UMT 12x20 black set / N38 - board holder
board holder
Catalog no 230264
GTIN/EAN: 5906301814276
Diameter Ø
12 mm [±1 mm]
Height
20 mm [±1 mm]
Weight
33.5 g
Coating
[NiCuNi] Nickel
44.99 ZŁ with VAT / pcs + price for transport
36.58 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical of the product - UMT 12x20 black set / N38 - board holder
Specification / characteristics - UMT 12x20 black set / N38 - board holder
| properties | values |
|---|---|
| Cat. no. | 230264 |
| GTIN/EAN | 5906301814276 |
| 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 | 33.5 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% |
Sustainability
| 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.
Pros
- They retain full power for around 10 years – the loss is just ~1% (according to analyses),
- They feature excellent resistance to magnetism drop as a result of external fields,
- By using a decorative layer of nickel, the element acquires an aesthetic look,
- They feature high magnetic induction at the operating surface, which increases their power,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to modularity in designing and the capacity to customize to complex applications,
- Key role in high-tech industry – they are used in mass storage devices, drive modules, precision medical tools, and industrial machines.
- Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,
Cons
- They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- We recommend casing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complicated forms.
- Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these devices can be problematic in diagnostics medical when they are in the body.
- Due to expensive raw materials, their price is higher than average,
Lifting parameters
Breakaway strength of the magnet in ideal conditions – what affects it?
- with the contact of a sheet made of special test steel, ensuring maximum field concentration
- with a cross-section minimum 10 mm
- with a surface cleaned and smooth
- under conditions of no distance (metal-to-metal)
- under vertical force vector (90-degree angle)
- in stable room temperature
Practical lifting capacity: influencing factors
- Distance – existence of any layer (paint, tape, gap) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
- Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet exhibits much less (typically approx. 20-30% of nominal force).
- Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
- Chemical composition of the base – mild steel gives the best results. Alloy admixtures lower magnetic properties and lifting capacity.
- Smoothness – ideal contact is obtained only on smooth steel. Rough texture reduce the real contact area, weakening the magnet.
- Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under shearing force the load capacity is reduced by as much as 5 times. Moreover, even a slight gap between the magnet and the plate lowers the lifting capacity.
Warnings
Protective goggles
Neodymium magnets are ceramic materials, meaning they are fragile like glass. Collision of two magnets leads to them cracking into shards.
Sensitization to coating
Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, cease handling magnets and use protective gear.
Precision electronics
A powerful magnetic field disrupts the operation of compasses in smartphones and navigation systems. Keep magnets close to a device to prevent damaging the sensors.
Handling guide
Before use, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.
Electronic hazard
Very strong magnetic fields can destroy records on credit cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.
Demagnetization risk
Regular neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. The loss of strength is permanent.
Fire warning
Mechanical processing of NdFeB material carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is hard to extinguish.
Do not give to children
Absolutely keep magnets away from children. Ingestion danger is high, and the consequences of magnets clamping inside the body are fatal.
Danger to pacemakers
Patients with a ICD must maintain an safe separation from magnets. The magnetic field can disrupt the operation of the implant.
Pinching danger
Big blocks can crush fingers in a fraction of a second. Never put your hand between two strong magnets.
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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