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
bulk discounts:
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Technical - 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 |
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Strengths and weaknesses of neodymium magnets.
Pros
- They do not lose strength, even during nearly 10 years – the reduction in strength is only ~1% (based on measurements),
- They are resistant to demagnetization induced by external disturbances,
- Thanks to the smooth finish, the plating of Ni-Cu-Ni, gold, or silver gives an clean appearance,
- Magnets are distinguished by exceptionally strong magnetic induction on the surface,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures reaching 230°C and above...
- Possibility of detailed creating and optimizing to atypical conditions,
- Huge importance in future technologies – they are commonly used in magnetic memories, brushless drives, diagnostic systems, and other advanced devices.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Disadvantages
- At very strong impacts they can break, therefore we advise placing them in special holders. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- Limited possibility of creating nuts in the magnet and complex forms - preferred is casing - magnetic holder.
- Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small components of these devices are able to complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities
Lifting parameters
Magnetic strength at its maximum – what it depends on?
- with the use of a yoke made of low-carbon steel, ensuring full magnetic saturation
- whose thickness is min. 10 mm
- with a surface free of scratches
- without any insulating layer between the magnet and steel
- during pulling in a direction perpendicular to the mounting surface
- at temperature room level
Practical lifting capacity: influencing factors
- Distance – existence of any layer (rust, tape, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the holding force drops drastically, often to levels of 20-30% of the nominal value.
- Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
- Steel grade – ideal substrate is high-permeability steel. Hardened steels may have worse magnetic properties.
- Smoothness – ideal contact is possible only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
- Operating temperature – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and in frost they can be stronger (up to a certain limit).
Lifting capacity was assessed using a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, in contrast under attempts to slide the magnet the load capacity is reduced by as much as 75%. Moreover, even a minimal clearance between the magnet and the plate reduces the lifting capacity.
Safety rules for work with NdFeB magnets
Crushing force
Big blocks can break fingers in a fraction of a second. Do not place your hand betwixt two attracting surfaces.
Material brittleness
Despite metallic appearance, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.
Electronic devices
Very strong magnetic fields can destroy records on payment cards, hard drives, and storage devices. Keep a distance of min. 10 cm.
Heat sensitivity
Watch the temperature. Exposing the magnet to high heat will ruin its magnetic structure and pulling force.
ICD Warning
For implant holders: Strong magnetic fields disrupt electronics. Keep at least 30 cm distance or ask another person to handle the magnets.
Do not underestimate power
Use magnets with awareness. Their immense force can shock even professionals. Plan your moves and respect their force.
Dust is flammable
Drilling and cutting of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.
Compass and GPS
A strong magnetic field negatively affects the operation of compasses in phones and GPS navigation. Keep magnets close to a device to prevent breaking the sensors.
Nickel coating and allergies
Certain individuals experience a contact allergy to Ni, which is the common plating for NdFeB magnets. Extended handling can result in an allergic reaction. It is best to use protective gloves.
Swallowing risk
Absolutely store magnets away from children. Choking hazard is significant, and the effects of magnets connecting inside the body are fatal.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
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Płatność przy odbiorze (pobranie):
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Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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