UMGGW 66x8.5 [M8] GW / N38 - magnetic holder rubber internal thread
magnetic holder rubber internal thread
Catalog no 160308
GTIN: 5906301813668
Diameter Ø [±0,1 mm]
66 mm
Height [±0,1 mm]
8.5 mm
Weight
100 g
Load capacity
18.4 kg / 180.44 N
23.37 ZŁ with VAT / pcs + price for transport
19.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Lifting power as well as appearance of neodymium magnets can be estimated with our
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UMGGW 66x8.5 [M8] GW / N38 - magnetic holder rubber internal thread
Magnetic properties of material N38
Physical properties of NdFeB
Shopping tips
Advantages and disadvantages of neodymium magnets NdFeB.
Apart from their superior magnetic energy, neodymium magnets have these key benefits:
- Their power remains stable, and after around ten years, it drops only by ~1% (theoretically),
- They show superior resistance to demagnetization from external magnetic fields,
- In other words, due to the metallic silver coating, the magnet obtains an aesthetic appearance,
- They exhibit extremely high levels of magnetic induction near the outer area of the magnet,
- They are suitable for high-temperature applications, operating effectively at 230°C+ due to advanced heat resistance and form-specific properties,
- The ability for accurate shaping or customization to individual needs – neodymium magnets can be manufactured in many forms and dimensions, which extends the scope of their use cases,
- Wide application in cutting-edge sectors – they are used in data storage devices, electromechanical systems, medical equipment or even sophisticated instruments,
- Relatively small size with high magnetic force – neodymium magnets offer impressive pulling strength in tiny dimensions, which makes them useful in small systems
Disadvantages of magnetic elements:
- They are fragile when subjected to a sudden impact. If the magnets are exposed to shocks, we recommend in a steel housing. The steel housing, in the form of a holder, protects the magnet from cracks and additionally increases its overall durability,
- They lose field intensity at extreme temperatures. Most neodymium magnets experience permanent reduction 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,
- Due to corrosion risk in humid conditions, it is wise to use sealed magnets made of protective material for outdoor use,
- Limited ability to create internal holes in the magnet – the use of a magnetic holder is recommended,
- Potential hazard linked to microscopic shards may arise, when consumed by mistake, which is crucial in the family environments. Furthermore, small elements from these devices may interfere with diagnostics when ingested,
- High unit cost – neodymium magnets are costlier than other types of magnets (e.g., ferrite), which increases the cost of large-scale applications
Magnetic strength at its maximum – what affects it?
The given lifting capacity of the magnet represents the maximum lifting force, calculated under optimal conditions, specifically:
- using a steel plate with low carbon content, acting as a magnetic circuit closure
- having a thickness of no less than 10 millimeters
- with a smooth surface
- with no separation
- with vertical force applied
- at room temperature
What influences lifting capacity in practice
In practice, the holding capacity of a magnet is conditioned by these factors, from crucial to less important:
- Air gap between the magnet and the plate, as 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 determined with the use of a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a minimal clearance {between} the magnet and the plate lowers the lifting capacity.
Safety Precautions
Neodymium magnets should not be near 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.
The magnet coating contains nickel, so be cautious if you have a nickel 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.
Keep neodymium magnets as far away as possible from GPS and smartphones.
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.
Magnets are not toys, youngest should not play with them.
Not all neodymium magnets are toys, so do not let children play with them. In the case of small magnets, they can be swallowed and cause choking. In such cases, the only solution is to undergo surgery to remove the magnets, and otherwise, it can even lead to death.
Neodymium Magnets can attract to each other, pinch the skin, and cause significant injuries.
Magnets will jump and clash together within a radius of several to almost 10 cm from each other.
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.
Comparing neodymium magnets to ferrite magnets (found in speakers), they are 10 times more powerful, and their strength 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.
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.
Neodymium magnets are delicate as well as can easily break and shatter.
Neodymium magnets are fragile and will crack if allowed to collide with each other, even from a distance of a few centimeters. Despite being made of metal as well as coated with a shiny nickel plating, they are not as hard as steel. At the moment of connection between the magnets, tiny sharp metal fragments can be propelled in various directions at high speed. Eye protection is recommended.
Do not place neodymium magnets near a computer HDD, TV, and wallet.
Strong magnetic fields emitted by neodymium magnets can damage 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. Avoid placing neodymium magnets in close proximity to electronic devices.
Pay attention!
In order for you to know how powerful neodymium magnets are and why they are so dangerous, see the article - Dangerous powerful neodymium magnets.
