UMT 12x20 green / N38 - board holder
board holder
Catalog no 230281
GTIN/EAN: 5906301814337
Diameter Ø
12 mm [±1 mm]
Height
20 mm [±1 mm]
Weight
3.5 g
Coating
[NiCuNi] Nickel
1.894 ZŁ with VAT / pcs + price for transport
1.540 ZŁ net + 23% VAT / pcs
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Physical properties - UMT 12x20 green / N38 - board holder
Specification / characteristics - UMT 12x20 green / N38 - board holder
| properties | values |
|---|---|
| Cat. no. | 230281 |
| GTIN/EAN | 5906301814337 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 12 mm [±1 mm] |
| Height | 20 mm [±1 mm] |
| Weight | 3.5 g |
| Coating | [NiCuNi] Nickel |
| 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 |
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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![UI 17.5x5 [C310] / N38 - badge holder](https://cdn3.dhit.pl/graphics/products/ui17.5x5-c310-rud.jpg "UI 17.5x5 [C310] / N38 - badge holder")
Pros and cons of rare earth magnets.
Strengths
- Their strength remains stable, and after approximately ten years it drops only by ~1% (according to research),
- They possess excellent resistance to magnetic field loss as a result of external magnetic sources,
- The use of an shiny coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- They show high magnetic induction at the operating surface, which increases their power,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Thanks to modularity in forming and the capacity to adapt to complex applications,
- Wide application in advanced technology sectors – they are utilized in magnetic memories, electric motors, advanced medical instruments, and complex engineering applications.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Weaknesses
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
- We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- Limited possibility of producing threads in the magnet and complicated shapes - recommended is a housing - magnetic holder.
- Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. Additionally, small elements of these magnets can be problematic in diagnostics medical after entering the body.
- Due to neodymium price, their price is relatively high,
Pull force analysis
Maximum lifting capacity of the magnet – what affects it?
- on a plate made of structural steel, optimally conducting the magnetic flux
- possessing a thickness of minimum 10 mm to ensure full flux closure
- characterized by even structure
- without any air gap between the magnet and steel
- under perpendicular force direction (90-degree angle)
- in neutral thermal conditions
Practical lifting capacity: influencing factors
- Distance (betwixt the magnet and the plate), since even a tiny clearance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Angle of force application – maximum parameter is reached only during pulling at a 90° angle. The shear force of the magnet along the surface is typically several times smaller (approx. 1/5 of the lifting capacity).
- Base massiveness – insufficiently thick plate does not close the flux, causing part of the power to be wasted to the other side.
- Material type – the best choice is pure iron steel. Cast iron may have worse magnetic properties.
- Surface structure – the smoother and more polished the surface, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
- Temperature – temperature increase causes a temporary drop of induction. Check the maximum operating temperature for a given model.
Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate reduces the holding force.
Precautions when working with neodymium magnets
Precision electronics
A powerful magnetic field interferes with the operation of magnetometers in smartphones and GPS navigation. Maintain magnets near a device to prevent breaking the sensors.
Cards and drives
Equipment safety: Strong magnets can damage payment cards and sensitive devices (pacemakers, hearing aids, mechanical watches).
Medical interference
Health Alert: Neodymium magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.
Sensitization to coating
Certain individuals experience a hypersensitivity to nickel, which is the common plating for NdFeB magnets. Extended handling may cause an allergic reaction. We strongly advise wear protective gloves.
Protective goggles
Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.
Bone fractures
Large magnets can smash fingers in a fraction of a second. Under no circumstances place your hand between two attracting surfaces.
Immense force
Be careful. Rare earth magnets act from a long distance and connect with massive power, often faster than you can react.
Permanent damage
Watch the temperature. Heating the magnet to high heat will destroy its properties and pulling force.
Danger to the youngest
NdFeB magnets are not suitable for play. Accidental ingestion of a few magnets can lead to them pinching intestinal walls, which poses a direct threat to life and necessitates immediate surgery.
Fire risk
Fire warning: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this may cause fire.
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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