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UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread
magnetic holder external thread
Catalog no 190322
GTIN/EAN: 5906301813811
Diameter Ø
20 mm [±1 mm]
Height
15 mm [±1 mm]
Height
7 mm [±1 mm]
Weight
14 g
Load capacity
9.00 kg / 88.26 N
7.22 ZŁ with VAT / pcs + price for transport
5.87 ZŁ net + 23% VAT / pcs
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Technical parameters of the product - UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread
Specification / characteristics - UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread
| properties | values |
|---|---|
| Cat. no. | 190322 |
| GTIN/EAN | 5906301813811 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 20 mm [±1 mm] |
| Height | 15 mm [±1 mm] |
| Height | 7 mm [±1 mm] |
| Weight | 14 g |
| Load capacity ~ ? | 9.00 kg / 88.26 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 |
Other deals
Strengths and weaknesses of Nd2Fe14B magnets.
Strengths
- They have unchanged lifting capacity, and over around 10 years their performance decreases symbolically – ~1% (in testing),
- They retain their magnetic properties even under strong external field,
- A magnet with a smooth silver surface is more attractive,
- They are known for high magnetic induction at the operating surface, which increases their power,
- 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 flexibility in designing and the ability to adapt to individual projects,
- Universal use in advanced technology sectors – they serve a role in computer drives, electric motors, medical devices, also other advanced devices.
- Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications
Cons
- Brittleness is one of their disadvantages. Upon strong impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also raises their durability
- Neodymium magnets decrease their strength 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 durability even at temperatures up to 230°C
- 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
- Due to limitations in realizing threads and complicated forms in magnets, we propose using casing - magnetic mechanism.
- Potential hazard to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. It is also worth noting that tiny parts of these devices are able to complicate diagnosis 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
Lifting parameters
Maximum lifting force for a neodymium magnet – what it depends on?
- on a block made of structural steel, effectively closing the magnetic field
- possessing a massiveness of minimum 10 mm to avoid saturation
- with a plane cleaned and smooth
- without the slightest air gap between the magnet and steel
- for force applied at a right angle (pull-off, not shear)
- at temperature approx. 20 degrees Celsius
Lifting capacity in real conditions – factors
- Gap (betwixt the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) results in a drastic drop in force by up to 50% (this also applies to varnish, rust or dirt).
- Angle of force application – highest force is obtained only during perpendicular pulling. The force required to slide of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
- Wall thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
- Steel grade – the best choice is high-permeability steel. Stainless steels may generate lower lifting capacity.
- Surface condition – ground elements guarantee perfect abutment, which improves force. Uneven metal reduce efficiency.
- Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, 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, in contrast under shearing force the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate reduces the holding force.
Safe handling of NdFeB magnets
Compass and GPS
Navigation devices and smartphones are extremely sensitive to magnetic fields. Close proximity with a strong magnet can decalibrate the sensors in your phone.
Life threat
For implant holders: Strong magnetic fields disrupt medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.
Electronic hazard
Device Safety: Neodymium magnets can ruin data carriers and sensitive devices (heart implants, hearing aids, timepieces).
Dust is flammable
Combustion risk: Rare earth powder is explosive. Avoid machining magnets without safety gear as this may cause fire.
Material brittleness
Protect your eyes. Magnets can fracture upon violent connection, ejecting shards into the air. Wear goggles.
Adults only
NdFeB magnets are not intended for children. Accidental ingestion of a few magnets may result in them pinching intestinal walls, which constitutes a severe health hazard and necessitates urgent medical intervention.
Nickel coating and allergies
Allergy Notice: The Ni-Cu-Ni coating consists of nickel. If an allergic reaction occurs, cease working with magnets and wear gloves.
Permanent damage
Control the heat. Heating the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.
Bone fractures
Big blocks can smash fingers in a fraction of a second. Do not put your hand between two attracting surfaces.
Caution required
Before starting, read the rules. Sudden snapping can destroy the magnet or injure your hand. Be predictive.
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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