MP 5x2.7/1.2x5 C / N38 - ring magnet
ring magnet
Catalog no 030201
GTIN: 5906301812180
Diameter [±0,1 mm]
5 mm
internal diameter Ø [±0,1 mm]
2.7/1.2 mm
Height [±0,1 mm]
5 mm
Weight
3.59 g
Magnetization Direction
↑ axial
Load capacity
0.56 kg / 5.49 N
Magnetic Induction
56.04 mT
Coating
[NiCuNi] nickel
0.836 ZŁ with VAT / pcs + price for transport
0.680 ZŁ net + 23% VAT / pcs
bulk discounts:
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Magnetic properties of material N38
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Advantages as well as disadvantages of neodymium magnets.
Besides their durability, neodymium magnets are valued for these benefits:
- They have constant strength, and over around ten years their attraction force decreases symbolically – ~1% (in testing),
- They possess excellent resistance to magnetism drop as a result of external magnetic sources,
- The use of an refined finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- Magnets are distinguished by extremely high magnetic induction on the surface,
- Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to the ability of flexible forming and customization to custom requirements, neodymium magnets can be produced in a variety of shapes and sizes, which amplifies use scope,
- Key role in electronics industry – they serve a role in computer drives, electric motors, medical equipment, and other advanced devices.
- Thanks to their power density, small magnets offer high operating force, with minimal size,
What to avoid - cons of neodymium magnets and proposals for their use:
- To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (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 very resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- We recommend casing - magnetic holder, due to difficulties in realizing threads inside the magnet and complicated shapes.
- Health risk related to microscopic parts of magnets can be dangerous, if swallowed, which gains importance in the context of child safety. Additionally, small elements of these products are able to complicate diagnosis medical after entering the body.
- With budget limitations the cost of neodymium magnets is economically unviable,
Maximum lifting capacity of the magnet – what affects it?
The declared magnet strength refers to the maximum value, recorded under optimal environment, namely:
- with the use of a yoke made of special test steel, ensuring maximum field concentration
- possessing a thickness of minimum 10 mm to ensure full flux closure
- with an polished contact surface
- without the slightest clearance between the magnet and steel
- for force applied at a right angle (in the magnet axis)
- at conditions approx. 20°C
Key elements affecting lifting force
Please note that the application force will differ depending on the following factors, in order of importance:
- Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) diminishes the pulling force, often by half at just 0.5 mm.
- Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds much less (often approx. 20-30% of maximum force).
- Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of generating force.
- Metal type – different alloys reacts the same. High carbon content worsen the interaction with the magnet.
- Surface structure – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Unevenness creates an air distance.
- Temperature – heating the magnet causes a temporary drop of force. It is worth remembering the thermal limit for a given model.
* Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under shearing force the holding force is lower. In addition, even a small distance {between} the magnet’s surface and the plate decreases the lifting capacity.
Precautions when working with neodymium magnets
Immense force
Handle magnets with awareness. Their immense force can surprise even experienced users. Be vigilant and do not underestimate their power.
Do not give to children
Neodymium magnets are not intended for children. Eating a few magnets may result in them attracting across intestines, which poses a severe health hazard and requires urgent medical intervention.
Fire warning
Drilling and cutting of NdFeB material poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.
Beware of splinters
Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Medical interference
Medical warning: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.
Finger safety
Danger of trauma: The pulling power is so immense that it can cause hematomas, crushing, and even bone fractures. Use thick gloves.
Permanent damage
Watch the temperature. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.
Avoid contact if allergic
Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If skin irritation appears, cease handling magnets and use protective gear.
Threat to navigation
Be aware: neodymium magnets produce a field that disrupts sensitive sensors. Keep a safe distance from your phone, device, and GPS.
Magnetic media
Data protection: Neodymium magnets can damage payment cards and sensitive devices (pacemakers, hearing aids, mechanical watches).
Safety First!
Details about risks in the article: Safety of working with magnets.
