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UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread
magnetic holder external thread
Catalog no 190332
GTIN/EAN: 5906301813859
Diameter Ø
42 mm [±1 mm]
Height
20 mm [±1 mm]
Height
9 mm [±1 mm]
Weight
80 g
Load capacity
66.00 kg / 647.24 N
33.96 ZŁ with VAT / pcs + price for transport
27.61 ZŁ net + 23% VAT / pcs
bulk discounts:
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Lifting power as well as appearance of neodymium magnets can be checked on our
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Orders placed before 14:00 will be shipped the same business day.
Technical of the product - UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread
Specification / characteristics - UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread
| properties | values |
|---|---|
| Cat. no. | 190332 |
| GTIN/EAN | 5906301813859 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 42 mm [±1 mm] |
| Height | 20 mm [±1 mm] |
| Height | 9 mm [±1 mm] |
| Weight | 80 g |
| Load capacity ~ ? | 66.00 kg / 647.24 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Pros and cons of Nd2Fe14B magnets.
Advantages
- Their magnetic field is durable, and after approximately 10 years it decreases only by ~1% (theoretically),
- They feature excellent resistance to weakening of magnetic properties due to external magnetic sources,
- In other words, due to the metallic surface of gold, the element is aesthetically pleasing,
- Magnetic induction on the working layer of the magnet is strong,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- Possibility of precise modeling as well as modifying to individual needs,
- Huge importance in modern technologies – they find application in data components, motor assemblies, diagnostic systems, also industrial machines.
- Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in compact constructions
Cons
- To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
- Neodymium magnets decrease their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- 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.
- Limited possibility of making threads in the magnet and complicated forms - preferred is cover - mounting mechanism.
- Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these products can complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities
Lifting parameters
Highest magnetic holding force – what it depends on?
- with the contact of a sheet made of low-carbon steel, ensuring maximum field concentration
- whose transverse dimension is min. 10 mm
- with an ground touching surface
- with total lack of distance (no coatings)
- during detachment in a direction perpendicular to the mounting surface
- in stable room temperature
Magnet lifting force in use – key factors
- Gap between surfaces – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet exhibits significantly lower power (often approx. 20-30% of maximum force).
- Element 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 reacts the same. High carbon content weaken the attraction effect.
- Surface quality – the smoother and more polished the plate, the larger the contact zone and stronger the hold. Roughness acts like micro-gaps.
- Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).
Holding force was measured on the plate surface of 20 mm thickness, when the force acted perpendicularly, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. In addition, even a small distance between the magnet and the plate lowers the load capacity.
Safety rules for work with neodymium magnets
Protective goggles
Neodymium magnets are ceramic materials, meaning they are very brittle. Clashing of two magnets will cause them cracking into small pieces.
Maximum temperature
Regular neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.
GPS and phone interference
Be aware: neodymium magnets produce a field that confuses sensitive sensors. Keep a separation from your phone, tablet, and GPS.
Conscious usage
Exercise caution. Neodymium magnets act from a long distance and snap with massive power, often faster than you can move away.
Finger safety
Risk of injury: The attraction force is so great that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.
Magnetic media
Powerful magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Stay away of at least 10 cm.
Metal Allergy
It is widely known that nickel (standard magnet coating) is a strong allergen. If your skin reacts to metals, avoid touching magnets with bare hands or choose coated magnets.
Keep away from children
Always store magnets out of reach of children. Choking hazard is high, and the consequences of magnets clamping inside the body are tragic.
Do not drill into magnets
Dust generated during cutting of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
Implant safety
Warning for patients: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or ask another person to work with the magnets.
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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