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UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread
magnetic holder rubber internal thread
Catalog no 160306
GTIN/EAN: 5906301813644
Diameter Ø
34 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
22 g
Load capacity
7.70 kg / 75.51 N
9.84 ZŁ with VAT / pcs + price for transport
8.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Lifting power along with structure of a magnet can be reviewed on our
force calculator.
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Physical properties - UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread
Specification / characteristics - UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread
| properties | values |
|---|---|
| Cat. no. | 160306 |
| GTIN/EAN | 5906301813644 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 34 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 22 g |
| Load capacity ~ ? | 7.70 kg / 75.51 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% |
Sustainability
| 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 rare earth magnets.
Advantages
- Their magnetic field remains stable, and after around ten years it decreases only by ~1% (according to research),
- Neodymium magnets prove to be remarkably resistant to demagnetization caused by external interference,
- Thanks to the shimmering finish, the layer of Ni-Cu-Ni, gold, or silver gives an visually attractive appearance,
- The surface of neodymium magnets generates a powerful magnetic field – this is a distinguishing feature,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Possibility of exact machining and adjusting to specific conditions,
- Huge importance in future technologies – they are commonly used in hard drives, drive modules, medical equipment, and complex engineering applications.
- Thanks to their power density, small magnets offer high operating force, in miniature format,
Disadvantages
- Susceptibility to cracking is one of their disadvantages. Upon intense impact they can break. We recommend keeping them in a special holder, which not only protects them against impacts but also increases their durability
- Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- We suggest casing - magnetic mount, due to difficulties in realizing nuts inside the magnet and complex shapes.
- Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these products can complicate diagnosis medical in case of swallowing.
- Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what affects it?
- with the application of a sheet made of special test steel, ensuring maximum field concentration
- possessing a massiveness of minimum 10 mm to avoid saturation
- with a surface perfectly flat
- under conditions of ideal adhesion (metal-to-metal)
- for force acting at a right angle (in the magnet axis)
- in stable room temperature
Key elements affecting lifting force
- Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by veneer or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Load vector – maximum parameter is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
- Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
- Steel grade – ideal substrate is high-permeability steel. Stainless steels may generate lower lifting capacity.
- Surface finish – ideal contact is possible only on polished steel. Rough texture create air cushions, weakening the magnet.
- Thermal factor – high temperature weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was assessed by applying a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, in contrast under parallel forces the holding force is lower. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.
Precautions when working with NdFeB magnets
Do not overheat magnets
Avoid heat. Neodymium magnets are susceptible to temperature. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).
Nickel coating and allergies
Allergy Notice: The Ni-Cu-Ni coating contains nickel. If redness appears, cease handling magnets and wear gloves.
Handling rules
Be careful. Rare earth magnets attract from a long distance and connect with massive power, often quicker than you can move away.
Fire warning
Powder created during machining of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.
Safe distance
Powerful magnetic fields can erase data on credit cards, hard drives, and storage devices. Keep a distance of at least 10 cm.
Magnet fragility
Neodymium magnets are ceramic materials, which means they are fragile like glass. Collision of two magnets will cause them cracking into small pieces.
Bone fractures
Large magnets can smash fingers in a fraction of a second. Under no circumstances put your hand betwixt two strong magnets.
Choking Hazard
NdFeB magnets are not intended for children. Eating a few magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and requires urgent medical intervention.
Life threat
People with a pacemaker should maintain an absolute distance from magnets. The magnetism can disrupt the operation of the implant.
Threat to navigation
Note: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a separation from your phone, tablet, and navigation systems.
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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