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UMGGZ 88x8.5 [M8] GZ / N38 - rubber magnetic holder external thread
rubber magnetic holder external thread
Catalog no 340313
GTIN/EAN: 5906301814757
Diameter Ø
88 mm [±1 mm]
Height
8.5 mm [±1 mm]
Weight
193 g
Load capacity
42.90 kg / 420.71 N
40.59 ZŁ with VAT / pcs + price for transport
33.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical data - UMGGZ 88x8.5 [M8] GZ / N38 - rubber magnetic holder external thread
Specification / characteristics - UMGGZ 88x8.5 [M8] GZ / N38 - rubber magnetic holder external thread
| properties | values |
|---|---|
| Cat. no. | 340313 |
| GTIN/EAN | 5906301814757 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 88 mm [±1 mm] |
| Height | 8.5 mm [±1 mm] |
| Weight | 193 g |
| Load capacity ~ ? | 42.90 kg / 420.71 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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Check out also proposals
Strengths and weaknesses of neodymium magnets.
Benefits
- Their power remains stable, and after approximately 10 years it drops only by ~1% (theoretically),
- They are noted for resistance to demagnetization induced by external field influence,
- A magnet with a shiny nickel surface looks better,
- The surface of neodymium magnets generates a unique magnetic field – this is a key feature,
- Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
- Possibility of precise creating as well as optimizing to defined needs,
- Universal use in advanced technology sectors – they serve a role in HDD drives, electric motors, advanced medical instruments, also modern systems.
- Thanks to concentrated force, small magnets offer high operating force, with minimal size,
Limitations
- To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution secures the magnet and simultaneously increases its durability.
- NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Limited possibility of producing threads in the magnet and complicated shapes - recommended is a housing - magnetic holder.
- Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which is particularly important in the context of child safety. It is also worth noting that tiny parts of these products can be problematic in diagnostics medical after entering the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities
Holding force characteristics
Maximum magnetic pulling force – what it depends on?
- with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
- with a thickness of at least 10 mm
- characterized by even structure
- under conditions of gap-free contact (surface-to-surface)
- during pulling in a direction vertical to the plane
- in stable room temperature
What influences lifting capacity in practice
- Space between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Loading method – declared lifting capacity refers to detachment vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
- Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet restricts the lifting capacity (the magnet "punches through" it).
- Material type – the best choice is pure iron steel. Hardened steels may attract less.
- Surface condition – smooth surfaces ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
- Thermal conditions – NdFeB sinters have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).
Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet and the plate decreases the lifting capacity.
Precautions when working with neodymium magnets
Handling guide
Handle magnets with awareness. Their huge power can surprise even professionals. Plan your moves and respect their force.
Power loss in heat
Standard neodymium magnets (grade N) lose power when the temperature exceeds 80°C. This process is irreversible.
Hand protection
Mind your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing everything in their path. Be careful!
Skin irritation risks
Warning for allergy sufferers: The Ni-Cu-Ni coating contains nickel. If redness happens, immediately stop handling magnets and use protective gear.
Phone sensors
An intense magnetic field negatively affects the functioning of compasses in smartphones and navigation systems. Do not bring magnets close to a device to avoid damaging the sensors.
Pacemakers
Warning for patients: Powerful magnets disrupt electronics. Keep at least 30 cm distance or request help to handle the magnets.
Cards and drives
Do not bring magnets close to a wallet, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.
This is not a toy
Neodymium magnets are not toys. Swallowing a few magnets may result in them pinching intestinal walls, which constitutes a direct threat to life and necessitates immediate surgery.
Mechanical processing
Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Beware of splinters
Beware of splinters. Magnets can explode upon violent connection, ejecting shards into the air. Eye protection is mandatory.
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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