BM 380x180x70 [4x M8] - magnetic beam
magnetic beam
Catalog no 090218
GTIN: 5906301812531
length [±0,1 mm]
380 mm
Width [±0,1 mm]
180 mm
Height [±0,1 mm]
70 mm
Weight
24400 g
4185.08 ZŁ with VAT / pcs + price for transport
3402.50 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
Advantages and disadvantages of rare earth magnets.
Besides their remarkable pulling force, neodymium magnets offer the following advantages:
- Their power is maintained, and after approximately ten years it drops only by ~1% (according to research),
- Magnets effectively protect themselves against loss of magnetization caused by ambient magnetic noise,
- A magnet with a shiny silver surface is more attractive,
- Magnets are characterized by extremely high magnetic induction on the active area,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
- Thanks to versatility in designing and the ability to modify to specific needs,
- Fundamental importance in high-tech industry – they serve a role in computer drives, electromotive mechanisms, advanced medical instruments, and industrial machines.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Disadvantages of neodymium magnets:
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
- Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- They oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in producing nuts and complicated shapes in magnets, we recommend using cover - magnetic mount.
- Possible danger to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. Additionally, small components of these products can be problematic in diagnostics medical after entering the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities
Highest magnetic holding force – what contributes to it?
Information about lifting capacity was defined for the most favorable conditions, including:
- with the use of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
- with a cross-section of at least 10 mm
- with a plane free of scratches
- with direct contact (no paint)
- under vertical force direction (90-degree angle)
- at standard ambient temperature
What influences lifting capacity in practice
Real force is affected by working environment parameters, mainly (from most important):
- Distance (betwixt the magnet and the plate), as even a very small clearance (e.g. 0.5 mm) can cause a drastic drop in force by up to 50% (this also applies to varnish, rust or debris).
- Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
- Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Material composition – not every steel attracts identically. High carbon content weaken the interaction with the magnet.
- Surface structure – the more even the surface, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
- Temperature influence – high temperature reduces magnetic field. Too high temperature can permanently demagnetize the magnet.
* Lifting capacity was measured by applying a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, however under shearing force the lifting capacity is smaller. In addition, even a small distance {between} the magnet’s surface and the plate decreases the holding force.
Precautions when working with NdFeB magnets
Do not underestimate power
Handle magnets with awareness. Their huge power can shock even experienced users. Stay alert and do not underestimate their power.
ICD Warning
For implant holders: Strong magnetic fields affect medical devices. Maintain at least 30 cm distance or ask another person to handle the magnets.
Metal Allergy
Nickel alert: The Ni-Cu-Ni coating contains nickel. If skin irritation occurs, immediately stop working with magnets and wear gloves.
Power loss in heat
Keep cool. NdFeB magnets are sensitive to temperature. If you need operation above 80°C, look for HT versions (H, SH, UH).
Shattering risk
Beware of splinters. Magnets can fracture upon violent connection, launching sharp fragments into the air. Eye protection is mandatory.
No play value
Absolutely store magnets out of reach of children. Risk of swallowing is significant, and the consequences of magnets connecting inside the body are fatal.
Magnetic media
Data protection: Strong magnets can ruin data carriers and sensitive devices (pacemakers, medical aids, mechanical watches).
Crushing force
Danger of trauma: The pulling power is so immense that it can result in hematomas, crushing, and even bone fractures. Use thick gloves.
Machining danger
Mechanical processing of neodymium magnets poses a fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.
Keep away from electronics
An intense magnetic field negatively affects the functioning of compasses in smartphones and navigation systems. Do not bring magnets near a device to avoid damaging the sensors.
Attention!
Want to know more? Read our article: Are neodymium magnets dangerous?
