NCM 20x13.5x5 / N38 - channel magnetic holder
channel magnetic holder
Catalog no 360487
GTIN/EAN: 5906301814863
Diameter Ø
20 mm [±1 mm]
Height
13.5 mm [±1 mm]
Weight
9.2 g
Magnetization Direction
↑ axial
Load capacity
8.00 kg / 78.45 N
Coating
[NiCuNi] Nickel
7.29 ZŁ with VAT / pcs + price for transport
5.93 ZŁ net + 23% VAT / pcs
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Technical details - NCM 20x13.5x5 / N38 - channel magnetic holder
Specification / characteristics - NCM 20x13.5x5 / N38 - channel magnetic holder
| properties | values |
|---|---|
| Cat. no. | 360487 |
| GTIN/EAN | 5906301814863 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 20 mm [±1 mm] |
| Height | 13.5 mm [±1 mm] |
| Weight | 9.2 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 8.00 kg / 78.45 N |
| 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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Advantages and disadvantages of rare earth magnets.
Pros
- They have unchanged lifting capacity, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
- They retain their magnetic properties even under close interference source,
- In other words, due to the shiny surface of gold, the element looks attractive,
- Neodymium magnets achieve maximum magnetic induction on a small area, which allows for strong attraction,
- Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures reaching 230°C and above...
- Due to the potential of free molding and customization to custom requirements, magnetic components can be modeled in a wide range of geometric configurations, which amplifies use scope,
- Universal use in modern technologies – they are commonly used in HDD drives, drive modules, diagnostic systems, and technologically advanced constructions.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which enables their usage in small systems
Weaknesses
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and 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 advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- Limited ability of creating nuts in the magnet and complex shapes - preferred is cover - magnet mounting.
- Potential hazard resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, tiny parts of these magnets are able to complicate diagnosis medical when they are in the body.
- Due to complex production process, their price is higher than average,
Lifting parameters
Detachment force of the magnet in optimal conditions – what contributes to it?
- on a block made of structural steel, perfectly concentrating the magnetic flux
- whose thickness is min. 10 mm
- characterized by even structure
- with direct contact (without impurities)
- under vertical application of breakaway force (90-degree angle)
- at temperature approx. 20 degrees Celsius
Determinants of practical lifting force of a magnet
- Distance – the presence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
- Force direction – declared lifting capacity refers to detachment vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of nominal force).
- Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the lifting capacity (the magnet "punches through" it).
- Steel grade – ideal substrate is high-permeability steel. Stainless steels may have worse magnetic properties.
- Surface quality – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
- Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).
Lifting capacity testing was conducted on plates with a smooth surface of suitable thickness, under perpendicular forces, however under shearing force the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate decreases the holding force.
Safe handling of NdFeB magnets
Risk of cracking
Beware of splinters. Magnets can explode upon violent connection, ejecting sharp fragments into the air. Eye protection is mandatory.
Nickel allergy
A percentage of the population suffer from a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Frequent touching may cause skin redness. We strongly advise wear protective gloves.
Maximum temperature
Standard neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. Damage is permanent.
No play value
Always store magnets away from children. Choking hazard is high, and the consequences of magnets clamping inside the body are very dangerous.
Crushing force
Big blocks can crush fingers in a fraction of a second. Never put your hand between two attracting surfaces.
ICD Warning
Health Alert: Strong magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.
Threat to electronics
Device Safety: Neodymium magnets can damage data carriers and sensitive devices (pacemakers, hearing aids, mechanical watches).
Fire risk
Dust generated during machining of magnets is flammable. Do not drill into magnets unless you are an expert.
Compass and GPS
Remember: rare earth magnets generate a field that confuses sensitive sensors. Maintain a separation from your mobile, tablet, and navigation systems.
Safe operation
Use magnets consciously. Their powerful strength can shock even experienced users. Plan your moves and do not underestimate their force.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
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14.99 ZŁ
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Płatność przy odbiorze (pobranie):
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Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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