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
Strengths as well as weaknesses of rare earth magnets.
Besides their exceptional pulling force, neodymium magnets offer the following advantages:
- Their magnetic field remains stable, and after around ten years it drops only by ~1% (according to research),
- They do not lose their magnetic properties even under close interference source,
- Thanks to the smooth finish, the coating of nickel, gold-plated, or silver gives an visually attractive appearance,
- The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures approaching 230°C and above...
- Possibility of precise forming and adjusting to individual applications,
- Fundamental importance in modern technologies – they are utilized in magnetic memories, electromotive mechanisms, medical devices, as well as technologically advanced constructions.
- Thanks to concentrated force, small magnets offer high operating force, with minimal size,
Disadvantages of neodymium magnets:
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also improves its resistance to damage
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
- We recommend cover - magnetic holder, due to difficulties in creating threads inside the magnet and complex forms.
- Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. Furthermore, small elements of these products can be problematic in diagnostics medical after entering the body.
- Due to complex production process, their price is relatively high,
Maximum lifting capacity of the magnet – what contributes to it?
The declared magnet strength represents the limit force, measured under optimal environment, specifically:
- on a plate made of mild steel, effectively closing the magnetic field
- with a thickness no less than 10 mm
- characterized by smoothness
- under conditions of gap-free contact (metal-to-metal)
- under axial force vector (90-degree angle)
- in temp. approx. 20°C
Determinants of lifting force in real conditions
Bear in mind that the working load may be lower depending on elements below, starting with the most relevant:
- Distance – existence of any layer (paint, tape, gap) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
- Plate thickness – too thin sheet does not close the flux, causing part of the flux to be lost into the air.
- Plate material – mild steel attracts best. Alloy admixtures lower magnetic properties and holding force.
- Plate texture – ground elements ensure maximum contact, which increases field saturation. Uneven metal reduce efficiency.
- Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.
* Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the holding force is lower. In addition, even a slight gap {between} the magnet and the plate reduces the lifting capacity.
H&S for magnets
Permanent damage
Standard neodymium magnets (N-type) lose power when the temperature exceeds 80°C. This process is irreversible.
Handling rules
Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.
Medical interference
For implant holders: Strong magnetic fields affect electronics. Keep at least 30 cm distance or ask another person to work with the magnets.
Dust explosion hazard
Fire hazard: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.
Metal Allergy
It is widely known that nickel (the usual finish) is a strong allergen. If you have an allergy, refrain from touching magnets with bare hands and choose coated magnets.
Threat to navigation
Navigation devices and smartphones are extremely susceptible to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.
Crushing force
Mind your fingers. Two large magnets will join instantly with a force of massive weight, crushing anything in their path. Exercise extreme caution!
Data carriers
Device Safety: Strong magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).
Material brittleness
Neodymium magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets leads to them shattering into shards.
Product not for children
NdFeB magnets are not intended for children. Accidental ingestion of several magnets may result in them attracting across intestines, which poses a direct threat to life and necessitates urgent medical intervention.
Security!
Looking for details? Read our article: Are neodymium magnets dangerous?
