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UMGGW 66x8.5 [M8] GW / N38 - magnetic holder rubber internal thread
magnetic holder rubber internal thread
Catalog no 160308
GTIN/EAN: 5906301813668
Diameter Ø
66 mm [±1 mm]
Height
8.5 mm [±1 mm]
Weight
100 g
Load capacity
18.40 kg / 180.44 N
23.37 ZŁ with VAT / pcs + price for transport
19.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical details - UMGGW 66x8.5 [M8] GW / N38 - magnetic holder rubber internal thread
Specification / characteristics - UMGGW 66x8.5 [M8] GW / N38 - magnetic holder rubber internal thread
| properties | values |
|---|---|
| Cat. no. | 160308 |
| GTIN/EAN | 5906301813668 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 66 mm [±1 mm] |
| Height | 8.5 mm [±1 mm] |
| Weight | 100 g |
| Load capacity ~ ? | 18.40 kg / 180.44 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 |
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 |
See also proposals
Advantages and disadvantages of neodymium magnets.
Advantages
- They have constant strength, and over more than 10 years their performance decreases symbolically – ~1% (in testing),
- Neodymium magnets prove to be extremely resistant to loss of magnetic properties caused by external field sources,
- By using a shiny coating of nickel, the element gains an proper look,
- Magnetic induction on the working part of the magnet remains maximum,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the shape) even at a temperature of 230°C or more...
- Thanks to modularity in constructing and the ability to customize to unusual requirements,
- Universal use in modern technologies – they are used in computer drives, motor assemblies, medical equipment, as well as other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which makes them useful in compact constructions
Weaknesses
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also increases their durability
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- Due to the susceptibility of magnets to corrosion in a humid environment, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
- Due to limitations in creating nuts and complicated shapes in magnets, we recommend using a housing - magnetic mechanism.
- Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which gains importance in the aspect of protecting the youngest. Furthermore, small elements of these devices can complicate diagnosis medical after entering the body.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Lifting parameters
Magnetic strength at its maximum – what affects it?
- using a sheet made of low-carbon steel, serving as a magnetic yoke
- with a thickness no less than 10 mm
- with an ideally smooth touching surface
- without the slightest air gap between the magnet and steel
- under vertical application of breakaway force (90-degree angle)
- at standard ambient temperature
Practical aspects of lifting capacity – factors
- Gap between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) significantly weakens the pulling force, often by half at just 0.5 mm.
- Pull-off angle – note that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the maximum value.
- Substrate thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet restricts the attraction force (the magnet "punches through" it).
- Material type – the best choice is high-permeability steel. Cast iron may generate lower lifting capacity.
- Surface quality – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
- Temperature influence – hot environment weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate lowers the holding force.
Precautions when working with NdFeB magnets
Crushing risk
Danger of trauma: The attraction force is so great that it can cause blood blisters, crushing, and even bone fractures. Protective gloves are recommended.
Do not overheat magnets
Regular neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. This process is irreversible.
Pacemakers
Patients with a ICD should maintain an absolute distance from magnets. The magnetism can stop the operation of the implant.
Precision electronics
An intense magnetic field interferes with the operation of magnetometers in phones and navigation systems. Do not bring magnets near a smartphone to prevent damaging the sensors.
Safe operation
Handle with care. Rare earth magnets attract from a distance and snap with huge force, often faster than you can react.
Magnet fragility
NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Collision of two magnets will cause them shattering into shards.
Machining danger
Fire hazard: Neodymium dust is explosive. Do not process magnets without safety gear as this may cause fire.
Avoid contact if allergic
Medical facts indicate that the nickel plating (standard magnet coating) is a common allergen. If you have an allergy, avoid direct skin contact or choose versions in plastic housing.
Electronic hazard
Avoid bringing magnets close to a wallet, laptop, or TV. The magnetism can destroy these devices and erase data from cards.
Product not for children
Always keep magnets away from children. Choking hazard is significant, and the effects of magnets connecting inside the body are tragic.
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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