in our warehouse, guaranteeing fast delivery.

Pros and cons of Nd2Fe14B magnets.

Pros

Besides their remarkable magnetic power, neodymium magnets offer the following advantages:
  • They have constant strength, and over nearly 10 years their performance decreases symbolically – ~1% (in testing),
  • They have excellent resistance to weakening of magnetic properties when exposed to external magnetic sources,
  • A magnet with a shiny nickel surface looks better,
  • The surface of neodymium magnets generates a maximum magnetic field – this is a key feature,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • Thanks to the option of flexible shaping and adaptation to specialized projects, neodymium magnets can be produced in a wide range of geometric configurations, which increases their versatility,
  • Versatile presence in modern industrial fields – they are utilized in hard drives, drive modules, precision medical tools, also modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which allows their use in compact constructions

Weaknesses

Disadvantages of NdFeB magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
  • NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • Limited ability of creating nuts in the magnet and complicated shapes - preferred is casing - magnetic holder.
  • Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child safety. It is also worth noting that small elements of these products can complicate diagnosis medical when they are in the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Pull force analysis

Magnetic strength at its maximum – what affects it?

The lifting capacity listed is a theoretical maximum value executed under the following configuration:
  • using a sheet made of low-carbon steel, serving as a circuit closing element
  • with a cross-section of at least 10 mm
  • with a plane perfectly flat
  • under conditions of no distance (surface-to-surface)
  • during detachment in a direction vertical to the mounting surface
  • at standard ambient temperature

Impact of factors on magnetic holding capacity in practice

It is worth knowing that the application force will differ subject to elements below, starting with the most relevant:
  • Clearance – existence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to pulling vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Metal type – different alloys reacts the same. Alloy additives weaken the interaction with the magnet.
  • Surface finish – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.

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

Safety rules for work with neodymium magnets
Skin irritation risks

Certain individuals suffer from a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Extended handling might lead to a rash. We strongly advise wear protective gloves.

Do not give to children

These products are not toys. Swallowing multiple magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and requires immediate surgery.

Bodily injuries

Risk of injury: The pulling power is so great that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.

Thermal limits

Monitor thermal conditions. Exposing the magnet to high heat will permanently weaken its magnetic structure and strength.

Handling guide

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

Material brittleness

Watch out for shards. Magnets can explode upon violent connection, ejecting sharp fragments into the air. Wear goggles.

Fire risk

Mechanical processing of NdFeB material poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Life threat

Patients with a pacemaker should maintain an absolute distance from magnets. The magnetic field can stop the operation of the life-saving device.

Compass and GPS

A powerful magnetic field disrupts the functioning of compasses in phones and navigation systems. Do not bring magnets near a smartphone to prevent damaging the sensors.

Electronic devices

Equipment safety: Strong magnets can damage payment cards and sensitive devices (heart implants, medical aids, timepieces).

Important! Want to know more? Check our post: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98