UMC 48x11/7x11.5 / N38 - cylindrical magnetic holder
cylindrical magnetic holder
Catalog no 320412
GTIN: 5906301814689
Diameter [±0,1 mm]
48 mm
internal diameter Ø [±0,1 mm]
11/7 mm
Height [±0,1 mm]
11.5 mm
Weight
114 g
Load capacity
63 kg / 617.82 N
Coating
[NiCuNi] nickel
45.10 ZŁ with VAT / pcs + price for transport
36.67 ZŁ net + 23% VAT / pcs
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UMC 48x11/7x11.5 / N38 - cylindrical magnetic holder
Magnetic properties of material N38
Physical properties of NdFeB
Shopping tips
Advantages as well as disadvantages of neodymium magnets NdFeB.
In addition to their exceptional magnetic power, neodymium magnets offer the following advantages:
- Their magnetic field remains stable, and after approximately ten years, it drops only by ~1% (according to research),
- They protect against demagnetization induced by surrounding electromagnetic environments effectively,
- Thanks to the shiny finish and nickel coating, they have an aesthetic appearance,
- The outer field strength of the magnet shows advanced magnetic properties,
- These magnets tolerate high temperatures, often exceeding 230°C, when properly designed (in relation to build),
- With the option for customized forming and personalized design, these magnets can be produced in multiple shapes and sizes, greatly improving design adaptation,
- Significant impact in advanced technical fields – they are utilized in data storage devices, electromechanical systems, healthcare devices and technologically developed systems,
- Compactness – despite their small size, they deliver powerful magnetism, making them ideal for precision applications
Disadvantages of rare earth magnets:
- They may fracture when subjected to a heavy impact. If the magnets are exposed to physical collisions, it is suggested to place them in a metal holder. The steel housing, in the form of a holder, protects the magnet from damage , and at the same time strengthens its overall resistance,
- Magnets lose power when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible performance loss (influenced by the magnet’s form). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
- They rust in a humid environment. If exposed to rain, we recommend using waterproof magnets, such as those made of plastic,
- Limited ability to create complex details in the magnet – the use of a external casing is recommended,
- Possible threat due to small fragments may arise, when consumed by mistake, which is significant in the protection of children. Additionally, miniature parts from these devices might hinder health screening if inside the body,
- High unit cost – neodymium magnets are pricier than other types of magnets (e.g., ferrite), which increases the cost of large-scale applications
Detachment force of the magnet in optimal conditions – what it depends on?
The given strength of the magnet represents the optimal strength, measured in the best circumstances, that is:
- with mild steel, serving as a magnetic flux conductor
- having a thickness of no less than 10 millimeters
- with a polished side
- with zero air gap
- with vertical force applied
- at room temperature
Practical lifting capacity: influencing factors
The lifting capacity of a magnet is determined by in practice key elements, from primary to secondary:
- Air gap between the magnet and the plate, because even a very small distance (e.g. 0.5 mm) can cause a drop in lifting force of up to 50%.
- Direction of applied force, because the maximum lifting capacity is achieved under perpendicular application. The force required to slide the magnet along the plate is usually several times lower.
- Thickness of the plate, as a plate that is too thin causes part of the magnetic flux not to be used and to remain wasted in the air.
- Material of the plate, because higher carbon content lowers holding force, while higher iron content increases it. The best choice is steel with high magnetic permeability and high saturation induction.
- Surface of the plate, because the more smooth and polished it is, the better the contact and consequently the greater the magnetic saturation.
- Operating temperature, since all permanent magnets have a negative temperature coefficient. This means that at high temperatures they are weaker, while at sub-zero temperatures they become slightly stronger.
* Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the lifting capacity is smaller. Moreover, even a slight gap {between} the magnet’s surface and the plate lowers the lifting capacity.
Safety Precautions
Avoid bringing neodymium magnets close to a phone or GPS.
Magnetic fields can interfere with compasses and magnetometers used in aviation and maritime navigation, as well as internal compasses of smartphones and GPS devices. There are neodymium magnets in every smartphone, for example, in the microphone and speakers.
Neodymium magnetic are especially fragile, resulting in their breakage.
Neodymium magnets are characterized by considerable fragility. Magnets made of neodymium are made of metal and coated with a shiny nickel, but they are not as durable as steel. In the event of a collision between two magnets, there may be a scattering of fragments in different directions. Protecting your eyes is crucial in such a situation.
Neodymium magnets can attract to each other due to their immense internal force, causing the skin and other body parts to get pinched and resulting in significant swellings.
Neodymium magnets will bounce and also contact together within a distance of several to around 10 cm from each other.
Neodymium magnets are the strongest magnets ever invented. Their power can surprise you.
Familiarize yourself with our information to correctly handle these magnets and avoid significant swellings to your body and prevent damage to the magnets.
Neodymium magnets can become demagnetized at high temperatures.
Although magnets have shown to retain their effectiveness up to 80°C or 175°F, this temperature may vary depending on the type of material, shape, and intended use of the magnet.
Keep neodymium magnets away from people with pacemakers.
Neodymium magnets generate strong magnetic fields. As a result, they interfere with the operation of a pacemaker. This is because many of these devices are equipped with a function that deactivates the device in a magnetic field.
Magnets should not be treated as toys. Therefore, it is not recommended for children to have access to them.
Remember that neodymium magnets are not toys. Be cautious and make sure no child plays with them. In the case of swallowing multiple magnets simultaneously, they can attract to each other through the intestinal walls. In the worst case scenario, this can lead to death.
Avoid contact with neodymium magnets if you have a nickel allergy.
Studies clearly indicate a small percentage of people who suffer from metal allergies such as nickel. An allergic reaction often manifests as skin redness and rash. If you have a nickel allergy, you can try wearing gloves or simply avoid direct contact with nickel-plated neodymium magnets.
Dust and powder from neodymium magnets are flammable.
Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. Once crushed into fine powder or dust, this material becomes highly flammable.
Make sure not to bring neodymium magnets close to the TV, wallet, and computer HDD.
Strong magnetic fields emitted by neodymium magnets can destroy magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other devices. In addition, they can damage televisions, VCRs, computer monitors, and CRT displays. You should especially avoid placing neodymium magnets near electronic devices.
Safety precautions!
In order to show why neodymium magnets are so dangerous, read the article - How dangerous are strong neodymium magnets?.