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UMGGZ 34x6 [M4] GZ / N38 - rubber magnetic holder external thread
rubber magnetic holder external thread
Catalog no 340311
GTIN/EAN: 5906301814733
Diameter Ø
34 mm [±1 mm]
Height
6 mm [±1 mm]
Weight
26 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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Specifications along with form of neodymium magnets can be verified with our
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Technical specification - UMGGZ 34x6 [M4] GZ / N38 - rubber magnetic holder external thread
Specification / characteristics - UMGGZ 34x6 [M4] GZ / N38 - rubber magnetic holder external thread
| properties | values |
|---|---|
| Cat. no. | 340311 |
| GTIN/EAN | 5906301814733 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 34 mm [±1 mm] |
| Height | 6 mm [±1 mm] |
| Weight | 26 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 |
Material specification
| 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 |
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Pros and cons of Nd2Fe14B magnets.
Strengths
- Their power is durable, and after approximately ten years it drops only by ~1% (according to research),
- They feature excellent resistance to weakening of magnetic properties when exposed to opposing magnetic fields,
- The use of an aesthetic layer of noble metals (nickel, gold, silver) causes the element to look better,
- Neodymium magnets ensure maximum magnetic induction on a contact point, which increases force concentration,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
- Possibility of detailed creating and modifying to individual applications,
- Significant place in modern industrial fields – they are used in HDD drives, drive modules, medical devices, also technologically advanced constructions.
- Compactness – despite small sizes they generate large force, making them ideal for precision applications
Weaknesses
- They are fragile upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
- Limited possibility of producing threads in the magnet and complex shapes - recommended is cover - magnet mounting.
- Health risk to health – tiny shards of magnets can be dangerous, in case of ingestion, which gains importance in the context of child health protection. It is also worth noting that small elements of these devices can complicate diagnosis medical in case of swallowing.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities
Pull force analysis
Highest magnetic holding force – what contributes to it?
- using a base made of mild steel, acting as a circuit closing element
- with a cross-section no less than 10 mm
- with a plane cleaned and smooth
- without the slightest insulating layer between the magnet and steel
- under vertical force vector (90-degree angle)
- at standard ambient temperature
Key elements affecting lifting force
- Clearance – the presence of any layer (paint, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Direction of force – highest force is obtained only during perpendicular pulling. The resistance to sliding of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
- Plate thickness – too thin sheet does not accept the full field, causing part of the power to be lost to the other side.
- Steel grade – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
- Surface structure – the more even the plate, the better the adhesion and higher the lifting capacity. Roughness creates an air distance.
- Thermal factor – hot environment weakens pulling force. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity was assessed using a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, whereas under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate lowers the lifting capacity.
Safe handling of neodymium magnets
Magnetic interference
Be aware: rare earth magnets produce a field that interferes with sensitive sensors. Keep a safe distance from your mobile, tablet, and navigation systems.
Eye protection
Despite the nickel coating, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.
Warning for heart patients
Warning for patients: Strong magnetic fields disrupt electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.
Protect data
Intense magnetic fields can erase data on credit cards, HDDs, and other magnetic media. Keep a distance of at least 10 cm.
Adults only
Absolutely store magnets out of reach of children. Ingestion danger is significant, and the effects of magnets clamping inside the body are fatal.
Skin irritation risks
Certain individuals experience a hypersensitivity to Ni, which is the standard coating for NdFeB magnets. Extended handling may cause skin redness. We strongly advise use protective gloves.
Flammability
Machining of NdFeB material poses a fire hazard. Magnetic powder oxidizes rapidly with oxygen and is difficult to extinguish.
Heat warning
Control the heat. Heating the magnet to high heat will permanently weaken its properties and strength.
Handling guide
Use magnets consciously. Their powerful strength can shock even experienced users. Stay alert and respect their force.
Bodily injuries
Risk of injury: The attraction force is so great that it can result in hematomas, crushing, and even bone fractures. Protective gloves are recommended.
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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