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UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread
magnetic holder external thread
Catalog no 190322
GTIN/EAN: 5906301813811
Diameter Ø
20 mm [±1 mm]
Height
15 mm [±1 mm]
Height
7 mm [±1 mm]
Weight
14 g
Load capacity
9.00 kg / 88.26 N
7.22 ZŁ with VAT / pcs + price for transport
5.87 ZŁ net + 23% VAT / pcs
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Technical of the product - UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread
Specification / characteristics - UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread
| properties | values |
|---|---|
| Cat. no. | 190322 |
| GTIN/EAN | 5906301813811 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 20 mm [±1 mm] |
| Height | 15 mm [±1 mm] |
| Height | 7 mm [±1 mm] |
| Weight | 14 g |
| Load capacity ~ ? | 9.00 kg / 88.26 N |
| 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 |
Elemental analysis
| 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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Pros as well as cons of Nd2Fe14B magnets.
Strengths
- They have constant strength, and over around ten years their attraction force decreases symbolically – ~1% (according to theory),
- They possess excellent resistance to magnetism drop as a result of opposing magnetic fields,
- In other words, due to the glossy finish of silver, the element becomes visually attractive,
- 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 resistance, enabling action at temperatures reaching 230°C and above...
- In view of the option of precise shaping and customization to individualized projects, neodymium magnets can be modeled in a broad palette of geometric configurations, which amplifies use scope,
- Significant place in innovative solutions – they are utilized in hard drives, electric drive systems, precision medical tools, also modern systems.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Disadvantages
- 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
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- They rust in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- We suggest cover - magnetic holder, due to difficulties in realizing nuts inside the magnet and complicated shapes.
- Potential hazard related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the context of child safety. Additionally, tiny parts of these devices can disrupt the diagnostic process medical in case of swallowing.
- With budget limitations the cost of neodymium magnets is economically unviable,
Holding force characteristics
Best holding force of the magnet in ideal parameters – what affects it?
- on a base made of structural steel, effectively closing the magnetic field
- possessing a thickness of at least 10 mm to ensure full flux closure
- with a plane free of scratches
- under conditions of no distance (surface-to-surface)
- during pulling in a direction perpendicular to the plane
- in neutral thermal conditions
Practical aspects of lifting capacity – factors
- Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
- Loading method – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of maximum force).
- Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
- Material composition – different alloys reacts the same. Alloy additives worsen the attraction effect.
- Surface finish – full contact is possible only on polished steel. Rough texture create air cushions, reducing force.
- Temperature – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.
Holding force was measured on the plate surface of 20 mm thickness, when a perpendicular force was applied, whereas under parallel forces the holding force is lower. Additionally, even a small distance between the magnet and the plate reduces the load capacity.
Warnings
Keep away from children
Neodymium magnets are not intended for children. Eating several magnets can lead to them connecting inside the digestive tract, which poses a severe health hazard and requires urgent medical intervention.
Safe distance
Avoid bringing magnets near a wallet, computer, or TV. The magnetism can permanently damage these devices and wipe information from cards.
Thermal limits
Regular neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. This process is irreversible.
Warning for heart patients
Warning for patients: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or request help to handle the magnets.
Immense force
Use magnets consciously. Their powerful strength can shock even professionals. Be vigilant and respect their power.
Physical harm
Mind your fingers. Two powerful magnets will snap together immediately with a force of several hundred kilograms, crushing everything in their path. Be careful!
Threat to navigation
An intense magnetic field interferes with the operation of magnetometers in smartphones and navigation systems. Keep magnets close to a device to avoid breaking the sensors.
Fragile material
Despite the nickel coating, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may shatter into hazardous fragments.
Nickel allergy
Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If an allergic reaction appears, cease handling magnets and wear gloves.
Flammability
Fire warning: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this may cause fire.
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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