BM 550x180x70 [4x M8] - magnetic beam
magnetic beam
Catalog no 090221
GTIN: 5906301812562
length [±0,1 mm]
550 mm
Width [±0,1 mm]
180 mm
Height [±0,1 mm]
70 mm
Weight
35320 g
5708.18 ZŁ with VAT / pcs + price for transport
4640.80 ZŁ net + 23% VAT / pcs
bulk discounts:
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Magnetic properties of material
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
Shopping tips
Strengths and weaknesses of rare earth magnets.
Besides their tremendous strength, neodymium magnets offer the following advantages:
- They do not lose power, even over approximately 10 years – the reduction in lifting capacity is only ~1% (based on measurements),
- They are extremely resistant to demagnetization induced by external disturbances,
- A magnet with a metallic nickel surface has better aesthetics,
- Magnetic induction on the working part of the magnet is exceptional,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- Thanks to freedom in forming and the ability to adapt to specific needs,
- Significant place in innovative solutions – they serve a role in computer drives, electromotive mechanisms, medical devices, also complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in compact constructions
Disadvantages of NdFeB magnets:
- They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects the magnet but also increases its resistance to damage
- Neodymium magnets decrease their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
- Due to limitations in realizing threads and complicated forms in magnets, we propose using a housing - magnetic mount.
- Health risk related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these products can complicate diagnosis medical after entering the body.
- Due to neodymium price, their price is relatively high,
Maximum holding power of the magnet – what it depends on?
The load parameter shown concerns the limit force, measured under optimal environment, specifically:
- using a base made of mild steel, acting as a circuit closing element
- possessing a massiveness of min. 10 mm to avoid saturation
- characterized by even structure
- without any clearance between the magnet and steel
- for force applied at a right angle (pull-off, not shear)
- at ambient temperature room level
Practical lifting capacity: influencing factors
Holding efficiency impacted by working environment parameters, such as (from most important):
- Gap (betwixt the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
- Load vector – highest force is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
- Base massiveness – too thin plate does not close the flux, causing part of the flux to be escaped to the other side.
- Plate material – mild steel gives the best results. Alloy steels reduce magnetic properties and holding force.
- Surface quality – the more even the plate, the larger the contact zone and stronger the hold. Roughness creates an air distance.
- Thermal factor – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
* Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under parallel forces the load capacity is reduced by as much as 5 times. Moreover, even a minimal clearance {between} the magnet’s surface and the plate lowers the load capacity.
Precautions when working with neodymium magnets
Heat sensitivity
Control the heat. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.
Do not give to children
Adult use only. Tiny parts pose a choking risk, leading to serious injuries. Keep away from kids and pets.
Compass and GPS
Remember: neodymium magnets generate a field that interferes with precision electronics. Maintain a safe distance from your phone, device, and navigation systems.
Magnet fragility
NdFeB magnets are ceramic materials, which means they are prone to chipping. Impact of two magnets leads to them breaking into shards.
Magnetic media
Data protection: Neodymium magnets can damage data carriers and sensitive devices (heart implants, medical aids, mechanical watches).
Safe operation
Before use, read the rules. Sudden snapping can destroy the magnet or injure your hand. Be predictive.
Skin irritation risks
Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If skin irritation occurs, immediately stop handling magnets and wear gloves.
Combustion hazard
Machining of NdFeB material poses a fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Pinching danger
Mind your fingers. Two powerful magnets will snap together immediately with a force of several hundred kilograms, destroying everything in their path. Be careful!
Medical interference
Medical warning: Strong magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.
Safety First!
Looking for details? Check our post: Are neodymium magnets dangerous?
