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
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Detailed specification - 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 |
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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Advantages as well as disadvantages of rare earth magnets.
Benefits
- They retain magnetic properties for almost 10 years – the drop is just ~1% (according to analyses),
- They have excellent resistance to weakening of magnetic properties when exposed to external fields,
- Thanks to the shimmering finish, the plating of nickel, gold, or silver gives an modern appearance,
- Neodymium magnets ensure maximum magnetic induction on a small area, which increases force concentration,
- Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
- Thanks to the option of free molding and adaptation to custom requirements, NdFeB magnets can be modeled in a broad palette of geometric configurations, which amplifies use scope,
- Key role in electronics industry – they serve a role in hard drives, drive modules, advanced medical instruments, as well as technologically advanced constructions.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Weaknesses
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
- NdFeB magnets demagnetize 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 extremely resistant to heat
- 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
- We recommend a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex forms.
- Possible danger resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. Furthermore, small components of these magnets can be problematic in diagnostics medical in case of swallowing.
- With large orders the cost of neodymium magnets can be a barrier,
Pull force analysis
Maximum lifting force for a neodymium magnet – what affects it?
- with the application of a sheet made of low-carbon steel, ensuring full magnetic saturation
- possessing a massiveness of min. 10 mm to ensure full flux closure
- characterized by lack of roughness
- without the slightest insulating layer between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- in temp. approx. 20°C
Magnet lifting force in use – key factors
- Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
- Loading method – declared lifting capacity refers to pulling vertically. When attempting to slide, the magnet exhibits significantly lower power (typically approx. 20-30% of maximum force).
- Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the lifting capacity (the magnet "punches through" it).
- Plate material – low-carbon steel gives the best results. Alloy steels lower magnetic permeability and holding force.
- Smoothness – ideal contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
- Temperature influence – high temperature weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate decreases the lifting capacity.
Safety rules for work with neodymium magnets
Keep away from children
Strictly keep magnets away from children. Ingestion danger is significant, and the effects of magnets clamping inside the body are life-threatening.
Heat sensitivity
Do not overheat. Neodymium magnets are susceptible to heat. If you require resistance above 80°C, ask us about special high-temperature series (H, SH, UH).
Warning for heart patients
People with a heart stimulator must keep an absolute distance from magnets. The magnetism can stop the functioning of the life-saving device.
Magnet fragility
Despite metallic appearance, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.
Sensitization to coating
Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, cease handling magnets and use protective gear.
Fire risk
Powder generated during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.
Do not underestimate power
Exercise caution. Rare earth magnets act from a long distance and snap with massive power, often quicker than you can move away.
Cards and drives
Do not bring magnets near a wallet, laptop, or screen. The magnetic field can permanently damage these devices and erase data from cards.
Pinching danger
Large magnets can crush fingers in a fraction of a second. Under no circumstances put your hand between two strong magnets.
Precision electronics
Note: neodymium magnets produce a field that interferes with sensitive sensors. Maintain a separation from your mobile, device, and navigation systems.
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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