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HH 16x5.3 [M3] / N38 - through hole magnetic holder
through hole magnetic holder
Catalog no 370480
GTIN/EAN: 5906301814900
Diameter Ø
16 mm [±1 mm]
Height
5.3 mm [±1 mm]
Weight
6.4 g
Magnetization Direction
↑ axial
Load capacity
4.00 kg / 39.23 N
Coating
[NiCuNi] Nickel
3.32 ZŁ with VAT / pcs + price for transport
2.70 ZŁ net + 23% VAT / pcs
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Physical properties - HH 16x5.3 [M3] / N38 - through hole magnetic holder
Specification / characteristics - HH 16x5.3 [M3] / N38 - through hole magnetic holder
| properties | values |
|---|---|
| Cat. no. | 370480 |
| GTIN/EAN | 5906301814900 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 16 mm [±1 mm] |
| Height | 5.3 mm [±1 mm] |
| Weight | 6.4 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 4.00 kg / 39.23 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 |
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 |
Other products
Strengths and weaknesses of neodymium magnets.
Advantages
- They do not lose strength, even during approximately 10 years – the drop in power is only ~1% (theoretically),
- Magnets effectively protect themselves against loss of magnetization caused by external fields,
- By using a decorative layer of gold, the element has an professional look,
- The surface of neodymium magnets generates a intense magnetic field – this is a key feature,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures reaching 230°C and above...
- Possibility of detailed machining as well as optimizing to precise conditions,
- Versatile presence in future technologies – they find application in data components, electromotive mechanisms, advanced medical instruments, also multitasking production systems.
- Thanks to concentrated force, small magnets offer high operating force, in miniature format,
Limitations
- At strong impacts they can break, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
- Limited possibility of producing nuts in the magnet and complicated shapes - recommended is cover - magnet mounting.
- Health risk related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that small elements of these magnets can be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Pull force analysis
Detachment force of the magnet in optimal conditions – what affects it?
- using a sheet made of low-carbon steel, functioning as a circuit closing element
- possessing a massiveness of minimum 10 mm to ensure full flux closure
- with an ideally smooth contact surface
- with direct contact (without impurities)
- for force acting at a right angle (in the magnet axis)
- at standard ambient temperature
Lifting capacity in real conditions – factors
- Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
- Load vector – highest force is reached only during perpendicular pulling. The resistance to sliding of the magnet along the surface is usually many times lower (approx. 1/5 of the lifting capacity).
- Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
- Plate material – mild steel gives the best results. Higher carbon content reduce magnetic permeability and lifting capacity.
- Smoothness – ideal contact is possible only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).
Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet and the plate reduces the lifting capacity.
Safety rules for work with neodymium magnets
Allergy Warning
Certain individuals suffer from a contact allergy to Ni, which is the standard coating for neodymium magnets. Frequent touching can result in a rash. We strongly advise wear protective gloves.
Precision electronics
GPS units and smartphones are extremely susceptible to magnetic fields. Direct contact with a strong magnet can ruin the internal compass in your phone.
Safe distance
Avoid bringing magnets close to a purse, computer, or screen. The magnetism can destroy these devices and wipe information from cards.
Combustion hazard
Combustion risk: Rare earth powder is explosive. Avoid machining magnets without safety gear as this may cause fire.
No play value
NdFeB magnets are not toys. Eating several magnets may result in them attracting across intestines, which constitutes a critical condition and requires immediate surgery.
Physical harm
Danger of trauma: The pulling power is so great that it can cause hematomas, crushing, and broken bones. Use thick gloves.
Medical interference
Life threat: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have electronic implants.
Conscious usage
Before use, read the rules. Sudden snapping can break the magnet or injure your hand. Be predictive.
Heat warning
Control the heat. Exposing the magnet to high heat will destroy its properties and pulling force.
Material brittleness
Watch out for shards. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. Eye protection is mandatory.
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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