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
bulk discounts:
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Technical details - 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 |
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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
![UMP 94x40 [3xM10] GW F550 Silver Black Lina / N52 - search holder](https://cdn3.dhit.pl/graphics/products/ump-94x40-3xm10-gw-f550-lina-gub.jpg "UMP 94x40 [3xM10] GW F550 Silver Black Lina / N52 - search holder")
Advantages and disadvantages of neodymium magnets.
Pros
- They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
- They are noted for resistance to demagnetization induced by external disturbances,
- By covering with a smooth layer of nickel, the element acquires an aesthetic look,
- Magnetic induction on the surface of the magnet is exceptional,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures reaching 230°C and above...
- Thanks to modularity in forming and the capacity to adapt to unusual requirements,
- Wide application in electronics industry – they are used in HDD drives, electric motors, diagnostic systems, and multitasking production systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Limitations
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
- Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (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 very resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
- Limited possibility of producing threads in the magnet and complex forms - recommended is cover - magnet mounting.
- Health risk to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the aspect of protecting the youngest. Additionally, small elements of these magnets can complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which hinders application in large quantities
Holding force characteristics
Highest magnetic holding force – what affects it?
- with the contact of a sheet made of low-carbon steel, guaranteeing full magnetic saturation
- whose thickness is min. 10 mm
- characterized by smoothness
- under conditions of no distance (metal-to-metal)
- during detachment in a direction perpendicular to the mounting surface
- at conditions approx. 20°C
Practical lifting capacity: influencing factors
- Space between surfaces – every millimeter of separation (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
- Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
- Material composition – different alloys attracts identically. Alloy additives weaken the attraction effect.
- Smoothness – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
- Heat – NdFeB sinters have a negative temperature coefficient. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).
Lifting capacity was measured by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, in contrast under shearing force the load capacity is reduced by as much as 75%. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.
Safe handling of NdFeB magnets
Warning for heart patients
People with a pacemaker have to keep an large gap from magnets. The magnetic field can disrupt the functioning of the life-saving device.
GPS and phone interference
Be aware: rare earth magnets produce a field that confuses precision electronics. Maintain a safe distance from your mobile, tablet, and navigation systems.
Power loss in heat
Avoid heat. Neodymium magnets are sensitive to temperature. If you require resistance above 80°C, inquire about special high-temperature series (H, SH, UH).
Handling guide
Be careful. Rare earth magnets act from a long distance and snap with huge force, often faster than you can move away.
Serious injuries
Watch your fingers. Two large magnets will snap together immediately with a force of several hundred kilograms, destroying anything in their path. Be careful!
No play value
Only for adults. Small elements can be swallowed, causing severe trauma. Keep out of reach of children and animals.
Eye protection
Neodymium magnets are sintered ceramics, which means they are very brittle. Impact of two magnets leads to them cracking into small pieces.
Dust explosion hazard
Fire hazard: Neodymium dust is explosive. Do not process magnets in home conditions as this risks ignition.
Threat to electronics
Avoid bringing magnets close to a purse, laptop, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.
Nickel allergy
Certain individuals suffer from a contact allergy to Ni, which is the typical protective layer for neodymium magnets. Frequent touching can result in a rash. We strongly advise wear protective gloves.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
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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):
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Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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