MP 25x13x8 / N38 - ring magnet
ring magnet
Catalog no 030191
GTIN: 5906301812081
Diameter [±0,1 mm]
25 mm
internal diameter Ø [±0,1 mm]
13 mm
Height [±0,1 mm]
8 mm
Weight
22.62 g
Magnetization Direction
↑ axial
Load capacity
5.93 kg / 58.15 N
Magnetic Induction
146.66 mT
Coating
[NiCuNi] nickel
13.53 ZŁ with VAT / pcs + price for transport
11.00 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?Not sure about your choice?
Call us
+48 888 99 98 98
if you prefer send us a note using
contact form
the contact page.
Force as well as structure of a neodymium magnet can be analyzed using our
magnetic calculator.
Orders submitted before 14:00 will be dispatched today!
MP 25x13x8 / N38 - ring magnet
Magnetic properties of material N38
Physical properties of NdFeB
Shopping tips
Advantages and disadvantages of neodymium magnets NdFeB.
Apart from their notable holding force, neodymium magnets have these key benefits:
- They retain their full power for around ten years – the drop is just ~1% (based on simulations),
- They show strong resistance to demagnetization from external magnetic fields,
- By applying a shiny layer of gold, the element gains a sleek look,
- They exhibit elevated levels of magnetic induction near the outer area of the magnet,
- Neodymium magnets are known for exceptionally strong magnetic induction and the ability to work at temperatures up to 230°C or higher (depending on the geometry),
- With the option for fine forming and targeted design, these magnets can be produced in various shapes and sizes, greatly improving design adaptation,
- Important function in modern technologies – they serve a purpose in data storage devices, electric drives, clinical machines or even high-tech tools,
- Relatively small size with high magnetic force – neodymium magnets offer impressive pulling strength in small dimensions, which makes them useful in compact constructions
Disadvantages of neodymium magnets:
- They can break when subjected to a powerful impact. If the magnets are exposed to external force, it is suggested to place them in a protective enclosure. The steel housing, in the form of a holder, protects the magnet from damage and strengthens its overall strength,
- They lose power at extreme temperatures. Most neodymium magnets experience permanent degradation in strength when heated above 80°C (depending on the form and height). However, we offer special variants with high temperature resistance that can operate up to 230°C or higher,
- They rust in a moist environment. For outdoor use, we recommend using encapsulated magnets, such as those made of non-metallic materials,
- The use of a protective casing or external holder is recommended, since machining multi-axis shapes in neodymium magnets is not feasible,
- Potential hazard related to magnet particles may arise, if ingested accidentally, which is important in the family environments. Moreover, miniature parts from these devices might hinder health screening after being swallowed,
- High unit cost – neodymium magnets are costlier than other types of magnets (e.g., ferrite), which can restrict large-scale applications
Exercise Caution with Neodymium Magnets
Neodymium magnets are the strongest magnets ever created, and their strength can surprise you.
Familiarize yourself with our information to correctly handle these magnets and avoid significant injuries to your body and prevent disruption to the magnets.
Neodymium magnetic are particularly fragile, which leads to their breakage.
Neodymium magnetic are highly delicate, and by joining them in an uncontrolled manner, they will break. Neodymium magnets are made of metal and coated with a shiny nickel surface, but they are not as hard 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.
You should keep neodymium magnets at a safe distance from the wallet, computer, and TV.
Strong fields generated by neodymium magnets can damage magnetic storage media such as floppy disks, credit cards, magnetic ID cards, cassette tapes, video tapes, or other similar devices. They can also damage televisions, VCRs, computer monitors, and CRT displays. Avoid placing neodymium magnets in close proximity to electronic devices.
Neodymium magnets can become demagnetized at high temperatures.
Even though magnets have been found to maintain their efficacy up to temperatures of 80°C or 175°F, it's essential to consider that this threshold may fluctuate depending on the magnet's type, configuration, and intended usage.
Neodymium magnets are not recommended for people with pacemakers.
Neodymium magnets generate very strong magnetic fields that can 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.
Avoid bringing neodymium magnets close to a phone or GPS.
Neodymium magnets produce strong magnetic fields that interfere with magnetometers and compasses used in navigation, as well as internal compasses of smartphones and GPS devices.
Do not give neodymium magnets to youngest children.
Neodymium magnets are not toys. You cannot allow them to become toys for children. In such a situation, surgery is necessary to remove them. In the worst case scenario, it can result in death.
Dust and powder from neodymium magnets are highly flammable.
Avoid drilling or mechanical processing of neodymium magnets. If the magnet is crushed into fine powder or dust, it becomes highly flammable.
The magnet is coated with nickel. Therefore, exercise caution if you have an allergy.
Studies show a small percentage of people have allergies to certain metals, including 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.
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 bounce and also clash mutually within a distance of several to almost 10 cm from each other.
Be careful!
Please read the article - What danger lies in neodymium magnets? You will learn how to handle them properly.