BM 320x180x70 [4x M8] - magnetic beam
magnetic beam
Catalog no 090217
GTIN: 5906301812524
length [±0,1 mm]
320 mm
Width [±0,1 mm]
180 mm
Height [±0,1 mm]
70 mm
Weight
20550 g
3635.14 ZŁ with VAT / pcs + price for transport
2955.40 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 as well as disadvantages of NdFeB magnets.
Besides their immense strength, neodymium magnets offer the following advantages:
- Their strength is durable, and after around ten years it drops only by ~1% (theoretically),
- Neodymium magnets are distinguished by extremely resistant to demagnetization caused by magnetic disturbances,
- By using a decorative layer of silver, the element acquires an aesthetic look,
- Neodymium magnets deliver maximum magnetic induction on a their surface, which increases force concentration,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Thanks to the possibility of accurate molding and adaptation to individualized projects, NdFeB magnets can be produced in a variety of geometric configurations, which expands the range of possible applications,
- Versatile presence in innovative solutions – they serve a role in data components, drive modules, diagnostic systems, as well as other advanced devices.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Disadvantages of neodymium magnets:
- At strong impacts they can break, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Limited ability of producing nuts in the magnet and complex forms - preferred is a housing - magnet mounting.
- Potential hazard resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the context of child safety. Additionally, tiny parts of these magnets are able to be problematic in diagnostics medical in case of swallowing.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Detachment force of the magnet in optimal conditions – what it depends on?
Magnet power was defined for ideal contact conditions, including:
- using a plate made of mild steel, acting as a ideal flux conductor
- whose transverse dimension reaches at least 10 mm
- with a surface free of scratches
- with direct contact (without paint)
- under axial force vector (90-degree angle)
- in neutral thermal conditions
Determinants of practical lifting force of a magnet
In real-world applications, the real power is determined by many variables, ranked from the most important:
- Distance – the presence of foreign body (paint, tape, air) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
- Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of generating force.
- Material type – ideal substrate is pure iron steel. Stainless steels may have worse magnetic properties.
- Surface finish – full contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
- Temperature – heating the magnet results in weakening of force. Check the thermal limit for a given model.
* Holding force was measured on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a minimal clearance {between} the magnet and the plate reduces the holding force.
H&S for magnets
Keep away from computers
Intense magnetic fields can erase data on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.
Dust explosion hazard
Combustion risk: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.
Choking Hazard
Adult use only. Tiny parts can be swallowed, leading to intestinal necrosis. Store out of reach of children and animals.
Pinching danger
Mind your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, destroying everything in their path. Be careful!
Protective goggles
Despite the nickel coating, the material is brittle and not impact-resistant. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
ICD Warning
Life threat: Strong magnets can deactivate heart devices and defibrillators. Do not approach if you have electronic implants.
Safe operation
Handle magnets with awareness. Their immense force can shock even professionals. Be vigilant and do not underestimate their force.
Nickel allergy
Studies show that nickel (the usual finish) is a potent allergen. For allergy sufferers, avoid touching magnets with bare hands and select encased magnets.
GPS and phone interference
An intense magnetic field interferes with the functioning of magnetometers in phones and GPS navigation. Keep magnets near a smartphone to avoid damaging the sensors.
Demagnetization risk
Standard neodymium magnets (N-type) lose power when the temperature goes above 80°C. The loss of strength is permanent.
Important!
Looking for details? Check our post: Are neodymium magnets dangerous?
