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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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Strength along with shape of a neodymium magnet can be verified with our
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Technical data - 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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Advantages as well as disadvantages of rare earth magnets.
Pros
- They retain full power for almost 10 years – the loss is just ~1% (in theory),
- Neodymium magnets are characterized by extremely resistant to demagnetization caused by external interference,
- The use of an shiny layer of noble metals (nickel, gold, silver) causes the element to look better,
- Neodymium magnets achieve maximum magnetic induction on a small area, which ensures high operational effectiveness,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Possibility of individual forming and adapting to complex requirements,
- Versatile presence in high-tech industry – they serve a role in mass storage devices, electric drive systems, diagnostic systems, as well as other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in compact constructions
Disadvantages
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
- Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and 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
- They oxidize in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
- We suggest cover - magnetic mount, due to difficulties in realizing threads inside the magnet and complicated forms.
- Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child safety. Furthermore, small components of these magnets are able to complicate diagnosis medical after entering the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities
Lifting parameters
Maximum lifting force for a neodymium magnet – what contributes to it?
- with the application of a yoke made of special test steel, guaranteeing maximum field concentration
- with a thickness minimum 10 mm
- characterized by smoothness
- with total lack of distance (no paint)
- for force applied at a right angle (pull-off, not shear)
- at standard ambient temperature
Practical aspects of lifting capacity – factors
- Distance (between the magnet and the plate), because even a tiny clearance (e.g. 0.5 mm) results in a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Base massiveness – insufficiently thick sheet does not close the flux, causing part of the flux to be wasted into the air.
- Metal type – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
- Base smoothness – the more even the surface, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
- Heat – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Holding force was tested on the plate surface of 20 mm thickness, when a perpendicular force was applied, however under shearing force the holding force is lower. Additionally, even a slight gap between the magnet and the plate lowers the lifting capacity.
Safety rules for work with neodymium magnets
Dust explosion hazard
Dust generated during machining of magnets is combustible. Avoid drilling into magnets unless you are an expert.
Pacemakers
Individuals with a ICD have to keep an large gap from magnets. The magnetism can disrupt the functioning of the life-saving device.
Powerful field
Exercise caution. Rare earth magnets act from a distance and connect with huge force, often quicker than you can move away.
Heat sensitivity
Regular neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. Damage is permanent.
Shattering risk
NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Clashing of two magnets leads to them cracking into shards.
Threat to electronics
Intense magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Stay away of min. 10 cm.
Sensitization to coating
Certain individuals experience a sensitization to Ni, which is the typical protective layer for neodymium magnets. Prolonged contact might lead to dermatitis. We suggest wear safety gloves.
Crushing risk
Pinching hazard: The attraction force is so immense that it can result in hematomas, pinching, and even bone fractures. Protective gloves are recommended.
Product not for children
Neodymium magnets are not intended for children. Swallowing multiple magnets can lead to them attracting across intestines, which poses a severe health hazard and necessitates urgent medical intervention.
Impact on smartphones
Navigation devices and smartphones are highly susceptible to magnetism. Direct contact with a strong magnet can permanently damage the internal compass in your phone.
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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