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UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread
magnetic holder rubber internal thread
Catalog no 160305
GTIN/EAN: 5906301813637
Diameter Ø
29 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
18 g
Load capacity
6.40 kg / 62.76 N
8.61 ZŁ with VAT / pcs + price for transport
7.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Physical properties - UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread
Specification / characteristics - UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread
| properties | values |
|---|---|
| Cat. no. | 160305 |
| GTIN/EAN | 5906301813637 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 29 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 18 g |
| Load capacity ~ ? | 6.40 kg / 62.76 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 neodymium magnets.
Strengths
- They retain attractive force for almost 10 years – the drop is just ~1% (according to analyses),
- Magnets very well defend themselves against loss of magnetization caused by ambient magnetic noise,
- By covering with a smooth coating of silver, the element has an modern look,
- Magnets exhibit maximum magnetic induction on the outer layer,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Thanks to versatility in forming and the capacity to customize to individual projects,
- Key role in high-tech industry – they serve a role in magnetic memories, electromotive mechanisms, precision medical tools, and multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which enables their usage in miniature devices
Limitations
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also improves its resistance to damage
- We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which secure oxidation and corrosion.
- Due to limitations in creating nuts and complex shapes in magnets, we recommend using casing - magnetic holder.
- Health risk related to microscopic parts of magnets are risky, if swallowed, which is particularly important in the context of child health protection. It is also worth noting that tiny parts of these products can complicate diagnosis medical when they are in the body.
- High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which hinders application in large quantities
Pull force analysis
Magnetic strength at its maximum – what contributes to it?
- with the use of a yoke made of low-carbon steel, guaranteeing maximum field concentration
- whose thickness is min. 10 mm
- with an polished contact surface
- without any air gap between the magnet and steel
- under axial force direction (90-degree angle)
- at ambient temperature room level
Lifting capacity in real conditions – factors
- Distance – the presence of any layer (rust, tape, air) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
- Force direction – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
- Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
- Plate material – mild steel gives the best results. Alloy steels reduce magnetic permeability and holding force.
- Surface condition – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
- Operating temperature – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).
Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the holding force is lower. Additionally, even a small distance between the magnet and the plate reduces the lifting capacity.
Warnings
Fragile material
Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.
Bone fractures
Watch your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!
Threat to navigation
Be aware: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a separation from your phone, tablet, and GPS.
Allergy Warning
A percentage of the population have a sensitization to Ni, which is the standard coating for NdFeB magnets. Frequent touching may cause dermatitis. We suggest wear protective gloves.
Danger to the youngest
Product intended for adults. Small elements can be swallowed, causing serious injuries. Keep out of reach of kids and pets.
Combustion hazard
Fire warning: Neodymium dust is highly flammable. Do not process magnets without safety gear as this may cause fire.
Electronic hazard
Avoid bringing magnets near a purse, computer, or screen. The magnetic field can destroy these devices and wipe information from cards.
Heat warning
Standard neodymium magnets (N-type) lose magnetization when the temperature surpasses 80°C. This process is irreversible.
Warning for heart patients
People with a ICD must maintain an large gap from magnets. The magnetic field can stop the operation of the implant.
Safe operation
Handle magnets with awareness. Their huge power can surprise even professionals. Be vigilant and respect their force.
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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