MW 29x10 / N38 - cylindrical magnet
cylindrical magnet
Catalog no 010053
GTIN: 5906301810520
Diameter Ø [±0,1 mm]
29 mm
Height [±0,1 mm]
10 mm
Weight
49.54 g
Magnetization Direction
↑ axial
Load capacity
16.04 kg / 157.3 N
Magnetic Induction
351.88 mT
Coating
[NiCuNi] nickel
17.34 ZŁ with VAT / pcs + price for transport
14.10 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
Advantages and disadvantages of NdFeB magnets.
Besides their durability, neodymium magnets are valued for these benefits:
- They retain attractive force for almost ten years – the drop is just ~1% (in theory),
- Magnets very well resist against loss of magnetization caused by foreign field sources,
- A magnet with a shiny gold surface has better aesthetics,
- Neodymium magnets achieve maximum magnetic induction on a their surface, which ensures high operational effectiveness,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Considering the option of free shaping and adaptation to custom projects, NdFeB magnets can be manufactured in a wide range of geometric configurations, which expands the range of possible applications,
- Key role in advanced technology sectors – they find application in magnetic memories, brushless drives, diagnostic systems, as well as modern systems.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Disadvantages of neodymium magnets:
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Limited ability of making threads in the magnet and complicated forms - recommended is a housing - mounting mechanism.
- Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. Furthermore, tiny parts of these magnets are able to complicate diagnosis medical in case of swallowing.
- Due to complex production process, their price is higher than average,
Maximum lifting force for a neodymium magnet – what affects it?
Holding force of 16.04 kg is a result of laboratory testing conducted under specific, ideal conditions:
- with the use of a sheet made of special test steel, ensuring full magnetic saturation
- whose transverse dimension reaches at least 10 mm
- with a plane perfectly flat
- without any insulating layer between the magnet and steel
- for force applied at a right angle (in the magnet axis)
- at ambient temperature approx. 20 degrees Celsius
Impact of factors on magnetic holding capacity in practice
Holding efficiency is influenced by specific conditions, mainly (from most important):
- Distance – existence of foreign body (rust, dirt, gap) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
- Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
- Base massiveness – insufficiently thick steel does not accept the full field, causing part of the flux to be lost to the other side.
- Material type – the best choice is high-permeability steel. Hardened steels may generate lower lifting capacity.
- Surface finish – ideal contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
- Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.
* Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the load capacity is reduced by as much as 5 times. Moreover, even a slight gap {between} the magnet and the plate reduces the holding force.
Safety rules for work with neodymium magnets
Warning for allergy sufferers
It is widely known that nickel (the usual finish) is a common allergen. If you have an allergy, avoid touching magnets with bare hands and opt for coated magnets.
Compass and GPS
Remember: neodymium magnets generate a field that disrupts sensitive sensors. Maintain a safe distance from your mobile, tablet, and GPS.
Crushing force
Large magnets can crush fingers instantly. Do not place your hand betwixt two strong magnets.
Keep away from computers
Equipment safety: Strong magnets can damage payment cards and sensitive devices (heart implants, medical aids, timepieces).
Fire warning
Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this may cause fire.
Operating temperature
Watch the temperature. Heating the magnet to high heat will ruin its magnetic structure and pulling force.
Shattering risk
Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.
Health Danger
Medical warning: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.
Safe operation
Exercise caution. Rare earth magnets act from a distance and snap with massive power, often quicker than you can react.
Product not for children
Only for adults. Tiny parts pose a choking risk, leading to severe trauma. Keep out of reach of children and animals.
Attention!
Details about hazards in the article: Safety of working with magnets.
