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 neodymium magnets.
Besides their tremendous field intensity, neodymium magnets offer the following advantages:
- Their magnetic field remains stable, and after approximately 10 years it drops only by ~1% (theoretically),
- They show high resistance to demagnetization induced by presence of other magnetic fields,
- In other words, due to the glossy layer of nickel, the element gains a professional look,
- Magnetic induction on the working part of the magnet remains exceptional,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
- Considering the ability of accurate shaping and customization to specialized projects, NdFeB magnets can be modeled in a wide range of geometric configurations, which amplifies use scope,
- Fundamental importance in modern technologies – they serve a role in magnetic memories, electric drive systems, medical equipment, also complex engineering applications.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Disadvantages of NdFeB magnets:
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, when using outdoors
- We recommend casing - magnetic mount, due to difficulties in creating nuts inside the magnet and complex forms.
- Possible danger to health – tiny shards of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, tiny parts of these magnets can be problematic in diagnostics medical when they are in the body.
- Due to complex production process, their price is higher than average,
Detachment force of the magnet in optimal conditions – what affects it?
The lifting capacity listed is a result of laboratory testing executed under standard conditions:
- using a base made of high-permeability steel, functioning as a circuit closing element
- possessing a thickness of min. 10 mm to ensure full flux closure
- with an ground contact surface
- without any clearance between the magnet and steel
- during pulling in a direction vertical to the mounting surface
- at conditions approx. 20°C
Practical lifting capacity: influencing factors
Real force is affected by specific conditions, such as (from most important):
- Gap between magnet and steel – every millimeter of separation (caused e.g. by veneer or unevenness) diminishes the pulling force, often by half at just 0.5 mm.
- Loading method – declared lifting capacity refers to detachment vertically. When slipping, the magnet holds significantly lower power (typically approx. 20-30% of maximum force).
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Steel type – mild steel attracts best. Alloy admixtures reduce magnetic properties and holding force.
- Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Rough surfaces weaken the grip.
- Temperature – heating the magnet results in weakening of induction. It is worth remembering the thermal limit for a given model.
* Lifting capacity was assessed by applying a polished steel plate of optimal thickness (min. 20 mm), under vertically applied force, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap {between} the magnet and the plate decreases the lifting capacity.
Precautions when working with neodymium magnets
Fragile material
NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Impact of two magnets will cause them shattering into shards.
Allergy Warning
Studies show that nickel (the usual finish) is a potent allergen. If you have an allergy, prevent touching magnets with bare hands or opt for versions in plastic housing.
Safe distance
Do not bring magnets close to a wallet, laptop, or TV. The magnetic field can permanently damage these devices and erase data from cards.
Choking Hazard
Product intended for adults. Tiny parts can be swallowed, leading to severe trauma. Store out of reach of kids and pets.
Conscious usage
Handle magnets with awareness. Their huge power can shock even experienced users. Be vigilant and respect their power.
Thermal limits
Keep cool. NdFeB magnets are sensitive to temperature. If you need resistance above 80°C, inquire about HT versions (H, SH, UH).
Serious injuries
Large magnets can break fingers instantly. Do not place your hand betwixt two attracting surfaces.
Compass and GPS
Navigation devices and mobile phones are extremely sensitive to magnetism. Close proximity with a powerful NdFeB magnet can decalibrate the internal compass in your phone.
Do not drill into magnets
Dust generated during cutting of magnets is flammable. Do not drill into magnets unless you are an expert.
Medical implants
People with a ICD should maintain an large gap from magnets. The magnetic field can interfere with the functioning of the implant.
Attention!
Need more info? Check our post: Why are neodymium magnets dangerous?
