UMS 20x8.6x4.5x7 / N38 - conical magnetic holder
conical magnetic holder
Catalog no 220327
GTIN/EAN: 5906301814177
Diameter Ø
20 mm [±1 mm]
cone dimension Ø
8.6x4.5 mm [±1 mm]
Height
7 mm [±1 mm]
Weight
12 g
Magnetization Direction
↑ axial
Load capacity
6.00 kg / 58.84 N
Coating
[NiCuNi] Nickel
6.46 ZŁ with VAT / pcs + price for transport
5.25 ZŁ net + 23% VAT / pcs
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Technical of the product - UMS 20x8.6x4.5x7 / N38 - conical magnetic holder
Specification / characteristics - UMS 20x8.6x4.5x7 / N38 - conical magnetic holder
| properties | values |
|---|---|
| Cat. no. | 220327 |
| GTIN/EAN | 5906301814177 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 20 mm [±1 mm] |
| cone dimension Ø | 8.6x4.5 mm [±1 mm] |
| Height | 7 mm [±1 mm] |
| Weight | 12 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 6.00 kg / 58.84 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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Check out also proposals
Strengths as well as weaknesses of neodymium magnets.
Strengths
- They retain magnetic properties for almost 10 years – the drop is just ~1% (based on simulations),
- Neodymium magnets are extremely resistant to loss of magnetic properties caused by external field sources,
- The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to have aesthetics,
- Magnets exhibit impressive magnetic induction on the outer side,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling action at temperatures reaching 230°C and above...
- Thanks to the possibility of precise forming and adaptation to custom projects, magnetic components can be created in a broad palette of shapes and sizes, which expands the range of possible applications,
- Wide application in future technologies – they are commonly used in mass storage devices, electric drive systems, advanced medical instruments, as well as complex engineering applications.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Cons
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets using a steel holder. Such protection not only shields the magnet but also increases its resistance to damage
- NdFeB magnets demagnetize 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
- When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
- We suggest cover - magnetic holder, due to difficulties in producing threads inside the magnet and complicated shapes.
- Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, tiny parts of these magnets are able to be problematic in diagnostics medical after entering the body.
- With mass production the cost of neodymium magnets is a challenge,
Holding force characteristics
Detachment force of the magnet in optimal conditions – what it depends on?
- with the application of a yoke made of special test steel, ensuring full magnetic saturation
- with a cross-section of at least 10 mm
- characterized by even structure
- with zero gap (without coatings)
- for force applied at a right angle (in the magnet axis)
- at standard ambient temperature
Practical aspects of lifting capacity – factors
- Clearance – existence of any layer (rust, tape, air) interrupts the magnetic circuit, which reduces capacity steeply (even by 50% at 0.5 mm).
- Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
- Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field passes through the material instead of converting into lifting capacity.
- Material type – ideal substrate is high-permeability steel. Hardened steels may attract less.
- Surface finish – full contact is obtained only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
- Temperature influence – hot environment reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate lowers the holding force.
Safety rules for work with NdFeB magnets
Crushing force
Big blocks can break fingers instantly. Do not place your hand between two attracting surfaces.
Magnetic media
Do not bring magnets near a purse, laptop, or TV. The magnetism can destroy these devices and erase data from cards.
Implant safety
Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have medical devices.
Demagnetization risk
Watch the temperature. Exposing the magnet to high heat will destroy its magnetic structure and strength.
Impact on smartphones
An intense magnetic field disrupts the operation of magnetometers in phones and navigation systems. Do not bring magnets near a device to avoid damaging the sensors.
Metal Allergy
Warning for allergy sufferers: The Ni-Cu-Ni coating consists of nickel. If skin irritation happens, immediately stop handling magnets and use protective gear.
Do not give to children
Product intended for adults. Small elements pose a choking risk, leading to serious injuries. Keep away from children and animals.
Beware of splinters
Neodymium magnets are sintered ceramics, which means they are prone to chipping. Collision of two magnets will cause them shattering into shards.
Mechanical processing
Machining of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Handling guide
Use magnets with awareness. Their powerful strength can shock even professionals. Stay alert and do not underestimate their power.
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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