UMT 12x20 black / N38 - board holder
board holder
Catalog no 230285
GTIN/EAN: 5906301814375
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 specification of the product - UMT 12x20 black / N38 - board holder
Specification / characteristics - UMT 12x20 black / N38 - board holder
| properties | values |
|---|---|
| Cat. no. | 230285 |
| GTIN/EAN | 5906301814375 |
| 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 |
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% |
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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Advantages as well as disadvantages of rare earth magnets.
Benefits
- They do not lose power, even during nearly 10 years – the reduction in strength is only ~1% (theoretically),
- Magnets very well resist against loss of magnetization caused by foreign field sources,
- Thanks to the elegant finish, the surface of Ni-Cu-Ni, gold-plated, or silver gives an aesthetic appearance,
- The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- In view of the potential of free molding and adaptation to individualized requirements, neodymium magnets can be manufactured in a wide range of forms and dimensions, which makes them more universal,
- Key role in modern technologies – they serve a role in data components, electric motors, medical equipment, as well as technologically advanced constructions.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Cons
- They are fragile upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
- When exposed to high temperature, neodymium magnets experience a drop in force. 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 resistant to moisture, when using outdoors
- Due to limitations in creating nuts and complicated shapes in magnets, we propose using a housing - magnetic mechanism.
- Possible danger resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. It is also worth noting that tiny parts of these magnets are able to disrupt the diagnostic process medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities
Lifting parameters
Highest magnetic holding force – what contributes to it?
- on a base made of structural steel, optimally conducting the magnetic field
- with a thickness minimum 10 mm
- with a surface perfectly flat
- without the slightest insulating layer between the magnet and steel
- for force applied at a right angle (pull-off, not shear)
- in neutral thermal conditions
Lifting capacity in practice – influencing factors
- Gap (between the magnet and the metal), because even a microscopic clearance (e.g. 0.5 mm) can cause a drastic drop in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
- Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits much less (often approx. 20-30% of nominal force).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Material composition – not every steel reacts the same. Alloy additives weaken the attraction effect.
- Plate texture – ground elements ensure maximum contact, which improves force. Rough surfaces weaken the grip.
- Temperature – heating the magnet results in weakening of force. Check the thermal limit for a given model.
Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a small distance between the magnet and the plate reduces the holding force.
H&S for magnets
Allergy Warning
It is widely known that nickel (standard magnet coating) is a potent allergen. If you have an allergy, refrain from touching magnets with bare hands and choose coated magnets.
Magnet fragility
Despite metallic appearance, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.
Medical interference
Warning for patients: Strong magnetic fields affect electronics. Maintain minimum 30 cm distance or ask another person to handle the magnets.
Fire warning
Dust created during cutting of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.
Maximum temperature
Standard neodymium magnets (grade N) lose power when the temperature goes above 80°C. This process is irreversible.
Electronic hazard
Intense magnetic fields can destroy records on payment cards, HDDs, and other magnetic media. Stay away of at least 10 cm.
Immense force
Before use, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.
Threat to navigation
Be aware: neodymium magnets produce a field that interferes with sensitive sensors. Keep a separation from your phone, device, and GPS.
Physical harm
Big blocks can smash fingers in a fraction of a second. Under no circumstances put your hand between two strong magnets.
Keep away from children
Adult use only. Tiny parts pose a choking risk, leading to intestinal necrosis. Store away from children and animals.
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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