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
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Magnetic properties of material N38
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Pros and cons of neodymium magnets.
Besides their immense magnetic power, neodymium magnets offer the following advantages:
- They do not lose strength, even after approximately 10 years – the drop in power is only ~1% (based on measurements),
- They are extremely resistant to demagnetization induced by presence of other magnetic fields,
- Thanks to the shimmering finish, the layer of nickel, gold-plated, or silver-plated gives an aesthetic appearance,
- Magnetic induction on the working layer of the magnet remains strong,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures reaching 230°C and above...
- Thanks to freedom in forming and the ability to adapt to complex applications,
- Huge importance in high-tech industry – they serve a role in data components, electric drive systems, diagnostic systems, as well as multitasking production systems.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages of neodymium magnets:
- To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects 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 power (a factor is the shape and 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 advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
- Due to limitations in creating nuts and complicated forms in magnets, we propose using cover - magnetic mount.
- Potential hazard resulting from small fragments of magnets are risky, if swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small components of these magnets can disrupt the diagnostic process medical in case of swallowing.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Optimal lifting capacity of a neodymium magnet – what affects it?
Holding force of 0.56 kg is a result of laboratory testing executed under standard conditions:
- on a block made of structural steel, perfectly concentrating the magnetic field
- with a thickness no less than 10 mm
- with a plane perfectly flat
- without any clearance between the magnet and steel
- during pulling in a direction perpendicular to the mounting surface
- at standard ambient temperature
Lifting capacity in real conditions – factors
Holding efficiency is influenced by specific conditions, mainly (from priority):
- Clearance – existence of foreign body (paint, dirt, air) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
- Force direction – note 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.
- Plate thickness – too thin plate does not accept the full field, causing part of the flux to be wasted into the air.
- Metal type – not every steel reacts the same. High carbon content weaken the attraction effect.
- Smoothness – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
- Thermal factor – high temperature weakens pulling force. Too high temperature can permanently damage the magnet.
* Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a slight gap {between} the magnet’s surface and the plate decreases the load capacity.
Safety rules for work with neodymium magnets
Product not for children
Product intended for adults. Small elements can be swallowed, leading to serious injuries. Keep away from kids and pets.
Immense force
Use magnets with awareness. Their immense force can surprise even experienced users. Plan your moves and do not underestimate their power.
Magnetic media
Powerful magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.
Dust is flammable
Powder created during machining of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.
GPS Danger
GPS units and mobile phones are extremely susceptible to magnetism. Close proximity with a strong magnet can permanently damage the internal compass in your phone.
Life threat
Individuals with a pacemaker should keep an safe separation from magnets. The magnetism can stop the operation of the implant.
Hand protection
Pinching hazard: The attraction force is so great that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.
Magnets are brittle
Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.
Heat warning
Control the heat. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.
Nickel coating and allergies
Some people suffer from a contact allergy to nickel, which is the typical protective layer for NdFeB magnets. Frequent touching might lead to dermatitis. It is best to use protective gloves.
Attention!
Need more info? Check our post: Why are neodymium magnets dangerous?
