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BM 380x180x70 [4x M8] - magnetic beam
magnetic beam
Catalog no 090218
GTIN/EAN: 5906301812531
length
380 mm [±1 mm]
Width
180 mm [±1 mm]
Height
70 mm [±1 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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Detailed specification - BM 380x180x70 [4x M8] - magnetic beam
Specification / characteristics - BM 380x180x70 [4x M8] - magnetic beam
| properties | values |
|---|---|
| Cat. no. | 090218 |
| GTIN/EAN | 5906301812531 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 380 mm [±1 mm] |
| Width | 180 mm [±1 mm] |
| Height | 70 mm [±1 mm] |
| Weight | 24400 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 |
Material specification
| 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 |
View also proposals
![SM 25x250 [2xM8] / N52 - magnetic separator](https://cdn3.dhit.pl/graphics/products/sm-25x250-2xm8-sam.jpg "SM 25x250 [2xM8] / N52 - magnetic separator")
Pros and cons of Nd2Fe14B magnets.
Pros
- They virtually do not lose power, 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,
- Thanks to the shimmering finish, the surface of Ni-Cu-Ni, gold-plated, or silver gives an modern appearance,
- The surface of neodymium magnets generates a intense magnetic field – this is a distinguishing feature,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Possibility of detailed creating as well as modifying to concrete applications,
- Wide application in electronics industry – they are commonly used in computer drives, motor assemblies, medical devices, also complex engineering applications.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Disadvantages
- 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
- Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures 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 resistant to moisture, when using outdoors
- Limited possibility of creating threads in the magnet and complex shapes - recommended is cover - magnetic holder.
- Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child health protection. Furthermore, tiny parts of these products can be problematic in diagnostics medical in case of swallowing.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities
Pull force analysis
Best holding force of the magnet in ideal parameters – what contributes to it?
- with the use of a yoke made of low-carbon steel, ensuring full magnetic saturation
- whose transverse dimension reaches at least 10 mm
- with an polished touching surface
- without the slightest clearance between the magnet and steel
- during pulling in a direction vertical to the plane
- in temp. approx. 20°C
Lifting capacity in practice – influencing factors
- Gap (between the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) leads to a drastic drop in force by up to 50% (this also applies to varnish, rust or dirt).
- Force direction – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Steel thickness – insufficiently thick sheet does not close the flux, causing part of the power to be escaped into the air.
- Metal type – not every steel attracts identically. Alloy additives weaken the attraction effect.
- Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Uneven metal weaken the grip.
- Heat – neodymium magnets have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a small distance between the magnet and the plate lowers the holding force.
Precautions when working with NdFeB magnets
Medical interference
Warning for patients: Powerful magnets disrupt electronics. Maintain at least 30 cm distance or request help to work with the magnets.
Magnetic media
Device Safety: Strong magnets can ruin payment cards and sensitive devices (heart implants, hearing aids, timepieces).
Warning for allergy sufferers
A percentage of the population experience a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Prolonged contact may cause a rash. It is best to wear protective gloves.
Do not overheat magnets
Watch the temperature. Heating the magnet above 80 degrees Celsius will permanently weaken its magnetic structure and pulling force.
Do not drill into magnets
Fire warning: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.
Hand protection
Protect your hands. Two large magnets will join immediately with a force of several hundred kilograms, crushing anything in their path. Be careful!
Keep away from electronics
A powerful magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Maintain magnets near a smartphone to avoid breaking the sensors.
Swallowing risk
Only for adults. Small elements can be swallowed, leading to serious injuries. Store away from children and animals.
Do not underestimate power
Handle with care. Rare earth magnets act from a long distance and connect with massive power, often faster than you can move away.
Beware of splinters
NdFeB magnets are ceramic materials, which means they are very brittle. Clashing of two magnets leads to them shattering into shards.
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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