UMT 12x20 red / N38 - board holder
board holder
Catalog no 230278
GTIN/EAN: 5906301814306
- 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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Detailed specification - UMT 12x20 red / N38 - board holder
Specification / characteristics - UMT 12x20 red / N38 - board holder
| properties | values |
|---|---|
| Cat. no. | 230278 |
| GTIN/EAN | 5906301814306 |
| 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Pros and cons of Nd2Fe14B magnets.
Pros
- They have constant strength, and over nearly 10 years their performance decreases symbolically – ~1% (in testing),
- Magnets perfectly protect themselves against loss of magnetization caused by external fields,
- A magnet with a metallic nickel surface looks better,
- The surface of neodymium magnets generates a powerful magnetic field – this is one of their assets,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Possibility of precise shaping and optimizing to complex conditions,
- Wide application in modern industrial fields – they find application in data components, brushless drives, medical devices, also modern systems.
- Thanks to concentrated force, small magnets offer high operating force, with minimal size,
Cons
- To avoid cracks under impact, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
- NdFeB magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
- We recommend casing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complex forms.
- Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small components of these devices can be problematic in diagnostics medical after entering the body.
- Due to complex production process, their price is relatively high,
Holding force characteristics
Maximum magnetic pulling force – what it depends on?
- with the use of a sheet made of special test steel, ensuring maximum field concentration
- possessing a thickness of minimum 10 mm to ensure full flux closure
- with an polished contact surface
- with direct contact (without impurities)
- during pulling in a direction perpendicular to the mounting surface
- at standard ambient temperature
Magnet lifting force in use – key factors
- Distance – the presence of any layer (paint, dirt, air) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
- Force direction – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of nominal force).
- Steel thickness – too thin steel does not accept the full field, causing part of the power to be wasted to the other side.
- Material composition – different alloys reacts the same. Alloy additives weaken the attraction effect.
- Base smoothness – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
- Thermal environment – heating the magnet results in weakening of force. It is worth remembering the thermal limit for a given model.
Lifting capacity was measured using a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under shearing force the load capacity is reduced by as much as fivefold. Moreover, even a slight gap between the magnet and the plate decreases the lifting capacity.
Warnings
Do not overheat magnets
Regular neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. Damage is permanent.
Conscious usage
Be careful. Neodymium magnets act from a distance and connect with huge force, often faster than you can react.
Medical interference
Individuals with a pacemaker should keep an safe separation from magnets. The magnetism can disrupt the functioning of the life-saving device.
Flammability
Fire hazard: Rare earth powder is explosive. Avoid machining magnets without safety gear as this risks ignition.
Avoid contact if allergic
Certain individuals suffer from a hypersensitivity to Ni, which is the standard coating for neodymium magnets. Prolonged contact may cause an allergic reaction. We recommend wear safety gloves.
Threat to navigation
A powerful magnetic field negatively affects the functioning of compasses in smartphones and GPS navigation. Keep magnets close to a device to avoid damaging the sensors.
Keep away from computers
Device Safety: Neodymium magnets can damage data carriers and delicate electronics (heart implants, medical aids, timepieces).
Danger to the youngest
Product intended for adults. Tiny parts pose a choking risk, leading to severe trauma. Store away from kids and pets.
Protective goggles
Despite the nickel coating, the material is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.
Hand protection
Large magnets can break fingers instantly. Under no circumstances put your hand between two attracting surfaces.
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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