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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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Technical - 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% |
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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Advantages and disadvantages of Nd2Fe14B magnets.
Strengths
- Their strength remains stable, and after around ten years it decreases only by ~1% (theoretically),
- They are resistant to demagnetization induced by external disturbances,
- Thanks to the smooth finish, the surface of Ni-Cu-Ni, gold, or silver gives an visually attractive appearance,
- Magnets possess excellent magnetic induction on the outer side,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
- Due to the option of accurate forming and customization to custom solutions, magnetic components can be manufactured in a wide range of geometric configurations, which expands the range of possible applications,
- Wide application in high-tech industry – they find application in magnetic memories, electromotive mechanisms, diagnostic systems, as well as other advanced devices.
- Compactness – despite small sizes they provide effective action, making them ideal for precision applications
Limitations
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a special holder, which not only protects them against impacts but also raises their durability
- Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
- Limited ability of creating nuts in the magnet and complex shapes - preferred is casing - magnetic holder.
- Health risk to health – tiny shards of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. It is also worth noting that small elements of these magnets are able to disrupt the diagnostic process medical when they are in the body.
- High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit 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 magnetic yoke
- whose thickness reaches at least 10 mm
- characterized by smoothness
- under conditions of no distance (surface-to-surface)
- under axial force direction (90-degree angle)
- at temperature approx. 20 degrees Celsius
Practical lifting capacity: influencing factors
- Air gap (betwixt the magnet and the metal), since even a microscopic clearance (e.g. 0.5 mm) leads to a drastic drop in lifting capacity by up to 50% (this also applies to paint, rust or debris).
- Load vector – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
- Plate thickness – too thin steel does not accept the full field, causing part of the flux to be wasted into the air.
- Material composition – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
- Surface finish – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
- Temperature – temperature increase results in weakening of force. Check the maximum operating temperature for a given model.
Holding force was checked on the plate surface of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate reduces the lifting capacity.
H&S for magnets
Product not for children
Only for adults. Tiny parts pose a choking risk, leading to intestinal necrosis. Store out of reach of kids and pets.
Powerful field
Handle with care. Rare earth magnets attract from a long distance and snap with massive power, often faster than you can react.
Shattering risk
Watch out for shards. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.
Demagnetization risk
Keep cool. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, inquire about special high-temperature series (H, SH, UH).
Serious injuries
Danger of trauma: The attraction force is so great that it can cause blood blisters, pinching, and broken bones. Protective gloves are recommended.
Implant safety
Individuals with a heart stimulator must keep an absolute distance from magnets. The magnetic field can interfere with the functioning of the life-saving device.
Allergy Warning
Some people suffer from a sensitization to nickel, which is the standard coating for neodymium magnets. Frequent touching may cause dermatitis. It is best to use safety gloves.
Phone sensors
A powerful magnetic field negatively affects the functioning of magnetometers in smartphones and GPS navigation. Do not bring magnets close to a device to avoid breaking the sensors.
Protect data
Intense magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Stay away of min. 10 cm.
Dust explosion hazard
Powder produced during grinding of magnets is flammable. Do not drill into magnets unless you are an expert.
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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