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
bulk discounts:
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Physical properties - 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 |
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Strengths as well as weaknesses of neodymium magnets.
Strengths
- Their power is maintained, and after approximately 10 years it drops only by ~1% (according to research),
- They feature excellent resistance to magnetic field loss when exposed to opposing magnetic fields,
- Thanks to the elegant finish, the plating of Ni-Cu-Ni, gold-plated, or silver-plated gives an visually attractive appearance,
- They show high magnetic induction at the operating surface, which affects their effectiveness,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- In view of the ability of precise shaping and adaptation to individualized needs, NdFeB magnets can be manufactured in a wide range of forms and dimensions, which expands the range of possible applications,
- Universal use in modern industrial fields – they are used in computer drives, motor assemblies, medical devices, as well as modern systems.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in miniature devices
Weaknesses
- To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- When exposed to high temperature, neodymium magnets suffer a drop in strength. Often, when the temperature exceeds 80°C, their power 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 oxidize in a humid environment - during use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Due to limitations in creating nuts and complicated shapes in magnets, we propose using cover - magnetic mechanism.
- Health risk to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child health protection. It is also worth noting that small components of these magnets are able to disrupt the diagnostic process medical after entering the body.
- Due to expensive raw materials, their price is higher than average,
Lifting parameters
Breakaway strength of the magnet in ideal conditions – what contributes to it?
- using a plate made of high-permeability steel, serving as a ideal flux conductor
- whose transverse dimension reaches at least 10 mm
- with a surface cleaned and smooth
- with direct contact (no paint)
- under perpendicular force direction (90-degree angle)
- at room temperature
Magnet lifting force in use – key factors
- Distance – the presence of any layer (rust, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (typically 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).
- Metal type – not every steel reacts the same. Alloy additives worsen the interaction with the magnet.
- Plate texture – ground elements ensure maximum contact, which improves field saturation. Rough surfaces weaken the grip.
- Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and in frost gain strength (up to a certain limit).
Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate decreases the holding force.
Safety rules for work with neodymium magnets
Do not overheat magnets
Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and strength.
ICD Warning
For implant holders: Strong magnetic fields disrupt medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.
Cards and drives
Do not bring magnets near a purse, laptop, or screen. The magnetic field can destroy these devices and erase data from cards.
Product not for children
These products are not toys. Accidental ingestion of a few magnets can lead to them attracting across intestines, which poses a severe health hazard and requires immediate surgery.
Keep away from electronics
Remember: rare earth magnets generate a field that disrupts precision electronics. Keep a separation from your phone, tablet, and navigation systems.
Skin irritation risks
Certain individuals have a sensitization to Ni, which is the standard coating for NdFeB magnets. Prolonged contact can result in a rash. We strongly advise use safety gloves.
Physical harm
Mind your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!
Handling guide
Use magnets with awareness. Their immense force can shock even professionals. Plan your moves and do not underestimate their power.
Fire risk
Fire hazard: Rare earth powder is explosive. Do not process magnets in home conditions as this risks ignition.
Material brittleness
Despite metallic appearance, the material is delicate and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.
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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