UMS 48x18x8.5x11.5 / N38 - conical magnetic holder
conical magnetic holder
Catalog no 220403
GTIN/EAN: 5906301814221
- Diameter Ø
- 48 mm [±1 mm]
- cone dimension Ø
- 18x8.5 mm [±1 mm]
- Height
- 11.5 mm [±1 mm]
- Weight
- 125 g
- Magnetization Direction
- ↑ axial
- Coating
- [NiCuNi] Nickel
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Detailed specification - UMS 48x18x8.5x11.5 / N38 - conical magnetic holder
Specification / characteristics - UMS 48x18x8.5x11.5 / N38 - conical magnetic holder
| properties | values |
|---|---|
| Cat. no. | 220403 |
| GTIN/EAN | 5906301814221 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 48 mm [±1 mm] |
| cone dimension Ø | 18x8.5 mm [±1 mm] |
| Height | 11.5 mm [±1 mm] |
| Weight | 125 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 68.00 kg / 666.85 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other products
Pros as well as cons of rare earth magnets.
Advantages
- They have stable power, and over more than ten years their attraction force decreases symbolically – ~1% (in testing),
- They are noted for resistance to demagnetization induced by presence of other magnetic fields,
- Thanks to the glossy finish, the plating of nickel, gold-plated, or silver gives an visually attractive appearance,
- Magnets exhibit excellent magnetic induction on the outer side,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
- Possibility of precise creating as well as modifying to precise applications,
- Key role in high-tech industry – they serve a role in hard drives, electric drive systems, precision medical tools, as well as complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in compact constructions
Limitations
- To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
- 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
- Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Limited ability of making nuts in the magnet and complex shapes - preferred is casing - magnet mounting.
- Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small components of these devices can complicate diagnosis medical in case of swallowing.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Holding force characteristics
Highest magnetic holding force – what affects it?
- with the use of a yoke made of special test steel, ensuring full magnetic saturation
- possessing a thickness of at least 10 mm to avoid saturation
- with an ground contact surface
- without the slightest insulating layer between the magnet and steel
- under vertical force vector (90-degree angle)
- in neutral thermal conditions
What influences lifting capacity in practice
- Distance – existence of any layer (paint, tape, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
- Loading method – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits much less (typically approx. 20-30% of nominal force).
- Base massiveness – insufficiently thick steel does not close the flux, causing part of the flux to be wasted into the air.
- Steel type – low-carbon steel attracts best. Alloy admixtures decrease magnetic properties and holding force.
- Smoothness – full contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
- Temperature – temperature increase results in weakening of force. Check the thermal limit for a given model.
Lifting capacity was assessed with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate decreases the holding force.
Precautions when working with neodymium magnets
Allergic reactions
Medical facts indicate that nickel (the usual finish) is a potent allergen. For allergy sufferers, prevent touching magnets with bare hands or choose versions in plastic housing.
Choking Hazard
NdFeB magnets are not intended for children. Eating multiple magnets may result in them pinching intestinal walls, which constitutes a severe health hazard and necessitates immediate surgery.
Threat to electronics
Powerful magnetic fields can destroy records on payment cards, hard drives, and other magnetic media. Stay away of min. 10 cm.
Precision electronics
Remember: rare earth magnets produce a field that disrupts sensitive sensors. Keep a safe distance from your phone, device, and navigation systems.
Do not drill into magnets
Mechanical processing of neodymium magnets poses a fire risk. Magnetic powder reacts violently with oxygen and is difficult to extinguish.
ICD Warning
Life threat: Neodymium magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.
Respect the power
Before starting, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.
Heat warning
Do not overheat. NdFeB magnets are susceptible to temperature. If you need operation above 80°C, inquire about HT versions (H, SH, UH).
Beware of splinters
Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting shards into the air. Wear goggles.
Bodily injuries
Danger of trauma: The pulling power is so great that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.
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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