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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

technical specifications »

4.92 ZŁ with VAT / pcs + price for transport

4.00 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
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Pick up the phone and ask +48 22 499 98 98 alternatively get in touch by means of form the contact section.
Specifications as well as form of magnetic components can be reviewed using our magnetic mass calculator.

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Technical - 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
Engineering data and GPSR
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: 080345-2026
Measurement Calculator
Magnet pull force
Magnetic Field
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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, eyelet holders, mounting plates for magnets, and rubber anti-slip caps. These are essential elements to fully utilize the potential of neodymium magnets in practice.
Steel plates (washers) allow the use of magnets on non-magnetic surfaces. After fixing the plate, you gain a place where the magnet will hold just like on a fridge. It's an ideal solution for closing cabinets, hanging tools, or mounting smoke detectors.
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). We offer accessories made of galvanized or stainless steel, resistant to corrosion.
Rubber caps perform a protective function (against scratches) and anti-slip. 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 supply manufacturing companies, advertising agencies, and workshops with necessary mounting accessories. For larger orders, we offer attractive discounts and individual quotes. We guarantee continuity of supply and high quality of fasteners.

Strengths as well as weaknesses of neodymium magnets.

Strengths

Besides their exceptional magnetic power, neodymium magnets offer the following advantages:
  • Their power is durable, and after approximately 10 years it decreases only by ~1% (theoretically),
  • They are noted for resistance to demagnetization induced by external field influence,
  • Thanks to the glossy finish, the surface of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
  • Magnetic induction on the working layer of the magnet is exceptional,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of exact machining and modifying to concrete needs,
  • Versatile presence in modern technologies – they find application in hard drives, electric drive systems, medical devices, and complex engineering applications.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Disadvantages

Disadvantages of neodymium 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.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • We recommend a housing - magnetic mount, due to difficulties in creating threads inside the magnet and complex shapes.
  • 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. Furthermore, small elements of these devices are able to be problematic in diagnostics medical in case of swallowing.
  • With large orders the cost of neodymium magnets can be a barrier,

Pull force analysis

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

Information about lifting capacity was defined for optimal configuration, taking into account:
  • with the contact of a sheet made of special test steel, ensuring full magnetic saturation
  • possessing a massiveness of min. 10 mm to ensure full flux closure
  • with a plane perfectly flat
  • with zero gap (without paint)
  • for force applied at a right angle (pull-off, not shear)
  • at temperature room level

Practical aspects of lifting capacity – factors

It is worth knowing that the application force will differ depending on elements below, in order of importance:
  • Gap between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the nominal value.
  • Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
  • Material composition – not every steel reacts the same. High carbon content weaken the attraction effect.
  • Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
  • Thermal factor – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under a perpendicular pulling force, in contrast under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.

H&S for magnets
Magnetic media

Very strong magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.

Keep away from children

Product intended for adults. Small elements can be swallowed, causing serious injuries. Store away from kids and pets.

Material brittleness

Protect your eyes. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Wear goggles.

Nickel allergy

Certain individuals suffer from a hypersensitivity to nickel, which is the common plating for neodymium magnets. Prolonged contact might lead to dermatitis. We strongly advise use safety gloves.

Conscious usage

Before use, check safety instructions. Uncontrolled attraction can break the magnet or injure your hand. Think ahead.

Crushing force

Danger of trauma: The pulling power is so great that it can cause hematomas, crushing, and even bone fractures. Use thick gloves.

Do not overheat magnets

Do not overheat. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, look for HT versions (H, SH, UH).

Combustion hazard

Dust generated during cutting of magnets is self-igniting. Do not drill into magnets unless you are an expert.

Medical interference

Medical warning: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.

Precision electronics

Navigation devices and smartphones are highly susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Attention! Need more info? Check our post: Why are neodymium magnets dangerous?