![Magnetic holder with external thread UMGZ 25x17x8 [M5] GZ / N38](https://cdn3.dhit.pl/graphics/banners/magnet.webp "Magnetic holder with external thread UMGZ 25x17x8 [M5] GZ / N38")
![UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread](https://cdn3.dhit.pl/graphics/products/um-25x17x8-m5-gz-keb.jpg)
![UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread - ujęcie 2](https://cdn3.dhit.pl/graphics/products/umgw-25x17x8-m5-gz-bak.jpg)
UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread
magnetic holder external thread
Catalog no 190323
GTIN/EAN: 5906301813828
Diameter Ø
25 mm [±1 mm]
Height
17 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
25 g
Load capacity
17.00 kg / 166.71 N
12.23 ZŁ with VAT / pcs + price for transport
9.94 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Contact us by phone
+48 888 99 98 98
or send us a note by means of
contact form
the contact page.
Force along with appearance of neodymium magnets can be calculated using our
power calculator.
Orders placed before 14:00 will be shipped the same business day.
Technical parameters of the product - UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread
Specification / characteristics - UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread
| properties | values |
|---|---|
| Cat. no. | 190323 |
| GTIN/EAN | 5906301813828 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| Height | 17 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 25 g |
| Load capacity ~ ? | 17.00 kg / 166.71 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other deals
![SM 32x100 [2xM8] / N42 - magnetic separator](https://cdn3.dhit.pl/graphics/products/sm-32x100-2xm8-cox.jpg "SM 32x100 [2xM8] / N42 - magnetic separator")
![UI 33x13x4 [C311] / N38 - badge holder](https://cdn3.dhit.pl/graphics/products/ui33x13x4-c311-vub.jpg "UI 33x13x4 [C311] / N38 - badge holder")
![AM ucho małe [M8] - magnetic accessories](https://cdn3.dhit.pl/graphics/products/am-ucho-małe-m8-zud.jpg "AM ucho małe [M8] - magnetic accessories")
Advantages and disadvantages of rare earth magnets.
Advantages
- They do not lose power, even over nearly ten years – the drop in lifting capacity is only ~1% (according to tests),
- They feature excellent resistance to magnetic field loss as a result of external magnetic sources,
- The use of an refined finish of noble metals (nickel, gold, silver) causes the element to present itself better,
- Magnets are characterized by huge magnetic induction on the active area,
- Through (adequate) combination of ingredients, they can achieve high thermal strength, allowing for functioning at temperatures approaching 230°C and above...
- Possibility of individual machining and adapting to individual needs,
- Key role in innovative solutions – they are utilized in hard drives, brushless drives, precision medical tools, as well as other advanced devices.
- Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which makes them useful in miniature devices
Limitations
- To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
- Neodymium magnets decrease their force 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
- Magnets exposed to a humid environment can rust. Therefore during using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- We recommend cover - magnetic holder, due to difficulties in creating nuts inside the magnet and complex forms.
- Health risk to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the context of child safety. Additionally, small elements of these devices can be problematic in diagnostics medical in case of swallowing.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Pull force analysis
Detachment force of the magnet in optimal conditions – what it depends on?
- using a plate made of low-carbon steel, acting as a ideal flux conductor
- whose thickness equals approx. 10 mm
- characterized by smoothness
- under conditions of gap-free contact (surface-to-surface)
- under vertical force direction (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
Lifting capacity in real conditions – factors
- Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
- Direction of force – maximum parameter is reached only during perpendicular pulling. The force required to slide of the magnet along the plate is standardly several times lower (approx. 1/5 of the lifting capacity).
- Plate thickness – too thin steel does not accept the full field, causing part of the power to be wasted to the other side.
- Steel grade – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
- Surface quality – the more even the plate, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
- Operating temperature – NdFeB sinters have a negative temperature coefficient. When it is hot they lose power, and at low temperatures gain strength (up to a certain limit).
Lifting capacity was measured with the use of a polished steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under attempts to slide the magnet the load capacity is reduced by as much as fivefold. Moreover, even a small distance between the magnet’s surface and the plate lowers the load capacity.
Precautions when working with neodymium magnets
Do not give to children
Absolutely keep magnets away from children. Ingestion danger is significant, and the consequences of magnets connecting inside the body are life-threatening.
Machining danger
Drilling and cutting of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.
Safe distance
Powerful magnetic fields can corrupt files on payment cards, hard drives, and other magnetic media. Stay away of at least 10 cm.
Bodily injuries
Mind your fingers. Two powerful magnets will join immediately with a force of massive weight, crushing everything in their path. Exercise extreme caution!
Fragile material
Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.
Life threat
For implant holders: Powerful magnets affect electronics. Keep at least 30 cm distance or ask another person to handle the magnets.
Handling rules
Before use, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.
Phone sensors
GPS units and smartphones are highly susceptible to magnetism. Direct contact with a strong magnet can decalibrate the sensors in your phone.
Operating temperature
Control the heat. Exposing the magnet to high heat will ruin its properties and strength.
Sensitization to coating
A percentage of the population experience a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Prolonged contact might lead to skin redness. We suggest wear protective gloves.
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