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BM 450x180x70 [4x M8] - magnetic beam
magnetic beam
Catalog no 090219
GTIN/EAN: 5906301812548
length
450 mm [±1 mm]
Width
180 mm [±1 mm]
Height
70 mm [±1 mm]
Weight
28900 g
4734.89 ZŁ with VAT / pcs + price for transport
3849.50 ZŁ net + 23% VAT / pcs
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Physical properties - BM 450x180x70 [4x M8] - magnetic beam
Specification / characteristics - BM 450x180x70 [4x M8] - magnetic beam
| properties | values |
|---|---|
| Cat. no. | 090219 |
| GTIN/EAN | 5906301812548 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 450 mm [±1 mm] |
| Width | 180 mm [±1 mm] |
| Height | 70 mm [±1 mm] |
| Weight | 28900 g |
| Manufacturing Tolerance | ±1 mm |
Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C
| properties | values | units |
|---|---|---|
| Vickers hardness | ≥550 | Hv |
| Density | ≥7.4 | g/cm3 |
| Curie Temperature TC | 312 - 380 | °C |
| Curie Temperature TF | 593 - 716 | °F |
| Specific resistance | 150 | μΩ⋅cm |
| Bending strength | 250 | MPa |
| Compressive strength | 1000~1100 | MPa |
| Thermal expansion parallel (∥) to orientation (M) | (3-4) x 10-6 | °C-1 |
| Thermal expansion perpendicular (⊥) to orientation (M) | -(1-3) x 10-6 | °C-1 |
| Young's modulus | 1.7 x 104 | kg/mm² |
Elemental analysis
| iron (Fe) | 64% – 68% |
| neodymium (Nd) | 29% – 32% |
| boron (B) | 1.1% – 1.2% |
| dysprosium (Dy) | 0.5% – 2.0% |
| coating (Ni-Cu-Ni) | < 0.05% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Pros as well as cons of rare earth magnets.
Strengths
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (based on calculations),
- They are resistant to demagnetization induced by presence of other magnetic fields,
- By using a reflective coating of gold, the element acquires an aesthetic look,
- They feature high magnetic induction at the operating surface, making them more effective,
- 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...
- Possibility of custom modeling as well as modifying to defined applications,
- Key role in innovative solutions – they serve a role in HDD drives, electromotive mechanisms, advanced medical instruments, also modern systems.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Limitations
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only shields the magnet but also improves its resistance to damage
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise 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
- We recommend casing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex forms.
- Potential hazard related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the aspect of protecting the youngest. It is also worth noting that tiny parts of these products can disrupt the diagnostic process medical in case of swallowing.
- With large orders the cost of neodymium magnets is a challenge,
Pull force analysis
Breakaway strength of the magnet in ideal conditions – what affects it?
- using a base made of high-permeability steel, serving as a magnetic yoke
- possessing a massiveness of min. 10 mm to ensure full flux closure
- with an polished contact surface
- without the slightest clearance between the magnet and steel
- during pulling in a direction vertical to the mounting surface
- at temperature room level
Lifting capacity in practice – influencing factors
- Distance (between the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) results in a decrease in force by up to 50% (this also applies to varnish, rust or dirt).
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Steel type – mild steel attracts best. Alloy steels lower magnetic properties and holding force.
- Surface condition – ground elements guarantee perfect abutment, which increases field saturation. Uneven metal reduce efficiency.
- Thermal conditions – NdFeB sinters have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity was measured with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, in contrast under parallel forces the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate reduces the holding force.
Safe handling of NdFeB magnets
Machining danger
Machining of NdFeB material poses a fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Handling guide
Be careful. Rare earth magnets attract from a long distance and connect with huge force, often quicker than you can react.
ICD Warning
Medical warning: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.
Permanent damage
Control the heat. Exposing the magnet above 80 degrees Celsius will destroy its properties and strength.
Physical harm
Large magnets can break fingers instantly. Never put your hand betwixt two attracting surfaces.
Precision electronics
Remember: rare earth magnets produce a field that confuses sensitive sensors. Keep a safe distance from your mobile, tablet, and navigation systems.
Product not for children
Adult use only. Tiny parts pose a choking risk, leading to intestinal necrosis. Store away from kids and pets.
Safe distance
Do not bring magnets near a wallet, laptop, or TV. The magnetism can permanently damage these devices and wipe information from cards.
Magnet fragility
Despite metallic appearance, the material is brittle and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
Nickel allergy
It is widely known that nickel (standard magnet coating) is a potent allergen. If you have an allergy, refrain from touching magnets with bare hands and choose versions in plastic housing.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
GLS kurier
Przesyłka będzie u Ciebie za 2-3 dni
14.99 ZŁ
InPost Paczkomaty 24/7
Przesyłka będzie u Ciebie za 1-2 dni
12.30 ZŁ
Płatność przy odbiorze (pobranie):
GLS kurier
Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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