WM 34.5x24.3x17 / N38 - magnetic hanger
magnetic hanger
Catalog no 240215
GTIN/EAN: 5906301814382
length
34.5 mm [±1 mm]
Width
24.3 mm [±1 mm]
Height
17 mm [±1 mm]
Weight
9 g
Coating
[NiCuNi] Nickel
4.99 ZŁ with VAT / pcs + price for transport
4.06 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical parameters - WM 34.5x24.3x17 / N38 - magnetic hanger
Specification / characteristics - WM 34.5x24.3x17 / N38 - magnetic hanger
| properties | values |
|---|---|
| Cat. no. | 240215 |
| GTIN/EAN | 5906301814382 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| length | 34.5 mm [±1 mm] |
| Width | 24.3 mm [±1 mm] |
| Height | 17 mm [±1 mm] |
| Weight | 9 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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Advantages as well as disadvantages of neodymium magnets.
Strengths
- Their power is durable, and after around ten years it drops only by ~1% (according to research),
- They maintain their magnetic properties even under close interference source,
- Thanks to the shiny finish, the layer of Ni-Cu-Ni, gold, or silver-plated gives an clean appearance,
- Magnets are distinguished by huge magnetic induction on the outer layer,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
- Thanks to freedom in forming and the ability to modify to specific needs,
- Significant place in advanced technology sectors – they are used in HDD drives, motor assemblies, medical devices, as well as other advanced devices.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Disadvantages
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
- When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- We recommend cover - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated shapes.
- Health risk to health – tiny shards of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Additionally, small components of these magnets can be problematic in diagnostics medical in case of swallowing.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities
Pull force analysis
Maximum lifting capacity of the magnet – what affects it?
- using a base made of low-carbon steel, functioning as a circuit closing element
- with a thickness no less than 10 mm
- with a plane perfectly flat
- without any clearance between the magnet and steel
- during detachment in a direction perpendicular to the mounting surface
- at standard ambient temperature
Lifting capacity in practice – influencing factors
- Clearance – existence of foreign body (paint, tape, air) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
- Load vector – highest force is available only during perpendicular pulling. The resistance to sliding of the magnet along the plate is usually several times smaller (approx. 1/5 of the lifting capacity).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the attraction force (the magnet "punches through" it).
- Material composition – different alloys attracts identically. High carbon content worsen the interaction with the magnet.
- Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Rough surfaces reduce efficiency.
- Thermal conditions – NdFeB sinters have a negative temperature coefficient. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).
Lifting capacity testing was performed on a smooth plate of suitable thickness, under perpendicular forces, in contrast under attempts to slide the magnet the load capacity is reduced by as much as fivefold. In addition, even a slight gap between the magnet and the plate lowers the lifting capacity.
Warnings
Handling rules
Exercise caution. Neodymium magnets attract from a distance and connect with massive power, often faster than you can react.
Protect data
Device Safety: Strong magnets can ruin data carriers and delicate electronics (pacemakers, hearing aids, mechanical watches).
Warning for allergy sufferers
Allergy Notice: The Ni-Cu-Ni coating contains nickel. If skin irritation appears, immediately stop working with magnets and wear gloves.
Crushing force
Big blocks can break fingers in a fraction of a second. Do not put your hand between two attracting surfaces.
Heat warning
Regular neodymium magnets (N-type) lose power when the temperature goes above 80°C. Damage is permanent.
Machining danger
Fire hazard: Rare earth powder is explosive. Avoid machining magnets without safety gear as this risks ignition.
Life threat
Warning for patients: Powerful magnets affect electronics. Keep minimum 30 cm distance or ask another person to work with the magnets.
Precision electronics
An intense magnetic field interferes with the functioning of magnetometers in smartphones and navigation systems. Keep magnets near a device to prevent breaking the sensors.
Do not give to children
Always keep magnets away from children. Choking hazard is high, and the consequences of magnets connecting inside the body are fatal.
Material brittleness
Neodymium magnets are sintered ceramics, meaning they are very brittle. Clashing of two magnets will cause them cracking into small pieces.
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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