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.
In addition to their long-term stability, neodymium magnets provide the following advantages:
- They have unchanged lifting capacity, and over nearly ten years their performance decreases symbolically – ~1% (in testing),
- Magnets effectively resist against demagnetization caused by foreign field sources,
- In other words, due to the smooth surface of silver, the element becomes visually attractive,
- Magnetic induction on the working part of the magnet is maximum,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
- Possibility of custom modeling and optimizing to concrete conditions,
- Wide application in high-tech industry – they are commonly used in HDD drives, electric motors, advanced medical instruments, as well as modern systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Disadvantages of NdFeB magnets:
- At strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- Neodymium magnets lose 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 recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- Due to limitations in producing threads and complicated forms in magnets, we recommend using cover - magnetic holder.
- Potential hazard to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the context of child health protection. Furthermore, tiny parts of these products can complicate diagnosis medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities
Optimal lifting capacity of a neodymium magnet – what it depends on?
Holding force of 16.04 kg is a result of laboratory testing conducted under standard conditions:
- on a plate made of structural steel, optimally conducting the magnetic field
- with a cross-section no less than 10 mm
- with an polished contact surface
- under conditions of no distance (metal-to-metal)
- under vertical force direction (90-degree angle)
- at room temperature
Practical aspects of lifting capacity – factors
During everyday use, the actual holding force is determined by a number of factors, presented from crucial:
- Distance (between the magnet and the plate), as even a microscopic distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to varnish, corrosion or dirt).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
- Material composition – not every steel reacts the same. Alloy additives worsen the interaction with the magnet.
- Plate texture – ground elements ensure maximum contact, which improves force. Rough surfaces reduce efficiency.
- Temperature – heating the magnet causes a temporary drop of induction. It is worth remembering the maximum operating temperature for a given model.
* Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, however under shearing force the lifting capacity is smaller. Moreover, even a slight gap {between} the magnet and the plate lowers the load capacity.
Safe handling of neodymium magnets
Compass and GPS
GPS units and smartphones are highly susceptible to magnetism. Direct contact with a strong magnet can permanently damage the internal compass in your phone.
Swallowing risk
Product intended for adults. Small elements pose a choking risk, causing intestinal necrosis. Store out of reach of kids and pets.
Eye protection
Beware of splinters. Magnets can fracture upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.
Thermal limits
Do not overheat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, inquire about special high-temperature series (H, SH, UH).
Flammability
Powder generated during cutting of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
Bodily injuries
Big blocks can smash fingers instantly. Under no circumstances put your hand betwixt two attracting surfaces.
Handling rules
Before use, read the rules. Sudden snapping can break the magnet or hurt your hand. Think ahead.
Skin irritation risks
Some people experience a contact allergy to nickel, which is the standard coating for neodymium magnets. Extended handling might lead to an allergic reaction. It is best to use protective gloves.
ICD Warning
Patients with a heart stimulator have to maintain an large gap from magnets. The magnetism can interfere with the functioning of the implant.
Electronic hazard
Intense magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.
Caution!
Want to know more? Read our article: Are neodymium magnets dangerous?
