UMS 42x12.5x6.5x9 / N38 - conical magnetic holder
conical magnetic holder
Catalog no 220331
GTIN: 5906301814214
Diameter Ø [±0,1 mm]
42 mm
cone dimension Ø [±0,1 mm]
12.5x6.5 mm
Height [±0,1 mm]
9 mm
Weight
72 g
Magnetization Direction
↑ axial
Load capacity
37 kg / 362.85 N
Coating
[NiCuNi] nickel
27.06 ZŁ with VAT / pcs + price for transport
22.00 ZŁ net + 23% VAT / pcs
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UMS 42x12.5x6.5x9 / N38 - conical 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 immense strength, neodymium magnets offer the following advantages:
- They have constant strength, and over more than ten years their attraction force decreases symbolically – ~1% (according to theory),
- They protect against demagnetization induced by external magnetic fields remarkably well,
- Because of the reflective layer of gold, the component looks visually appealing,
- Magnetic induction on the surface of these magnets is very strong,
- These magnets tolerate extreme temperatures, often exceeding 230°C, when properly designed (in relation to build),
- With the option for customized forming and precise design, these magnets can be produced in multiple shapes and sizes, greatly improving engineering flexibility,
- Important function in new technology industries – they are utilized in computer drives, electromechanical systems, clinical machines and technologically developed systems,
- Thanks to their efficiency per volume, small magnets offer high magnetic performance, in miniature format,
Disadvantages of magnetic elements:
- They can break when subjected to a sudden impact. If the magnets are exposed to mechanical hits, it is advisable to use in a protective case. The steel housing, in the form of a holder, protects the magnet from damage while also strengthens its overall resistance,
- Magnets lose magnetic efficiency when exposed to temperatures exceeding 80°C. In most cases, this leads to irreversible field weakening (influenced by the magnet’s structure). To address this, we provide [AH] models with superior thermal resistance, able to operate even at 230°C or more,
- Due to corrosion risk in humid conditions, it is advisable to use sealed magnets made of rubber for outdoor use,
- The use of a protective casing or external holder is recommended, since machining multi-axis shapes in neodymium magnets is difficult,
- Possible threat from tiny pieces may arise, when consumed by mistake, which is important in the context of child safety. Furthermore, miniature parts from these assemblies have the potential to complicate medical imaging after being swallowed,
- In cases of tight budgets, neodymium magnet cost may not be economically viable,
Maximum lifting force for a neodymium magnet – what affects it?
The given holding capacity of the magnet means the highest holding force, calculated in ideal conditions, namely:
- with mild steel, used as a magnetic flux conductor
- of a thickness of at least 10 mm
- with a refined outer layer
- in conditions of no clearance
- under perpendicular detachment force
- in normal thermal conditions
Determinants of lifting force in real conditions
In practice, the holding capacity of a magnet is conditioned by the following aspects, in descending order of importance:
- Air gap between the magnet and the plate, since 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.
* Lifting capacity was assessed by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a slight gap {between} the magnet’s surface and the plate reduces the load capacity.
Be Cautious with Neodymium Magnets
Dust and powder from neodymium magnets are flammable.
Do not attempt to drill into neodymium magnets. Mechanical processing is also not recommended. If the magnet is crushed into fine powder or dust, it becomes highly flammable.
Keep neodymium magnets far from children.
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.
Neodymium magnets can demagnetize at high temperatures.
Whilst Neodymium magnets can lose their magnetic properties at high temperatures, it's important to note that the extent of this effect can vary based on factors such as the magnet's material, shape, and intended application.
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.
Keep neodymium magnets away from people with pacemakers.
Neodymium magnets produce strong magnetic fields that can interfere with the operation of a heart pacemaker. However, if the magnetic field does not affect the device, it can damage its components or deactivate the device when it is in a magnetic field.
Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times stronger, and their strength can shock you.
Familiarize yourself with our information to correctly handle these magnets and avoid significant injuries to your body and prevent damage to the magnets.
The magnet is coated with nickel. Therefore, exercise caution if you have an 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, try wearing gloves or avoid direct contact with nickel-plated neodymium magnets.
Neodymium magnets are characterized by their fragility, which can cause them to become damaged.
Neodymium magnetic are extremely fragile, and by joining them in an uncontrolled manner, they will crack. Neodymium magnetic 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.
Make sure not to bring neodymium magnets close to the TV, wallet, and computer HDD.
The strong magnetic field generated by neodymium magnets can damage magnetic media such as floppy disks, video tapes, HDDs, credit cards, magnetic ID cards, cassette tapes, etc. devices. They can also destroy devices like video players, televisions, CRT computer monitors. Do not forget to keep neodymium magnets away from these electronic devices.
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.
In the situation of placing a finger in the path of a neodymium magnet, in that situation, a cut or a fracture may occur.
Pay attention!
So you are aware of why neodymium magnets are so dangerous, read the article titled How dangerous are strong neodymium magnets?.