MW 5x15 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010084
GTIN: 5906301810834
Diameter Ø
5 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
2.21 g
Magnetization Direction
↑ axial
Load capacity
4.15 kg / 40.7 N
Magnetic Induction
610.03 mT
Coating
[NiCuNi] nickel
1.107 ZŁ with VAT / pcs + price for transport
0.900 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?Want to negotiate?
Give us a call
+48 888 99 98 98
otherwise drop us a message through
inquiry form
our website.
Lifting power as well as appearance of neodymium magnets can be checked on our
our magnetic calculator.
Orders submitted before 14:00 will be dispatched today!
Magnetic properties of material N38
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Strengths as well as weaknesses of neodymium magnets.
Besides their remarkable magnetic power, neodymium magnets offer the following advantages:
- They have unchanged lifting capacity, and over around ten years their attraction force decreases symbolically – ~1% (in testing),
- They have excellent resistance to magnetism drop when exposed to external magnetic sources,
- By applying a reflective coating of nickel, the element acquires an proper look,
- Magnets have exceptionally strong magnetic induction on the working surface,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Thanks to the possibility of free shaping and customization to specialized needs, magnetic components can be manufactured in a wide range of geometric configurations, which expands the range of possible applications,
- Significant place in electronics industry – they are utilized in data components, brushless drives, medical devices, also industrial machines.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Problematic aspects of neodymium magnets: application proposals
- At strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- Due to limitations in creating nuts and complicated shapes in magnets, we recommend using cover - magnetic mechanism.
- Possible danger related to microscopic parts of magnets are risky, if swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that small components of these products are able to be problematic in diagnostics medical in case of swallowing.
- With mass production the cost of neodymium magnets is economically unviable,
Best holding force of the magnet in ideal parameters – what contributes to it?
Holding force of 4.15 kg is a measurement result conducted under standard conditions:
- on a base made of mild steel, effectively closing the magnetic field
- with a cross-section no less than 10 mm
- with an polished touching surface
- with zero gap (without paint)
- for force acting at a right angle (pull-off, not shear)
- at conditions approx. 20°C
Magnet lifting force in use – key factors
Holding efficiency impacted by specific conditions, including (from priority):
- Air gap (betwixt the magnet and the metal), since even a tiny clearance (e.g. 0.5 mm) leads to a decrease in force by up to 50% (this also applies to paint, corrosion or dirt).
- Angle of force application – maximum parameter is reached only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
- Plate thickness – too thin sheet does not close the flux, causing part of the power to be wasted into the air.
- Metal type – not every steel attracts identically. Alloy additives weaken the attraction effect.
- Surface condition – smooth surfaces guarantee perfect abutment, which increases force. Uneven metal weaken the grip.
- Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).
* Lifting capacity was measured with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the holding force is lower. Additionally, even a minimal clearance {between} the magnet and the plate reduces the lifting capacity.
Safe handling of neodymium magnets
Power loss in heat
Monitor thermal conditions. Exposing the magnet to high heat will ruin its magnetic structure and strength.
Magnets are brittle
NdFeB magnets are sintered ceramics, which means they are very brittle. Impact of two magnets leads to them breaking into shards.
Mechanical processing
Dust generated during machining of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.
Bone fractures
Pinching hazard: The pulling power is so immense that it can result in blood blisters, crushing, and even bone fractures. Use thick gloves.
Sensitization to coating
Medical facts indicate that nickel (standard magnet coating) is a strong allergen. If you have an allergy, prevent direct skin contact or opt for coated magnets.
Pacemakers
Health Alert: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.
Handling guide
Handle magnets with awareness. Their huge power can surprise even professionals. Be vigilant and do not underestimate their force.
Keep away from children
Strictly store magnets out of reach of children. Ingestion danger is significant, and the consequences of magnets clamping inside the body are fatal.
Threat to electronics
Do not bring magnets near a wallet, laptop, or TV. The magnetic field can permanently damage these devices and erase data from cards.
Phone sensors
Remember: rare earth magnets produce a field that confuses precision electronics. Keep a separation from your phone, device, and navigation systems.
Danger!
More info about risks in the article: Magnet Safety Guide.
