UMT 12x20 blue / N38 - board holder
board holder
Catalog no 230279
GTIN/EAN: 5906301814313
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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Product card - UMT 12x20 blue / N38 - board holder
Specification / characteristics - UMT 12x20 blue / N38 - board holder
| properties | values |
|---|---|
| Cat. no. | 230279 |
| GTIN/EAN | 5906301814313 |
| 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% |
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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Pros as well as cons of rare earth magnets.
Advantages
- They virtually do not lose strength, because even after ten years the decline in efficiency is only ~1% (based on calculations),
- Magnets perfectly protect themselves against loss of magnetization caused by external fields,
- In other words, due to the metallic layer of nickel, the element looks attractive,
- They are known for high magnetic induction at the operating surface, which increases their power,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
- Considering the potential of accurate molding and adaptation to unique requirements, NdFeB magnets can be produced in a wide range of shapes and sizes, which increases their versatility,
- Wide application in advanced technology sectors – they find application in mass storage devices, electromotive mechanisms, diagnostic systems, as well as other advanced devices.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Cons
- To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
- Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- They rust 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 forms - recommended is casing - magnet mounting.
- Health risk resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the context of child safety. It is also worth noting that small components of these magnets can disrupt the diagnostic process medical after entering the body.
- With large orders the cost of neodymium magnets can be a barrier,
Pull force analysis
Maximum holding power of the magnet – what it depends on?
- with the application of a sheet made of special test steel, ensuring full magnetic saturation
- whose transverse dimension reaches at least 10 mm
- with a plane free of scratches
- under conditions of gap-free contact (surface-to-surface)
- under axial force direction (90-degree angle)
- at room temperature
Lifting capacity in real conditions – factors
- Clearance – existence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Load vector – maximum parameter is available only during perpendicular pulling. The resistance to sliding of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
- Steel thickness – insufficiently thick plate causes magnetic saturation, causing part of the flux to be wasted into the air.
- Material composition – different alloys attracts identically. High carbon content worsen the attraction effect.
- Surface structure – the smoother and more polished the surface, the larger the contact zone and higher the lifting capacity. Roughness acts like micro-gaps.
- Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity was assessed using a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under shearing force the holding force is lower. In addition, even a slight gap between the magnet and the plate reduces the lifting capacity.
Safe handling of neodymium magnets
Medical interference
Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.
Nickel allergy
Warning for allergy sufferers: The nickel-copper-nickel coating contains nickel. If an allergic reaction happens, cease working with magnets and use protective gear.
Pinching danger
Protect your hands. Two large magnets will snap together immediately with a force of massive weight, crushing anything in their path. Exercise extreme caution!
Compass and GPS
GPS units and smartphones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can decalibrate the internal compass in your phone.
Shattering risk
Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.
Dust explosion hazard
Dust created during machining of magnets is flammable. Do not drill into magnets without proper cooling and knowledge.
Do not overheat magnets
Do not overheat. Neodymium magnets are susceptible to heat. If you require resistance above 80°C, look for special high-temperature series (H, SH, UH).
Keep away from children
Only for adults. Tiny parts pose a choking risk, causing serious injuries. Keep away from children and animals.
Safe distance
Data protection: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, medical aids, timepieces).
Immense force
Use magnets consciously. Their huge power can surprise even experienced users. Stay alert and respect their power.
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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