![Magnetic holder with external thread UMGZ 20x15x7 [M4] GZ / N38](https://cdn3.dhit.pl/graphics/banners/magnet.webp "Magnetic holder with external thread UMGZ 20x15x7 [M4] GZ / N38")
![UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread](https://cdn3.dhit.pl/graphics/products/um-20x15x7-m4-gz-vaf.jpg)
![UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread - ujęcie 2](https://cdn3.dhit.pl/graphics/products/umgw-20x15x7-m4-gz-jeb.jpg)
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
bulk discounts:
Need more?
Pick up the phone and ask
+48 22 499 98 98
alternatively drop us a message by means of
our online form
through our site.
Lifting power along with shape of magnetic components can be reviewed on our
magnetic calculator.
Order by 14:00 and we’ll ship today!
Detailed specification - 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 |
Chemical composition
| 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 |
Other proposals
![UMGZ 60x30x15 [M10] GZ / N38 - magnetic holder external thread](https://cdn3.dhit.pl/graphics/products/umgw-60x30x15-m10-gz-bas.jpg "UMGZ 60x30x15 [M10] GZ / N38 - magnetic holder external thread")
Pros as well as cons of neodymium magnets.
Pros
- They do not lose power, even over approximately 10 years – the decrease in strength is only ~1% (theoretically),
- They retain their magnetic properties even under external field action,
- In other words, due to the smooth layer of silver, the element is aesthetically pleasing,
- The surface of neodymium magnets generates a strong magnetic field – this is a key feature,
- Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
- Thanks to flexibility in constructing and the ability to adapt to unusual requirements,
- Fundamental importance in electronics industry – they are utilized in magnetic memories, electric drive systems, medical equipment, and modern systems.
- Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which allows their use in miniature devices
Cons
- Brittleness is one of their disadvantages. Upon intense impact they can break. We advise keeping them in a strong case, which not only secures 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 power. Therefore, we recommend our special magnets marked [AH], which maintain stability even at temperatures up to 230°C
- When exposed to humidity, magnets start to rust. To use them in conditions outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
- Due to limitations in producing nuts and complex shapes in magnets, we propose using casing - magnetic mechanism.
- Health risk to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the aspect of protecting the youngest. It is also worth noting that tiny parts of these devices can be problematic in diagnostics 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 increases costs of application in large quantities
Holding force characteristics
Best holding force of the magnet in ideal parameters – what it depends on?
- using a plate made of low-carbon steel, serving as a magnetic yoke
- with a thickness minimum 10 mm
- with an ground touching surface
- with direct contact (without paint)
- during detachment in a direction vertical to the plane
- in neutral thermal conditions
Lifting capacity in real conditions – factors
- Space between surfaces – every millimeter of distance (caused e.g. by veneer or dirt) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to pulling vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of maximum force).
- Steel thickness – insufficiently thick sheet causes magnetic saturation, causing part of the flux to be wasted into the air.
- Metal type – not every steel reacts the same. Alloy additives worsen the interaction with the magnet.
- Smoothness – full contact is possible only on polished steel. Any scratches and bumps reduce the real contact area, weakening the magnet.
- Thermal environment – heating the magnet results in weakening of induction. It is worth remembering the maximum operating temperature for a given model.
Lifting capacity was measured by applying a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under parallel forces the load capacity is reduced by as much as 75%. In addition, even a slight gap between the magnet and the plate decreases the load capacity.
Precautions when working with NdFeB magnets
Crushing risk
Big blocks can break fingers instantly. Under no circumstances place your hand between two attracting surfaces.
Permanent damage
Monitor thermal conditions. Exposing the magnet above 80 degrees Celsius will permanently weaken its properties and pulling force.
Fragile material
Beware of splinters. Magnets can fracture upon violent connection, ejecting shards into the air. Wear goggles.
GPS and phone interference
A powerful magnetic field disrupts the operation of magnetometers in smartphones and navigation systems. Keep magnets near a smartphone to prevent damaging the sensors.
Choking Hazard
Absolutely store magnets out of reach of children. Choking hazard is significant, and the effects of magnets clamping inside the body are very dangerous.
Dust explosion hazard
Powder generated during cutting of magnets is combustible. Avoid drilling into magnets unless you are an expert.
Caution required
Before starting, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Think ahead.
Magnetic media
Powerful magnetic fields can destroy records on payment cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.
Pacemakers
Life threat: Strong magnets can deactivate pacemakers and defibrillators. Stay away if you have medical devices.
Warning for allergy sufferers
Nickel alert: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, cease working with magnets and use protective gear.
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
Rate the product
Your rating