LM TLN - 20 R / N38 - magnetic leviton
magnetic leviton
Catalog no 290492
GTIN/EAN: 5906301814504
Weight
1000 g
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Technical parameters - LM TLN - 20 R / N38 - magnetic leviton
Specification / characteristics - LM TLN - 20 R / N38 - magnetic leviton
| properties | values |
|---|---|
| Cat. no. | 290492 |
| GTIN/EAN | 5906301814504 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Weight | 1000 g |
| Manufacturing Tolerance | ±1 mm |
Magnetic properties of material N38
| properties | values | units |
|---|---|---|
| remenance Br [min. - max.] ? | 12.2-12.6 | kGs |
| remenance Br [min. - max.] ? | 1220-1260 | mT |
| coercivity bHc ? | 10.8-11.5 | kOe |
| coercivity bHc ? | 860-915 | kA/m |
| actual internal force iHc | ≥ 12 | kOe |
| actual internal force iHc | ≥ 955 | kA/m |
| energy density [min. - max.] ? | 36-38 | BH max MGOe |
| energy density [min. - max.] ? | 287-303 | BH max KJ/m |
| max. temperature ? | ≤ 80 | °C |
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 |
Chemical composition
| 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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Advantages as well as disadvantages of rare earth magnets.
Benefits
- They virtually do not lose power, because even after 10 years the performance loss is only ~1% (according to literature),
- They are resistant to demagnetization induced by external magnetic fields,
- The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to look better,
- Magnetic induction on the surface of the magnet turns out to be maximum,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
- Thanks to freedom in constructing and the capacity to adapt to complex applications,
- Wide application in advanced technology sectors – they serve a role in mass storage devices, electromotive mechanisms, precision medical tools, and other advanced devices.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only protects them against impacts but also raises their durability
- NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited ability of making threads in the magnet and complex forms - preferred is cover - magnetic holder.
- Health risk resulting from small fragments of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these magnets are able to complicate diagnosis medical in case of swallowing.
- With mass production the cost of neodymium magnets is economically unviable,
Lifting parameters
Maximum holding power of the magnet – what contributes to it?
- with the application of a sheet made of special test steel, guaranteeing full magnetic saturation
- with a cross-section minimum 10 mm
- characterized by even structure
- with total lack of distance (without coatings)
- for force applied at a right angle (pull-off, not shear)
- at temperature room level
Impact of factors on magnetic holding capacity in practice
- Distance (between the magnet and the metal), as even a very small clearance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
- Load vector – maximum parameter is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
- Base massiveness – too thin plate does not close the flux, causing part of the power to be lost into the air.
- Metal type – not every steel attracts identically. High carbon content weaken the attraction effect.
- Surface quality – the smoother and more polished the surface, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
- Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and in frost 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 parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the load capacity.
Safety rules for work with NdFeB magnets
Life threat
Warning for patients: Strong magnetic fields affect electronics. Maintain minimum 30 cm distance or ask another person to handle the magnets.
This is not a toy
Always keep magnets out of reach of children. Choking hazard is significant, and the effects of magnets clamping inside the body are fatal.
Heat warning
Control the heat. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.
Beware of splinters
Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.
Impact on smartphones
A strong magnetic field interferes with the functioning of magnetometers in smartphones and GPS navigation. Maintain magnets near a smartphone to prevent damaging the sensors.
Powerful field
Before starting, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.
Dust explosion hazard
Fire warning: Rare earth powder is explosive. Do not process magnets without safety gear as this may cause fire.
Safe distance
Avoid bringing magnets close to a purse, computer, or TV. The magnetic field can permanently damage these devices and wipe information from cards.
Allergy Warning
A percentage of the population suffer from a sensitization to Ni, which is the standard coating for NdFeB magnets. Extended handling may cause skin redness. We recommend use protective gloves.
Finger safety
Big blocks can break fingers instantly. Never put your hand betwixt two strong magnets.
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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